Pro Calculators and Guides
How to Read a Military Date-Time Group (DTG) and Convert It to UTC
Decode DTGs like 211530ZOCT26, learn the zone letters from Z to Y, and convert a single DTG or a whole list into UTC or any other zone letter.
Category
Pro Calculators and Guides
Specialist calculators are only useful when you understand the rules behind the numbers. These guides explain what each professional calculator does, which inputs matter, how to read the result and where the official rules come from, covering payroll and tax, immigration and visas, housing, business compliance, engineering and science. Every guide links to a free tool that runs in your browser and keeps your figures private.
318 guides
Pro Calculators and Guides
Military Retired Pay: High-3 (2.5%) vs Blended Retirement (2.0%) Compared
How military retired pay is calculated under High-3 and the Blended Retirement System, with a worked 20-year example and a cost-of-living projection.
Pro Calculators and Guides
Interest on Unpaid Debts: How to Calculate the 8% Court Rate and Use It in a Claim
How statutory interest of 8 percent is calculated for a money claim, the daily rate, business debt rules and what to do before you start a claim.
Pro Calculators and Guides
Unpaid Overtime: How to Estimate an FLSA Back Pay Claim
How FLSA overtime is calculated, the two-year and three-year limits, liquidated damages and how to estimate unpaid overtime from your rate and hours.
Pro Calculators and Guides
How to Check a PAN Number Format and Read the Holder Type (Single or Bulk)
Learn how an Indian PAN is built, what the fourth and fifth letters mean, and how to check one number or a long list for format errors before you file.
Pro Calculators and Guides
Pay Raise Calculator: What a 4% Raise Really Gives You After Tax and Inflation
See what a raise is worth per year, month and week, after tax and after inflation, and how to compare an offer with your current pay.
Pro Calculators and Guides
Post-9/11 GI Bill: What It Pays for Tuition, Housing and Books
Understand the Post-9/11 GI Bill tiers, the private school cap, the housing allowance and the book stipend, and estimate your benefit for a school year.
Pro Calculators and Guides
How to Write a Proof of Address Letter (Landlord, Host or Self-Statement)
A practical guide to proof of address letters: who can write one, what to include, when a self-statement is accepted and how to produce one in minutes.
Pro Calculators and Guides
Property Tax Appeal: How to Tell Whether It Is Worth Your Time
Learn how to compare assessed and market value, estimate yearly savings, count the costs and decide if a property tax appeal pays off.