Math tools

Percent of a number, what-percent, and percentage change — all three.

Add, subtract, multiply, and divide fractions, simplified automatically.

Mean, median, mode, range, variance, and standard deviation from a list.

Simplify a ratio or solve a proportion for the missing value.

Trig, logs, powers, and roots with a clean expression display.

Count significant figures and round a number to any precision.

Convert between binary, octal, decimal, and hexadecimal at once.

Turn course grades and credit hours into a weighted 4.0 GPA.

Weight your assignments to find your current grade and what you still need.