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Calculate percentages, percentage change, and percentage of a number easily.
Percentage Calculator helps you complete this task in seconds directly in the browser without installing extra software.
Calculate percentages easily with multiple calculation modes: find percentage of a number, calculate percentage increase/decrease, find what percent one number is of another, and calculate percentage change. Essential for shopping discounts, finance, grades, statistics, and everyday math.
Select the type of percentage calculation you need.
Enter the required values in the input fields.
See the result calculated instantly as you type.
Use the reverse calculator to find original values from percentages.
Percentage Calculator runs entirely in your browser: it takes your input, processes it on your device, and returns the result instantly — nothing is uploaded to a server. Calculate percentages, percentage change, and percentage of a number easily.
To find X% of Y: multiply Y by X, then divide by 100. Example: 20% of 150 = (150 × 20) ÷ 100 = 30.
Subtract original from new, divide by original, multiply by 100. Example: 50 to 75 = (75-50)/50 × 100 = 50% increase.
(New Value - Original Value) / Original Value × 100. Positive result = increase, negative = decrease.