Englishবাংলা

Free Online Calculators and Converters

Calculators and converters for money, health, study, dates and daily life. Enter your numbers, see the result at once, and read how it is calculated. Nothing you type leaves your device.

244 tools on this page, all free and all run in your browser.

Money and business

Work out loan payments and total interest, compare two loans, plan how to clear debt, project savings and retirement, and calculate margin, break-even and return. Tax tools cover Bangladesh and several other countries, with the source and review date on each page.

Health and daily life

Estimate BMI, calories, water, sleep, due dates and heart rate zones, track your week, or plan meals and trips. Health tools are guides, not medical advice, and say so on the page.

Study and numbers

GPA and CGPA calculators for Bangladesh and the US, percentages, fractions, averages, geometry, algebra and number tools help with homework and exams.

How to trust a result

Each calculator shows its formula or rules, an example and a note about limits. Rates and rules change, so check the official source linked on tax and fee pages for anything important.

VAT & Sales Tax CalculatorAdd or remove VAT or sales tax from a price.
UK Take-Home Pay CalculatorWork out your UK salary after income tax, National Insurance, pension and student loan.
US Paycheck CalculatorEstimate your US take-home pay after federal tax, Social Security, Medicare, 401(k) and state tax.
BMI CalculatorWork out your body mass index in kilos and centimetres or in stones, pounds and inches.
Date Difference CalculatorCount the days, weeks, months and years between two dates.
Add or Subtract Days from a DateFind the date that is a number of days, weeks, months or years from now.
Tip CalculatorWork out the tip and split the bill between people.
Discount CalculatorWork out the sale price after one or two discounts and tax.
Compound Interest CalculatorSee how savings or investments grow with interest on interest and monthly deposits.
Mortgage CalculatorWork out monthly mortgage payments for repayment or interest-only loans.
UK Stamp Duty CalculatorEstimate Stamp Duty Land Tax for a home in England and Northern Ireland.
CGPA / GPA CalculatorWork out your GPA with Bangladesh 5.0 or US 4.0 grade scales.
Zakat CalculatorEstimate the Zakat due on cash, gold, silver, investments and business assets.
Gold Bhori ConverterConvert between bhori, ana, roti, gram, tola and ounce, with the total price.
Hijri Date ConverterConvert between Gregorian and Islamic Hijri dates.
Calorie CalculatorEstimate the calories you need each day to maintain, lose or gain weight.
Stopwatch and TimerA simple online stopwatch with laps and a countdown timer with an alarm.
Random Picker and Spin WheelSpin a wheel to pick a name, flip a coin, roll dice or draw a random number.
QR Code ScannerScan a QR code with your camera or from a picture, right in the browser.
Scientific CalculatorA free online scientific calculator with sin, cos, log, powers, roots and brackets.
Fraction CalculatorAdd, subtract, multiply and divide fractions and mixed numbers.
Average, Median and Mode CalculatorFind the mean, median, mode, range and sum of a list of numbers.
Time CalculatorAdd or subtract days, hours, minutes and seconds.
GST CalculatorAdd or remove GST at 3, 5, 12, 18 or 28 percent, with CGST and SGST split.
SIP CalculatorEstimate the value of a monthly investment (SIP) after some years.
Simple Interest CalculatorWork out simple interest and the total amount for a loan or deposit.
Retirement Savings CalculatorEstimate your savings at retirement and what that is worth in today’s money.
Credit Card Payoff CalculatorSee how long it takes to clear a credit card and how much interest you pay.
Margin and Markup CalculatorWork out profit margin, markup and selling price from cost.
Canada Take-Home Pay CalculatorEstimate your salary after federal and provincial tax, CPP and EI.
Australia Take-Home Pay CalculatorEstimate your salary after income tax and the Medicare levy.
Pregnancy Due Date CalculatorEstimate your due date from the first day of your last period or the date of conception.
