Percentage Calculator
Use our free Percentage Calculator to calculate percentages, percentage increase, percentage decrease, percentage difference, and find original numbers quickly and easily.
Use our free Percentage Calculator to calculate percentages, percentage increase, percentage decrease, percentage difference, and find original numbers quickly and easily.
Calculate percentage values, percentage growth, differences, and original totals instantly.
What is [ X ] % of [ Y ]?
[ X ] is what percent of [ Y ]?
What is the percentage increase/decrease from [ OLD VALUE ] to [ NEW VALUE ]?
What is the percentage difference between [ VALUE 1 ] and [ VALUE 2 ]?
If [ X ] % of a number is [ Y ], what is the original number?
Our online Percentage Calculator makes it fast and simple to solve five distinct percentage problems without doing manual algebra:
Understanding percentage calculations relies on basic ratios relative to 100. Here are the exact formulas used by our tool:
Formula = (X / 100) × YFormula = (X / Y) × 100%Formula = ((New Value - Old Value) / Old Value) × 100%Formula = |Value 1 - Value 2| / ((Value 1 + Value 2) / 2) × 100%Formula = Y / (X / 100)Here are practical examples demonstrating how each percentage formula works in practice:
(10 / 100) × 100 = 10(25 / 100) × 100 = 25%((125 - 100) / 100) × 100 = 25% increase((100 - 125) / 125) × 100 = 20% decrease|100 - 120| / 110 × 100 = 18.18%50 / (20 / 100) = 250Find quick answers to common questions about percentage calculations.
Multiply the total number by the percentage rate, then divide by 100. For example, to calculate 10% of 100: (10 / 100) × 100 = 10.
Subtract the original value from the new value, divide the result by the original value, and multiply by 100. For example, an increase from 100 to 125 is ((125 - 100) / 100) × 100 = 25% increase.
Subtract the new value from the original value, divide by the original value, and multiply by 100. For example, a decrease from 100 to 80 is ((100 - 80) / 100) × 100 = 20% decrease.
Percentage difference measures the relative difference between two numbers relative to their average. Formula: |Value 1 - Value 2| / ((Value 1 + Value 2) / 2) × 100. For example, the difference between 100 and 120 is 18.18%.
Divide the partial amount by the percentage rate written as a decimal (Percentage / 100). For example, if 20% of a number is 50, the original number is 50 / (20 / 100) = 250.