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Discount Rate Calculator
A free tool to instantly calculate sale prices like “30% off” or “3/10 off”. Find the discounted price, the discount rate, or the original price — with the savings amount and formula shown for each.
How to Use
Two Modes
Each Tool
Tips
Discount Quick Reference
| Fraction | % Off | You Pay (multiplier) |
On $100 |
|---|---|---|---|
| 1/10 off | 10% off | 0.9 | $90 |
| 2/10 off | 20% off | 0.8 | $80 |
| 3/10 off | 30% off | 0.7 | $70 |
| 4/10 off | 40% off | 0.6 | $60 |
| 5/10 off (half) | 50% off | 0.5 | $50 |
| 7/10 off | 70% off | 0.3 | $30 |
“N/10 off” equals “N0% off”. The amount you pay is “original price × multiplier”.
Frequently Asked Questions
QWhat is 30% off $2,000?
AIt is $1,400. The math is “2,000 × (1 − 30 ÷ 100) = 2,000 × 0.7 = 1,400”. Enter the original price and rate in “① Discounted Price” above to get it automatically.
QWhat percentage is “3/10 off”?
A3/10 off equals 30% off. The fraction scale counts in tenths: 1/10 = 10%, 2/10 = 20%, and so on. Half price is 5/10 off = 50% off.
QWhat does a “0.7 multiplier” mean?
AA 0.7 multiplier means you pay 70% of the original price — the same as 30% off. Multiply the original price by the multiplier to get what you actually pay.
QCan I find the original price from the sale price?
AYes. Use “③ Original Price”: enter the discount rate and the sale price. The formula is “sale price ÷ (1 − rate ÷ 100)”. Example: $700 at 30% off → 700 ÷ 0.7 = $1,000.
QHow do I get the discount rate from a sale price?
AUse “② Discount Rate”: enter the original and sale price. The formula is “(original − sale) ÷ original × 100”. Example: $1,000 down to $700 is 30% off.