Math Calculator

Find the sale price in seconds

Enter any original price and discount percentage to instantly see the final price, savings amount, and total for multiple items.

💡20% off $100.00 = $80.00 (you save $20.00)

Used by 50,000+ users monthly · No sign-up required · Instant results

Original price

−

Discount %

Qty

Sale price

$80.00

You save $20.00 (20% off)

Original price

$100.00

Discount

−$20.00

Final price

$80.00

Quick discounts — $100.00

Frequently asked questions

To find the price after a discount: Sale price = Original price × (1 − Discount% / 100). For example, 30% off $85: $85 × (1 − 0.30) = $85 × 0.70 = $59.50. The discount amount is $85 − $59.50 = $25.50. A quick mental shortcut: for 20% off, multiply by 0.80. For 25% off, multiply by 0.75. For 50% off, simply halve the price. This calculator handles any percentage and multiple quantities instantly.

To reverse a discount and find the original price: Original = Sale price ÷ (1 − Discount% / 100). For example, if an item is $60 after a 25% discount: $60 ÷ 0.75 = $80 original price. This is useful when you see a "sale price" tagged but want to verify what the original was, or when working out GST-inclusive prices. Our percentage calculator and GST calculator handle similar reverse calculations.

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