How does it work?
- Type or paste your data.
- The result appears instantly.
- Copy or download the result.
Why use Percentage Calculator?
- ✓ 100% free, no limits, no watermark
- ✓ No sign-up, no install
- 🔒 Files processed locally: full privacy
- 📱 Works on desktop, tablet and mobile
Frequently asked questions
How do I calculate a 30% discount?
Use the “… minus …%” row: 200 minus 30% = 140.
How do I calculate percent change?
(final − initial) ÷ initial × 100. From 80 to 100 is a 25% increase.
How do I calculate 15% of an amount?
Multiply the amount by 0.15, or use the tool's first mode.
How do I find the original price after a discount?
Divide the sale price by (1 – discount); e.g. 80 ÷ 0.8 = 100.
Is this tool really free?
Yes, 100% free, with no sign-up, no watermark and no usage limit.
Are my files safe?
Yes. Processing happens directly in your browser: your files are never uploaded to a server or stored.