Ovulation and Period CalculatorEstimate your next period, ovulation day and fertile window.
Ideal Weight CalculatorSee a healthy weight range for your height using four common formulas.
Daily Water Intake CalculatorEstimate how much water you should drink each day.
Sleep Cycle CalculatorFind the best time to go to bed or wake up, based on 90-minute sleep cycles.
BMR and Macro CalculatorWork out your daily calories and grams of protein, carbs and fat for your goal.
Bangladesh Income Tax CalculatorEstimate yearly income tax for an individual in Bangladesh.
FDR and DPS CalculatorCalculate the maturity amount of a fixed deposit (FDR) or a monthly deposit scheme (DPS).
SSC / HSC GPA CalculatorCalculate your GPA out of 5.00, including the 4th subject.
Shoe Size ConverterConvert between EU, UK and US shoe sizes for men and women.
Countdown Timer to a DateSee the days, hours, minutes and seconds until a date.
Pomodoro TimerWork in 25-minute focus sessions with short and long breaks.
Online Alarm ClockSet an alarm in your browser with a ringing sound.
Age CalculatorFind your age in years, months and days from a birth date. Also the gap between two dates.
Land Unit ConverterConvert land area between katha, bigha, decimal, acre, square feet and square metres.
Taka in WordsWrite any Taka amount in words, in Bangla and English.
Savings Goal CalculatorFind how much to save every month to reach a target amount.
Break-even CalculatorFind how many units you must sell to cover your costs.
ROI CalculatorWork out the return on an investment as a percentage.
Commission CalculatorWork out commission on a sale, or the sales needed for a target.
Loan Amortization ScheduleSee every payment of a loan split into principal and interest.
Car Loan CalculatorEstimate the monthly payment and total cost of a car loan.
Student Loan Payoff CalculatorSee how long it takes to pay off a loan and what extra payments save.
Home Affordability CalculatorEstimate the home price you can afford from your income and debts.
50/30/20 Budget PlannerSplit your income into needs, wants and savings.
Net Worth CalculatorAdd up what you own and owe to see your net worth.
Inflation CalculatorSee what rising prices do to the value of money over the years.
Body Fat CalculatorEstimate your body fat percentage from simple tape measurements.
Target Heart Rate CalculatorFind your heart rate zones for exercise.
Running Pace CalculatorWork out your pace and race times from distance and time.
Protein Intake CalculatorEstimate how much protein you need each day.
Waist-to-Hip Ratio CalculatorCheck the ratio of your waist to your hips.
Calories Burned CalculatorEstimate the calories you burn in an activity.
Work Hours CalculatorAdd up your hours between start and end time, with breaks and pay.
Week Number FinderFind the week number, day of the year and quarter of any date.
Working Days CalculatorAdd business days to a date, or count the working days between two dates.
Zodiac Sign FinderFind your western zodiac sign from your birth date.
Leap Year CheckerCheck if a year is a leap year and see the next ones.
Birthday CountdownCount the days to your next birthday.
Chinese Zodiac FinderFind your Chinese zodiac animal and element from your birth year.
Lakh and Crore ConverterConvert between lakh, crore, thousand, million and billion.
Mobile Operator FinderFind the Bangladeshi mobile operator from the number prefix.
Cooking Measurement ConverterConvert cups, spoons, millilitres and grams for common ingredients.
Electricity Bill CalculatorEstimate the units and cost of your appliances.
Trip Cost CalculatorEstimate the fuel cost of a trip and split it between people.
Fuel Efficiency ConverterConvert between km/l, L/100km, mpg (US) and mpg (UK).
Speed, Distance and Time CalculatorFind speed, distance or time from the other two.
Paint CalculatorEstimate how much paint a room needs.
Brick and Concrete CalculatorEstimate bricks for a wall or cement, sand and aggregate for concrete.
Weighted Grade CalculatorWork out your weighted average and the final exam score you need.
Area and Tile CalculatorFind the floor area and how many tiles you need.
Decimal to Fraction ConverterChange a decimal to a simple fraction, or a fraction to a decimal.
