Is 20% off better than $20 off?

Depends on the price. On a $50 item, $20 off is 40% — far better than 20%. On a $200 item, 20% off is $40 — better than $20 off. Flip to reverse mode and compare the effective percent.

How do stacked discounts work — is 20% + 10% the same as 30%?

No. Stacked discounts compound, so 20% then 10% off gives 28% total (multiplicatively: 0.8 × 0.9 = 0.72). Always apply them in sequence, not add them.

Does this calculator include sales tax?

No — it's pre-tax. Use the tax or VAT calculator after to compute the all-in price. The order matters by jurisdiction: most US states apply tax after the discount; some EU promotions advertise VAT-inclusive already.

What's the math for "buy one get one 50% off"?

If both items are the same price, BOGO-50% is a 25% discount on the pair. BOGO-100% ("buy one get one free") is a 50% discount on the pair. The deeper the second-item discount, the bigger the blended rate.

Money & Finance · Free tool

Discount Calculator

Enter original price and discount — get the final price, money saved, and double discount math. Free, fast, no sign-up.

Updated June 2026

Original price ($)Discount (%)

Discount amount

$20.00

You save

$20.00 (20.0%)

Final price

$80.00

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What it does

Work out the exact savings on any sale price in seconds. Forward mode takes an original price and a discount percent and shows the final price plus how much you save. Reverse mode takes an original and a sale price and tells you the effective discount percent — handy for comparing ambiguous promos.

All math runs locally, with no tracking. Pair with tax calculator to add sales tax to a discounted price, or margin calculator when you're setting the discount yourself as a seller.

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Paste this snippet into any page. Loads on-demand (lazy), no tracking scripts, and sized to most dashboards. Replace the height to fit your layout.

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Example input & output

Input

Original price: $120
Discount: 25%

Output

You pay: $90.00
You save: $30.00
Effective rate: 25% off

In reverse mode, entering $120 original and $90 sale would return the same 25% discount figure.

How to use it

Enter the original price.
Enter the discount percent (or pick reverse mode).
Read the final price and total savings.
In reverse mode, input the sale price to learn the real discount rate.

When to use this tool

Comparing "30% off" vs "$40 off" on the same item.
Checking whether a "buy 2 get 1 free" is really a 33% discount (spoiler: yes, on the cheapest item).
Working out the before-tax price after a sale — pair with the tax calculator for the all-in number.
Verifying that an advertised discount matches what the cash register actually rang up.

When not to use it

Computing percentage change over time (prices rising/falling year over year) — use the percentage change calculator.
Pricing a product you're selling — use the margin/markup calculator so you're optimizing profit, not retail optics.

Frequently asked questions

Is 20% off better than $20 off?: Depends on the price. On a $50 item, $20 off is 40% — far better than 20%. On a $200 item, 20% off is $40 — better than $20 off. Flip to reverse mode and compare the effective percent.
How do stacked discounts work — is 20% + 10% the same as 30%?: No. Stacked discounts compound, so 20% then 10% off gives 28% total (multiplicatively: 0.8 × 0.9 = 0.72). Always apply them in sequence, not add them.
Does this calculator include sales tax?: No — it's pre-tax. Use the tax or VAT calculator after to compute the all-in price. The order matters by jurisdiction: most US states apply tax after the discount; some EU promotions advertise VAT-inclusive already.
What's the math for "buy one get one 50% off"?: If both items are the same price, BOGO-50% is a 25% discount on the pair. BOGO-100% ("buy one get one free") is a 50% discount on the pair. The deeper the second-item discount, the bigger the blended rate.

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