Percent calculators
Pick a calculator. Each shows the answer as you type, with the steps underneath.
Percentage calculatorFind a percent of any number, such as 15% of 200.Open the calculator ›What percent is X of YTurn a part and a whole into a percent, such as 30 out of 200.Open the calculator ›X is Y% of what numberFind the whole when you know a part and its percent.Open the calculator ›Percent change calculatorPercent increase or decrease from an old value to a new value.Open the calculator ›Percent increase calculatorAdd a percent to a number, such as 200 plus 15%.Open the calculator ›Percent decrease calculatorTake a percent off a number, such as 200 minus 15%.Open the calculator ›Percentage difference calculatorCompare two values without choosing which is the base.Open the calculator ›Fraction to percentConvert a fraction such as 3/8 to a percent and a decimal.Open the calculator ›
Percent calculators
Method: standard arithmetic shown step by step; no outside data is used. Checked 2026-11-12.
Written by Calculators Free Editorial Team · Data checked 2026-11-12
About · How we verify this · Editorial policy · Corrections
About · How we verify this · Editorial policy · Corrections
General information only. Results are plain arithmetic on the numbers you enter; check anything important (money, health, school work) against your own records or the official source.