Ratio and Proportion CalculatorSimplify a ratio or solve a proportion for the missing value.
Exponent and Root CalculatorRaise a number to a power, and find square, cube and nth roots and logs.
Quadratic Equation SolverSolve ax² + bx + c = 0 and see the roots, discriminant and vertex.
LCM and GCF CalculatorFind the least common multiple and greatest common factor of numbers.
Prime Number CheckerCheck if a number is prime and see its factors and nearby primes.
Standard Deviation CalculatorGet the mean, variance and standard deviation of a list of numbers.
Permutation and Combination CalculatorWork out nPr, nCr and factorials.
Number Base ConverterConvert numbers between binary, octal, decimal and hexadecimal.
Geometry CalculatorArea, perimeter, surface area and volume of common shapes.
Pythagorean Theorem CalculatorFind the missing side of a right triangle.
Readability Score CheckerCheck how easy your English text is to read.
Keyword Density and Word Frequency CounterSee which words and phrases you use most.
Text to URL Slug GeneratorTurn a title into a clean, SEO-friendly URL slug.
Roman Numeral ConverterConvert numbers to Roman numerals and back.
Text RepeaterRepeat a word or sentence as many times as you need.
Reverse Text ToolReverse the letters, the words or the lines of your text.
Add Line Numbers to TextPut a number in front of every line of your text.
Palindrome CheckerCheck if a word or sentence reads the same backwards.
Random Name GeneratorGenerate random Bangladeshi and English names.
Character Frequency CounterCount how often each letter or character appears.
Meta Tag GeneratorCreate title, description, Open Graph and Twitter meta tags.
Robots.txt GeneratorCreate a robots.txt file for your website.
UTM Link BuilderAdd campaign tracking to a link.
JWT DecoderRead the header and payload of a JSON Web Token.
YAML to JSON ConverterConvert YAML to JSON and JSON to YAML.
Color Contrast CheckerCheck text and background colours against WCAG contrast rules.
Color ConverterConvert colours between HEX, RGB, HSL and CMYK.
Cron Expression GeneratorBuild a cron schedule and read what it means.
CSS MinifierShrink CSS by removing comments and extra spaces.
JavaScript MinifierRemove comments and spaces from JavaScript.
HTML MinifierCompress HTML by removing comments and extra spaces.
XML FormatterFormat, indent or minify XML and check that it is well formed.
HTML Entities Encoder and DecoderConvert special characters to HTML entities and back.
SVG MinifierMake SVG files smaller by removing extras and rounding numbers.
JSON to XML ConverterConvert JSON data into XML.
ASCII TableLook up ASCII codes in decimal, hex and binary.
HTTP Status CodesA quick guide to HTTP status codes and what they mean.
Aspect Ratio CalculatorFind the aspect ratio and resize while keeping it.
Pixel to CM and Inch ConverterConvert between pixels, centimetres, millimetres and inches.
Super Calculator AustraliaProject your superannuation balance at retirement from your salary, balance and returns.
HECS-HELP Repayment CalculatorEstimate your compulsory HELP repayment for a year and how long the debt may take to clear.
Home Loan Repayment Calculator (Australia)Work out weekly, fortnightly or monthly home loan repayments, with an offset account.
ABN CheckerCheck whether an Australian Business Number has a valid format and check digits.
TFN Format CheckerCheck whether a nine-digit Tax File Number has a valid check digit.
Pay Frequency ConverterConvert a wage between hourly, weekly, fortnightly, monthly and yearly.
Casual Loading CalculatorConvert between a permanent base hourly rate and the casual rate with 25 percent loading.
Annual Leave Calculator (Australia)Work out annual and personal leave from the hours you worked, under the National Employment Standards.
Redundancy Pay Calculator (Australia)Estimate the minimum redundancy pay under the National Employment Standards from years of service.
Capital Gains Tax Estimator (Australia)Estimate the tax on a capital gain, with the 50 percent discount for assets held over 12 months.
Rental Yield CalculatorWork out the gross and net rental yield of an investment property.
