Math

Math calculators

Percentages, unit conversion, and a word counter.

Math tools cover everyday arithmetic that is not money or dates: percent of / percent change, length-weight-temperature conversion, and a word counter that never uploads the text. Percent change is not the same as “percent of.” 80 to 100 is a 25% increase, not 20%.

3 calculators

Math

Percentage Calculator

Calculate percent of a number, what percent X is of Y, and percent change.

Math

Unit Converter

Convert length, weight, and temperature between metric and US units.

Math

Word Counter

Count words, characters, sentences, and reading time in your browser.