Free Percent & Discount Calculator — Ratio, Change Rate | PareKit
Calculate ratio (A × B%), change rate (A→B), or discount (price minus %). Free, in-browser. Results update as you type. 100% in your browser.
Result
7,500
50,000 × 15% = 7,500
Percent calculations are used for ratios, discounts, and change rates. What is 15% of 50,000? How much did the price increase from 10,000 to 12,000? What's the final price after a 20% discount? Pare Calculators handles all three modes — ratio (A × B%), change rate (from A to B), and discount (price with % off). Results update as you type.
Ratio mode: find B% of A (e.g. 50,000 × 15% = 7,500). Change rate: percent increase or decrease from A to B (e.g. 10,000 → 12,000 = 20% increase). Discount: original price minus B% (e.g. 50,000 - 20% = 40,000, saved 10,000). Use ratio for tips, commissions, tax. Use change rate for growth, stock performance. Use discount for sales, promotions. Share results with the Share button. Results update as you type. All three modes work with decimals. Enter values in any order; the calculator handles the rest. Runs right in your browser. All calculations run locally in your browser. Share the URL with others.
How to Use the Percent Calculator
- Select mode — Choose Ratio (A × B%), Change Rate (from A to B), or Discount (price with % off).
- Enter values — Type numbers in the fields. Results update instantly as you type.
- Share or copy — Use the Share button to copy the URL with your inputs for sharing.
FAQ
Is the percent calculator free?
Yes. Free on this page, with limits noted per tool. All calculations run in your browser.
What is the difference between ratio and change rate?
Ratio: A's B% equals what? (e.g. 50,000 × 15% = 7,500). Change rate: from A to B, what % change? (e.g. 10,000 → 12,000 = 20% increase).
Does the discount mode show savings?
Yes. Enter original price and discount %. You get the final price and the amount saved.
Can I share my calculation with others?
Yes. Click Share to copy a URL with your inputs. Recipients see the same values and results.
Is my data sent to a server?
No. All calculations run in your browser. Your numbers never leave your device.