Numbers Calculators & Tools

Our numbers calculators handle the math so you don't have to. From splitting restaurant bills and calculating tip amounts to working out percentages and letter grades, these tools give you instant, accurate answers. Whether you're a student, runner, or just trying to figure out a fair split, we've got you covered.

Tip Calculator

Split the bill, pick the tip, done.

Percentage Calculator

Calculate percentages in three different ways.

Running Pace Calculator

Find your pace, speed, and finish time.

Grade Calculator

Calculate your final grade and GPA.

Unit Converter

Convert between any units instantly.

Age in Days

Find out exactly how old you are — in every unit.

Random Number Generator

Generate truly random numbers in any range.