Free online calculators for money, work hours, health, dates and everyday math. Instant results, no sign-up.
Which tool do I need?
- Work out a percentage, a percentage change or a percentage increase: Percentage Calculator
- See the sale price after a discount, or how much you save: Discount Calculator
- Total a week of clock-in and clock-out times, with lunch breaks and overtime: Time Card Calculator
- Split a restaurant bill and the tip between several people: Tip Calculator
- Find someone’s exact age in years, months and days: Age Calculator
- Count the days between two dates, or add days, weeks or months to a date: Date Calculator
- Check a monthly loan payment and the interest it costs: Loan Calculator
About these tools
Everyday calculators for the sums that come up at work, at the shop and at home: percentages and discounts, tips and split bills, ages and date gaps, work hours, body mass index and grade averages. Each one shows the working as well as the answer, so you can check it or copy it into a spreadsheet.
They run entirely in your browser. There is nothing to install, no account, and the numbers you type are not sent anywhere.
Frequently asked questions
Are these calculators free?
Yes. Every calculator is free to use with no sign-up and no limit on how often you use it. The site is paid for by advertising.
How accurate are the results?
They use the standard formulas and show the working, and you can change every assumption. Money results are rounded to the cent, and date tools count real calendar days, including leap years. See how our calculators work.
Do they work on a phone?
Yes. Every calculator works in a phone browser, and once the page has loaded most keep working offline.