Weekly to Monthly Rent ConverterConvert rent between weekly, fortnightly, monthly and yearly amounts.
Kilojoule to Calorie ConverterConvert kilojoules (kJ) to calories (kcal) and back.
Australia Time Zone ConverterSee the time in every Australian state and territory for a time you choose.
Tax Refund Estimator (Australia)Estimate your tax refund or amount owing from your income, tax withheld and deductions.
Fuel Cost Calculator (Australia)Work out the fuel cost of a trip from distance, litres per 100 km and price per litre.
Penalty Rates CalculatorWork out pay for hours at time and a half, double time and other penalty multipliers.
First Home Deposit CalculatorSee how much deposit you need, how far you are and how many months it will take to save.
Bonus Tax Calculator (Australia)Estimate the tax on a bonus using your marginal tax rate.
Australian Public HolidaysSee the national public holidays for any year, including Good Friday, Easter Monday and the King's Birthday.
Today's Bangla DateSee today's date in the Bangla calendar, with the weekday and Bangla digits.
UK Salary After Tax CalculatorWork out your UK take-home pay from a gross salary, after income tax and National Insurance.
UK National Insurance CalculatorWork out your yearly, monthly and weekly National Insurance on a salary or self-employed profit.
UK Student Loan Repayment CalculatorSee what you repay each month on Plan 1, 2, 4, 5 or a postgraduate loan.
UK Capital Gains Tax CalculatorEstimate the tax on a gain from shares, a second home or other assets, with the yearly exempt amount.
UK Dividend Tax CalculatorWork out the tax on dividends with the £500 allowance and the 2026-27 dividend rates.
UK Self-Employed Tax CalculatorEstimate income tax and Class 4 National Insurance on your profit and what you keep.
UK Inheritance Tax CalculatorEstimate inheritance tax with the nil-rate band, the residence nil-rate band and a spouse's unused allowance.
UK Holiday Entitlement CalculatorFind your statutory paid holiday in days from the days you work a week.
UK Bank HolidaysSee the bank holidays in England and Wales for any year, with substitute days.
UK Minimum Wage CalculatorSee the legal minimum pay per hour, week, month and year for your age and hours.
UK Redundancy Pay CalculatorWork out statutory redundancy pay from your age, years of service and weekly pay.
UK Mortgage Affordability CalculatorSee how much you could borrow from your income, and the monthly payment on that loan.
UK Pension Tax Relief CalculatorSee the tax relief added to your pension and the extra you can claim as a higher-rate taxpayer.
UK Child Benefit Tax Charge CalculatorWork out the High Income Child Benefit Charge from your income and number of children.
UK Statutory Maternity Pay CalculatorEstimate Statutory Maternity Pay for the 39 weeks from your average weekly earnings.
UK Statutory Sick Pay CalculatorWork out Statutory Sick Pay for the days you are off sick.
UK Energy Bill CalculatorEstimate a yearly and monthly gas or electricity bill from kWh, unit rate and standing charge.
Gas m³ to kWh ConverterConvert a gas meter reading in cubic metres or hundreds of cubic feet into kWh, and see the cost.
UK Late Payment Interest CalculatorWork out the statutory interest and fixed fee you can charge on a late business invoice.
UK Pay Rise CalculatorSee your new salary and how much extra you take home each month after tax and NI.
US Federal Income Tax CalculatorEstimate your federal income tax from your income, filing status and the standard deduction.
US Self-Employment Tax CalculatorWork out Social Security and Medicare tax on your self-employment income.
US Capital Gains Tax CalculatorEstimate federal tax on a short-term or long-term capital gain from your income and filing status.
US Overtime Pay CalculatorWork out time-and-a-half or double-time overtime and your total gross pay for the week.
401(k) CalculatorProject your 401(k) balance with contributions, employer match, pay raises and investment growth.
Roth IRA CalculatorSee how a Roth IRA grows with yearly contributions and why the growth is tax free.
Sales Tax CalculatorAdd sales tax to a price, or take it out of a price that already includes it.
