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Converters & Math
6 free tools for converters & math. Results update as you type — nothing to install, no signup.
Fraction Calculator
Add, subtract, multiply and divide fractions, with exact answers in lowest terms.
GPA Calculator
Term and cumulative GPA, weighted or unweighted, on whichever scale your school uses.
Percentage Calculator
Calculate percentages, percentage changes, and the original number in seconds.
Roman Numeral Converter
Convert numbers to Roman numerals and back, in either direction.
Temperature Converter
Convert Celsius to Fahrenheit and back, side by side.
Unit Converter
Convert metric and Imperial area, length, temperature, volume, and weight units side by side.
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