Free Percentage Calculator — No Signup, No App, No Account

Most percentage calculator apps want you to create an account, download something, or deal with a paywall for "premium" features. This calculator asks for nothing — open it, enter your numbers, get your result. No email required, no subscription, no tracking.

What the Calculator Does — Three Calculation Modes

Mode	Question It Answers	Example
What is X% of Y?	Find a percentage of a number	What is 18% of $85? → $15.30
X is what % of Y?	Find what percent one number is of another	42 is what % of 60? → 70%
% Change (old → new)	Find the percentage increase or decrease	From 80 to 96 → +20%

Each mode shows the result instantly as you type — no submit button required. All calculations run in your browser; no data is sent to any server.

Why No Account Is Needed

Percentage calculations are simple math — they don't require a server, a database, or a user profile. The formulas are four lines of JavaScript that run entirely in your browser on your device.

No account means:

• No email verification
• No password to create or forget
• No profile data collected
• No ads targeting based on your calculations
• No paywall for "advanced" modes

All three calculation modes are free, unlimited, and available immediately on every visit.

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Works on Any Device Without an App

The calculator works in any modern browser on any device:

• iPhone: Safari, Chrome, Firefox
• Android: Chrome, Firefox, Samsung Internet
• Mac: Safari, Chrome, Firefox
• Windows: Edge, Chrome, Firefox
• Chromebook: Chrome
• Linux: Firefox, Chrome

No download from the App Store or Play Store. No desktop installer. Open the page and use it immediately.

Common Uses

• Shopping: calculate discounts, sale prices, savings
• School: grade percentages, test scores, attendance
• Work: profit margins, KPIs, salary raises, growth rates
• Finance: interest, returns, portfolio change
• Health: weight loss percentage, BMI-related percentages
• General math: any calculation that involves "% of" or "% change"

See the full guide to all calculator modes and examples or jump straight to the tool below.

Frequently Asked Questions

Is the percentage calculator really free?

Yes, completely free. No freemium model, no premium tier, no trial period. All three calculation modes are fully available with no account or payment required.

Does it save my calculations?

No. Each session starts fresh — the calculator doesn't store or save your numbers. This is a privacy feature, not a limitation. If you want to save results, copy the numbers to your notes app.

Can I use it offline?

You need an internet connection to load the page. Once loaded, the calculations run locally in your browser without sending data to any server. The page needs to load initially but the math itself is fully offline once the page is open.