Percentage Calculator
ReadyEnter the number and the percentage into their boxes; the percentage value is computed instantly. Handy for discounts, raises and ratios. Everything runs in this browser.
All tools are free to use. File size and processing limits may vary by tool.
How to calculate?
Type the amount and the percentage and calculate; the result appears at once. Use it for shelf-price discounts or salary raises. See the VAT Calculator for tax-inclusive math.
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Percentage Calculator: Percent, Ratio and Change Guide
A percentage calculator finds a percentage of a number, one value as a share of another, and the increase or decrease between two figures. It is useful for shopping discounts, salary raises, exam scores and commissions. Enter values in the matching boxes; every calculation runs directly in your browser. This guide explains how to choose the correct mode and interpret results. Results are for information only.
Read the guide →Practical articles on this topic
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Worked example and verification
These fixed inputs were checked against the tool code. Recalculate with your own amounts and rates; monetary results are rounded to two decimals.
Formula checked on:
What is 20% of 1,000?
The result is 200. Subtracting it from 1,000 leaves 800. This example finds a percentage of an amount; it is not the same calculation as percentage change between two amounts.
1000 × 20 / 100 = 200
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