Do the math. Decide better.
Free calculators for your money, your home loan, your business and everyday math. No sign-up, instant results, and the formula behind every answer.
- ✓ 25 calculators, all free
- ✓ No sign-up
- ✓ Instant results
- ✓ Works on your phone
Popular calculators
The ones people use every day.
- Business
Margin
Calculate profit margin and markup from cost and price, or find the selling price you need to reach a target margin.
Open calculator - Money
Compound interest
See how an initial deposit and regular contributions grow with compound interest, with any compounding frequency and a year-by-year breakdown.
Open calculator - Everyday
Percentage
Work out X% of a number, what percent one number is of another, or the whole when you know a part and its percentage.
Open calculator - Loans
Loan
Calculate the monthly payment, total interest and total cost of any fixed-rate loan, compare two loan offers side by side and see the full payment schedule.
Open calculator - Math
Calculator
A fast everyday calculator for adding, subtracting, multiplying, dividing and percentages, with keyboard support and a short history of your last calculations.
Open calculator - Business
Break-even
Find how many units you need to sell, and how much revenue you need, to cover your fixed costs, plus the units required to hit a profit target.
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Browse by topic
Each section groups calculators that work well together.
For your money
See how savings grow, what a loan really costs and how fast you can pay off a card.
For your business
What to charge, what you keep and how much you need to sell to break even.
Answers in seconds, no spreadsheets
Every calculator is free and works on your phone. Bookmark the page and come back whenever you need to make a decision with numbers.