Free Simple Interest Calculator
Enter the principal, rate and time to see the interest.
…
How to do it
- 1Choose your settings
Fill in the details or pick the options you need.
- 2See the result
The preview updates right away as you change things.
- 3Download or save it
Save the result to your device. Nothing is sent to or stored on a server.
About this tool
Calculate simple interest on a loan or a deposit. Enter the principal, the yearly rate and the time in years or months, and see the interest and the total amount. The formula is principal × rate × time ÷ 100.
Frequently asked questions
What is the formula for simple interest?
Simple interest = principal × rate × time ÷ 100, with the rate per year and time in years.
How is it different from compound interest?
Simple interest is only on the original amount. Compound interest also earns interest on earlier interest.
More tools you may need
Scientific CalculatorA free online scientific calculator with sin, cos, log, powers, roots and brackets.Typing Speed TestTest your typing speed in words per minute with accuracy.Webcam TestCheck that your camera works and see its resolution.Pomodoro TimerWork in 25-minute focus sessions with short and long breaks.Countdown Timer to a DateSee the days, hours, minutes and seconds until a date.Online RulerAn on-screen ruler in centimetres and inches, which you can calibrate with a bank card.