Ecommerce

Discount Calculator

Calculate final sale price, dollar savings, and effective savings percentage for any percentage or flat discount.

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Enter an original price and discount percentage.

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How Discount Calculation Works

A percentage discount reduces the original price by a fixed proportion. The discounted price and savings amount are derived from two simple formulas.

Sale Price

Price = Original × (1 − D/100)

Amount Saved

Saved = Original − Sale Price

D = discount percentage. Example: 25% off $120 → $120 × 0.75 = $90 sale price, $30 saved.

Percentage vs Flat Discounts

A percentage discount scales with the price — 20% off a $200 item saves $40, while 20% off a $50 item saves only $10. This makes percentage discounts effective for communicating relative value to shoppers.

A flat (dollar) discount deducts a fixed amount regardless of price — "$15 off" always means $15. Flat discounts perform well for high-ticket items where a percentage would result in an awkward number, or in coupon campaigns where a specific dollar figure is more compelling.

For ecommerce pricing strategy, percentage discounts are more common during sitewide sales (Black Friday, seasonal), while flat discounts are effective for cart abandonment recovery coupons and loyalty rewards.

Frequently asked questions

How do I calculate a discounted price?
Multiply the original price by (1 − discount% ÷ 100). For example, a 20% discount on a $50 item: $50 × (1 − 0.20) = $40. This works for any percentage discount applied to any price.
How do I find the amount saved?
Subtract the discounted price from the original price to find savings. Using the example above: $50 − $40 = $10 saved. You can also multiply the original price by the discount percentage and divide by 100.
What does 'double discount' mean?
A double discount (or stacked discount) applies two percentage reductions in sequence — not simply added together. A 20% then 10% discount results in 28% off total, not 30%, because the second discount applies to the already-reduced price.
How do I convert a sale price back to the original price?
Divide the sale price by (1 − discount% ÷ 100). For example, if an item costs $80 after a 20% discount, the original price was $80 ÷ 0.80 = $100.
What is a good discount percentage for ecommerce promotions?
Research suggests 20–30% discounts generate the highest conversion lift for most product categories. Discounts above 50% can signal quality concerns unless it is a clearance event.

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