Free Calculators Tools
Everyday calculators for quick, accurate answers: percentages, discounts, growth, and exact age from a date of birth.
- PercentagesPercent of, what percent, change and discounts.
- AgeExact years, months and days on any date.
- InstantAnswers update as you type.
Clear answers, not just numbers
Each calculator explains its result in plain words, so you know what the number means, whether it is a 25 percent discount or an age on an application deadline. The formulas are written out on each page so you can check the working yourself.
Quick on any device
The calculators are built for phones first, with large inputs and a copy button for every answer. They work offline once loaded and store nothing you type.
Everyday questions they answer
How much will I pay after a 15 percent discount? What percentage did I score in the exam? How much did my bill go up since last year? How old will I be on the application deadline, and how many days until my next birthday? Each answer appears as you type, with the working explained on the tool page, and nothing you enter is stored. More calculators, including loan and unit conversions, are planned for this section.