Calculators
Tip, loan, grade, and tax calculators. Type your numbers. We don’t save them, and the tax ones are a rough 2026 estimate.
Percentage calculator
What is 15% of 80, or what percent is 12 of 80, or how much did a number move?Tip calculator
Add a tip and split the bill with the people at the table.Discount calculator
See the sale price when a tag says 25% off.Markup calculator
You know the cost and the percent you add. Here’s the price you’d charge.Margin calculator
How much of the selling price is yours, or what to charge to hit a margin.BMI calculator
A height-and-weight number adults sometimes use as a rough check.Calorie deficit calculator
A rough daily calorie target if you want to eat a bit under maintenance.Age calculator
How old someone is on a particular day, in years, months, and days.GPA calculator
A plain 4.0 GPA from up to four classes.Grade calculator
The score you need on the final to land the grade you want.Mortgage calculator
The monthly payment on a fixed-rate home loan. Principal and interest only.Loan calculator
The monthly payment on a car loan or any fixed loan.Compound interest calculator
What a balance could grow to if you leave it, and maybe add a bit each month.APY calculator
The yearly yield you actually get once compounding is included.Hourly to yearly calculator
Turn an hourly rate into a yearly salary.Square footage calculator
How many square feet in a rectangular room.Fuel cost calculator
What the gas will cost for a drive.Pace calculator
Your pace per mile, and how fast that is in mph.ROI calculator
How much you made, as a percent of what you put in.Average calculator
The average of up to five numbers. Blank boxes are skipped.