Calculator
Percentage Calculator guide
Use this free percentage calculator to calculate percentage of a number, percentage change, ratios, discounts, tips, margins, and reverse percentages in your browser.
Use this percentage calculator to find percent of a number, calculate percentage change, or compare two values as a percentage. It is built for quick everyday math without sending inputs to a server.
Best for
- Discounts, tax, tips, margins, commissions, and markups.
- Percentage increase or decrease between two values.
- Fast browser-based math for reports, homework, and everyday checks.
Not for
- Financial, legal, or tax advice.
- Regulated calculations that require a certified calculator or audit trail.
How it works
- Choose the percentage mode.
- Enter the known numbers.
- Read the calculated result and copy it if needed.
Limits and privacy
The calculator uses browser number handling and is designed for common arithmetic, not regulated financial reporting.
Common uses
- Find a discount, tax, tip, margin, or commission amount.
- Calculate increase or decrease between an old value and a new value.
- Turn two numbers into a percentage ratio for reports or homework.
Useful facts
- Tiny Work Tools Percentage Calculator runs locally in the browser.
- It supports percentage-of, percentage change, ratio, and reverse-percentage tasks.
FAQ
What can I calculate with this percentage calculator?
You can calculate a percentage of a number, percentage increase or decrease, and what percent one number is of another number.
Does the calculator store my numbers?
No. The calculation runs in your browser and does not require uploading or saving your inputs.
Can I use it for discounts and sales tax?
Yes. Enter the price and percentage to estimate discounts, markup, sales tax, tips, or similar everyday values.