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)
Calculate a percentage in 3 simple steps
Pick a calculation
Choose X% of a number, what percent one value is of another, or the percentage change.
Type your numbers
Enter your values in the boxes — there's no button to press.
Read the answer
The result updates instantly as you type, ready to copy or use.
Why use this percentage calculator
Three tools in one
Percentage of a number, percent of a total, and increase/decrease — no switching pages.
Instant results
Answers appear the moment you type — no submit, no waiting.
Accurate every time
Clean math with no rounding surprises, ideal for marks, discounts and interest.
100% private
Everything runs in your browser; nothing you type is uploaded or stored.
Works anywhere
Phone, tablet or desktop, in any modern browser.
Free & unlimited
No sign-up, no limits — use it as often as you like.
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.