Percentage Calculator
Find X% of a number, what percent one value is of another, and percentage increase or decrease — all in one place.
What is X% of Y?
375 (= 15% of 2500)
X is what percent of Y?
75% (45 is that % of 60)
Percentage increase / decrease
+25% (increase)
Three percentage calculations in one tool
Percentages come up everywhere — discounts, exam marks, interest, tips and statistics. This tool covers the three most common questions at once: what is a percentage of a number, what percentage one number is of another, and the percentage change between two values. Just type your numbers and the answers appear instantly.
For converting exam marks or CGPA to a percentage specifically, use our dedicated Marks Percentage & CGPA calculator. Everything runs in your browser with nothing stored.
Frequently asked questions
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 15% of 2500 = 2500 × 15 ÷ 100 = 375. Use the first box above to do it instantly.
How do I find what percent one number is of another?
Divide the first number by the second and multiply by 100. For example, 45 out of 60 = 45 ÷ 60 × 100 = 75%. Use the second box above.
How is percentage increase or decrease calculated?
Subtract the old value from the new value, divide by the old value, and multiply by 100. A positive result is an increase; a negative result is a decrease.
Is it free?
Yes — free, no sign-up, and it runs entirely in your browser.
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