Percentage Calculator
Need to work out a percentage fast? Our free percentage calculator instantly finds a percentage of any number, compares two values, or calculates increase, decrease, and discounts — no formulas or spreadsheets required.
%
20% of 250 is
0
50 is what % of 200
0%
Change from 100 to 120 is
0%
How to Use
Step 1
Pick a Calculation Mode
Choose whether you want to find a percentage of a number, work out what percent one value is of another, or calculate a percent increase, decrease, or discount — each mode is built around a different everyday question, so picking the right one first saves you from re-entering numbers later.
Step 2
Enter Your Numbers
Type your starting value and percentage (or your before-and-after values for a change calculation) into the input fields — there's no limit on how many times you can recalculate, and you can clear the fields and start over at any point without reloading the page.
Step 3
Get Your Result Instantly
The tool runs the math the moment you finish typing, so you see your answer immediately without pressing a separate submit button, which makes it quick to test a few different numbers back to back.
Step 4
Switch Modes Anytime
Jump between calculation modes to check a different kind of percentage problem without reloading the page or losing your place, so you can, for example, check a discount price and then immediately verify a percentage increase in the same session.
Key Features
Versatile Math Modes
Easily compute percentage values, calculate percentage increase/decrease, or find proportional ratios.
Instant Live Results
Get precise numerical outputs in a fraction of a second without page reloads or delays.
Cross-Device Compatibility
Works smoothly across desktop browsers, laptops, tablets, and smartphones for quick daily calculations.
Total Data Privacy
Enjoy complete privacy as all calculations are processed locally in your browser without saving backend records.
Frequently Asked Questions
Enter the number and the percentage into this tool's "percentage of" mode, and it multiplies the two for you instantly — for example, 20% of 250 works out to 50, with no manual math needed. This mode is handy for tips, taxes, or splitting shared costs.
This calculator's percent-change mode takes your original and new value, finds the difference, and divides it by the original value to show you the exact percentage the number went up or down — useful for tracking things like salary raises, price changes, or year-over-year growth.
Yes — enter the original price and the discount percentage, and you'll instantly see both the amount you save and the final sale price, which makes it handy for comparing deals while shopping online or in store.
"Percent of" answers questions like "what is 15% of 80", while "percent change" compares two different values to tell you how much something grew or shrank in percentage terms — they're different calculations, so this tool keeps them as separate modes rather than mixing them into one confusing form.
No. Every calculation runs locally in your browser, so the numbers you enter — whether that's a salary, a grade, or a purchase price — are never transmitted to or stored on our servers.
No signup, account, or payment is required — this tool is free to use as often as you like, directly in your browser, on desktop or mobile.
This tool is built for common real-life math, not just classroom problems. Use it to split a bill fairly among friends, check how much you're really saving on a sale price, work out an exam or test score, or handle everyday business calculations — all without remembering a single formula or opening a spreadsheet.
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