FICA Tax CalculatorWork out Social Security and Medicare tax taken from your pay.
US Federal HolidaysSee the federal holidays for any year, with the day they are observed.
College GPA CalculatorCalculate your semester and cumulative GPA on the 4.0 scale from letter grades and credits.
Auto Lease CalculatorEstimate a monthly car lease payment from price, down payment, residual value and rate.
Rule of 72 CalculatorEstimate how many years it takes to double your money at a given interest rate.
CD Interest CalculatorWork out the interest and maturity value of a certificate of deposit from its APY and term.
RMD CalculatorEstimate your required minimum distribution from a retirement account using the uniform lifetime table.
PMI CalculatorEstimate private mortgage insurance and see how long you pay it with less than 20 percent down.
Property Tax Calculator (US)Estimate your yearly and monthly property tax from the home value and the local tax rate.
Closing Cost Calculator (US)Estimate the buyer's closing costs on a home purchase with a line-by-line breakdown.
US Time Zones ConverterConvert a time between Eastern, Central, Mountain, Pacific, Alaska and Hawaii time.
Mortgage Overpayment CalculatorSee how much interest and time you save by paying extra on your mortgage each month.
Rent vs Buy CalculatorCompare the cost of renting with buying a home over the years you plan to stay.
EV Charging Cost CalculatorEstimate the yearly and monthly cost of charging an electric car from distance, efficiency and electricity price.
EU VAT CalculatorAdd or remove VAT using the standard rate of any EU country.
Ireland Salary After Tax CalculatorEstimate take-home pay in Ireland after income tax, USC and PRSI.
Europe Time Zones ConverterConvert a time between London, Paris, Berlin, Athens, Moscow and other European time zones.
IBAN ValidatorCheck whether an IBAN has the right length and check digits.
Easter Date CalculatorFind the date of Easter Sunday, Good Friday and Pentecost for any year, Western and Orthodox.
EU, UK and US Clothing Size ConverterConvert women's dress and men's suit sizes between EU, UK and US.
Exchange Rate CalculatorConvert an amount with the exchange rate you type, and see the effect of a transfer fee.
Kilometres to Miles ConverterConvert kilometres to miles and miles to kilometres, with common race distances.
Celsius to Fahrenheit ConverterConvert temperatures between Celsius, Fahrenheit and Kelvin.
Stone to Kilograms ConverterConvert body weight between stones and pounds and kilograms.
Feet and Inches to CM ConverterConvert height between feet and inches and centimetres.
Oven Temperature ConverterConvert oven temperatures between Celsius, Fahrenheit, fan oven and gas mark.
CM to Inches ConverterConvert centimetres to inches and inches to centimetres, with the nearest fraction of an inch.
Pounds to Kilograms ConverterConvert pounds to kilograms and kilograms to pounds, with stones, ounces and grams.
Litres to Gallons ConverterConvert litres to US and UK gallons and back.
Canada GST/HST CalculatorAdd or remove GST, HST, PST and QST for any Canadian province.
Canada RRSP CalculatorSee the RRSP deduction limit, the tax you save and how a contribution could grow.
Canada Mortgage CalculatorCalculate Canadian mortgage payments with semi-annual compounding.
Canada Statutory HolidaysSee the federal statutory holidays in Canada for any year.
NZ PAYE CalculatorWork out New Zealand take-home pay after PAYE, ACC levy and KiwiSaver.
NZ KiwiSaver CalculatorProject your KiwiSaver balance at retirement from salary, contribution rate and return.
NZ Public HolidaysSee New Zealand's national public holidays for any year, including Matariki.
Blood Alcohol Content CalculatorEstimate blood alcohol concentration from drinks, body weight, sex and time.
One Rep Max CalculatorEstimate your one-rep max from the weight and reps of a set, with training percentages.
Dog Age CalculatorConvert your dog's age to human years by size.
Steps to Kilometres CalculatorConvert steps to kilometres and miles using your height.
Christmas CountdownSee how many days, weeks and sleeps are left until Christmas, or any date you choose.
