Discount Calculator

Percent-off math, live as you type: sale prices, original prices, and stacked discounts. Enter values in any card below.

Currency

X% off a price

% off

with % off

You pay -

You save -

e.g. 20% off $100 = $80

Find the original price

after % off

Original price -

You saved -

e.g. paid $80 at 20% off → original $100

Stack two discounts

% then % extra off

Final price -

Effective discount -

e.g. $100 with 20% off + extra 10% off = $72

Formulas used

Question	Formula
Sale price after D% off	Sale = Original × (1 − D/100)
Original from sale price	Original = Sale ÷ (1 − D/100)
Money saved	Savings = Original − Sale
Stacked discounts	Final = Original × (1 − D₁/100) × (1 − D₂/100)

Frequently asked questions

How do I calculate a discount?

Multiply the original price by 1 minus the discount percentage divided by 100. For example, 20% off a $50 item costs 50 × (1 − 0.20) = $40, so you save $10.

How do I find the original price from a sale price?

Divide the amount you paid by (1 − discount ÷ 100). If you paid $80 for an item marked 20% off, the original price was 80 ÷ 0.80 = $100.

How do I calculate a double discount?

Apply each discount in sequence instead of adding the percentages. A $100 item with 20% off plus an extra 10% off costs 100 × 0.80 × 0.90 = $72 — an effective discount of 28%, not 30%.

How do I find what percent I saved?

Divide the savings by the original price and multiply by 100. If a $60 item rings up at $45, you saved (60 − 45) ÷ 60 × 100 = 25%.