Skip to content

Percentage Calculator

Every common percentage calculation in one simple tool.

  • 🧮 Calculator
  • ✓ Free
  • ✓ No sign-up
  • ✓ Private — runs in your browser
  • ✓ Any device

What is % of ?

is what % of ?

% change from to

Increase or decrease by %

↑

↓

Why you’ll love Percentage Calculator

Instant & freeNo signup, no paywall, no limits — Percentage Calculator works the moment the page loads.
Completely privateEverything runs in your browser. Nothing you enter is ever uploaded or stored on a server.
Works on any deviceFully responsive and touch-friendly — use it on your phone, tablet or desktop.
Accurate & clearBuilt on the real formulas, with a breakdown you can actually trust.

How to use it

  1. 01

    Open it

    No download and no login — the tool is ready right at the top of this page.

  2. 02

    Use it

    Enter your details or start interacting. Everything updates live as you go.

  3. 03

    Get your result

    Copy, download or share your result in a single tap. That’s it.

About Percentage Calculator

A percentage calculator handles all the common percentage calculations you need, right in your browser. Whether you need to find what percent of a number something is, calculate a percentage increase or decrease, or work out a discount, this free tool does it instantly. No signup required—just enter your numbers and get the answer.

Percentage math comes up constantly in daily life: calculating tips, understanding discounts, comparing price changes, or figuring out how much you've saved. This calculator removes the mental math by letting you input your values and immediately see the result. It covers the calculations people actually need, from simple percent of problems to more involved increase and decrease scenarios.

Because it runs entirely in your browser with no account required, your data never leaves your device. There's nothing to download, install, or create an account for. Just open it when you need it and close it when you're done—it's the straightforward approach to solving percentage problems without unnecessary steps or friction.

Popular uses

  • ✦ Calculate the tip at a restaurant based on a percentage of your bill.
  • ✦ Figure out the actual price after a store discount is applied.
  • ✦ Find your test or exam score as a percentage.
  • ✦ Calculate how much your salary would increase with a percentage raise.
  • ✦ Determine what percentage of your budget to allocate to savings or expenses.

Frequently asked questions

How do I calculate what percent one number is of another?
Enter the part and the whole. The calculator divides the part by the whole and multiplies by 100 to give you the percentage. For example, 25 out of 100 is 25%.
How do I calculate percentage increase or decrease?
Enter the original amount and the new amount. The calculator finds the difference, divides it by the original, and multiplies by 100 to show you the change as a percentage.
Can I use this on my phone?
Yes. It works on any device with a web browser—phone, tablet, or computer. It's designed to be responsive and work just as well on a small screen as a large one.
What if I need to find the original price after a discount?
You can enter the discount percentage and the final price to calculate backwards and find what the original price was. The calculator handles reverse calculations without any special setup.
Is Percentage Calculator free to use?
Percentage Calculator is 100% free — no signup, no watermarks and no usage limits. It’s one of 200+ free tools we build and give away.
How accurate is this calculator?
It uses the standard formulas and shows its working, so you can verify every number. For big decisions, treat the result as a reliable estimate.

More calculators

All calculators
RRSP Tax Refund Calculator (Canada 2026)Estimate your 2026 RRSP tax refund by province. Enter income and contribution to... Running Pace & Race PredictorConvert pace ↔ time ↔ distance and predict your race times. CTC to In-Hand Salary Calculator (India)Convert annual CTC to monthly in-hand salary — new regime FY 2025-26 tax, PF & g...

People also use

Image Resizer & CompressorResize, convert and compress images to a target size (e.g. under 100 KB) — JPG/P... Free QR Code GeneratorDesign a beautiful QR code with your own title, subtitle, logo, colors and templ... Free Invoice Generator — Create a PDF InvoiceCreate a professional invoice with tax, discount and due date, then save it as a...
Browse all 317 free tools

We built this. We can build yours.

Percentage Calculator is one of our free tools. Need a website, app, AI agent or automation? Fixed price — and you own the code.

Start a projectOur services