Anniversary CalculatorCount how long it has been since a wedding, birthday or any special date, and the days to the next anniversary.
Freelance Hourly Rate CalculatorWork out the hourly rate you need to charge to reach your target income.
ROAS CalculatorWork out return on ad spend, ad profit and the break-even ROAS for your margin.
CTR CalculatorCalculate click-through rate, conversion rate, cost per click and cost per acquisition.
Loan Comparison CalculatorCompare two loans side by side: monthly payment, total interest and total cost with fees.
Debt Payoff PlannerSee how long it takes to clear several debts with the snowball or avalanche method.
Baby Vaccine Schedule (Bangladesh)Enter the date of birth to get the dates of the routine EPI vaccines for a baby in Bangladesh.
Password Strength CheckerCheck how strong a password is, with an entropy estimate and tips. Nothing is sent anywhere.
Multi Currency ConverterConvert one amount into several currencies at once using the rates you enter.
BCS and Government Job Age Limit CalculatorCheck your age on the circular date and see the last date you meet a job age limit.
CGPA to Percentage CalculatorConvert CGPA on a 4.0 or 5.0 scale to an approximate percentage.
Percentage to CGPA CalculatorConvert a percentage to an approximate CGPA on a 4.0 or 5.0 scale.
Marks to Grade Point (SSC and HSC)Find the letter grade and grade point for marks out of 100 on the SSC and HSC scale.
University Marks to Grade Point (4.0 Scale)Convert marks out of 100 to letter grade and grade point on the common UGC 4.0 scale.
University Admission GPA CalculatorAdd your SSC and HSC GPA, with optional weights, for admission eligibility.
Bangladesh VAT CalculatorAdd VAT to a price or take it out of a VAT-inclusive price at 15, 10, 7.5, 5, 4.5 or 2.4 percent.
Attendance Percentage CalculatorFind your attendance percentage and how many classes you can miss or must attend to reach 75 percent.
Marks Percentage CalculatorTurn obtained marks and total marks into a percentage.
Day of the Week FinderFind which day of the week any date falls on, such as the day you were born.
Days Until a Date CalculatorCount how many days are left until an exam, trip, wedding or any date.
Pregnancy Week CalculatorFind your current week of pregnancy, trimester and due date from the first day of your last period.
WhatsApp Link GeneratorCreate a wa.me link that opens a chat with your number and a ready message.
YouTube Timestamp Link GeneratorMake a YouTube link that starts the video at a chosen time.
Social Media Character CounterCheck your text against the limits of X, Instagram, LinkedIn, YouTube and meta descriptions.
Mailto Link GeneratorCreate a mailto: link with the address, subject and message already filled in.
Reading Time CalculatorEstimate how long a text takes to read or to say out loud.
Sort Lines AlphabeticallySort a list of lines A to Z, Z to A, by length or by number and remove duplicates.
Random Number GeneratorGenerate one or many random numbers between a minimum and a maximum, with or without repeats.
Body Surface Area CalculatorCalculate body surface area from height and weight with the Mosteller and Du Bois formulas.
PPF Calculator (India)Estimate the maturity amount of a Public Provident Fund account.
Gratuity Calculator (India)Calculate gratuity from last drawn basic pay plus DA and years of service.
HRA Exemption Calculator (India)Find the monthly house rent allowance that is exempt from tax under the old regime.
Social Media Image Size GuideCurrent image sizes in pixels for Instagram, Facebook, YouTube, X, LinkedIn, TikTok, WhatsApp and Pinterest.

Frequently asked questions

Are these calculators accurate?

They apply standard formulas and published rates. For official decisions check the source named on the page.

Is my data saved?

No. Calculators run in your browser. Planners keep entries only on your own device.

Can I put a calculator on my website?

Many calculators have an embed code at the bottom of the page.

Which currency does it use?

Whatever you type. The sums work for any currency.

Completely freeNo cost, no sign-up
Files stay privateEverything runs in your browser
Easy in BanglaIn both Bangla and English