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Percentage Calculator
Percentages come up everywhere — discounts, exam scores, salary raises, growth rates — and getting the formula right by hand is easy to mess up. This percentage calculator covers the five most commonly searched percentage problems: finding what X% of a number is, calculating a percentage increase or decrease, finding the percentage difference between two values, and working backwards from a known part to find the original whole (reverse percentage). Just pick a mode and type your numbers in.
Percentage Calculator
Five common percentage problems, solved instantly.
Also known as: percent calculator, % calculator, percentage increase/decrease calculator, percentage off calculator.
FAQ
How do I calculate a percentage increase?
Subtract the old value from the new value, divide by the old value, then multiply by 100. The calculator above does this automatically in the Increase tab.
What is reverse percentage?
Reverse percentage finds the original total when you only know a part and what percentage that part represents.