Discount Calculator

How one percentage off splits a price into saving and payment

A discount removes a portion of the original price. This calculator separates the saving from the remaining pre-tax price so a shopper can check a sale label without treating the discount percentage as the final price.

A single sale discount removes a percentage of the original price. The original price divides into two parts: the saving and the pre-tax amount paid. The receipt-style result lets you check that those two parts recombine to the listed price.

A receipt-like breakdown separates the amount saved from the pre-tax amount to pay. Both amounts reconcile to the entered original price under one discount.

How the original price, discount rate and cent rounding set the price

The calculator takes one price and one rate. Getting a correct answer mostly depends on entering the right price and recognizing what a single rate cannot represent.

Original price

The listed price before this discount, from 0.01 upward, in any currency. The saving scales with it, so the same 15% removes 7.4985 from 49.99 but 15 from 100. Enter the pre-sale price, not one that already has the discount applied, or the reduction is effectively taken twice.

Discount percent

One rate from 0 to 100, decimals allowed, so 12.5% off 100 leaves 87.5. A value above 100 is rejected rather than producing a negative price. If a tag says you pay 70%, enter 30 here, because the field expects the share removed, not the share paid.

Stacked or sequential offers

One rate is applied to one price. For a 20% sale followed by an extra 10% at checkout, run it twice: 100 at 20% leaves 80, then 80 at 10% leaves 72, a combined 28% off rather than 30%. Check the seller's terms, since some apply both rates to the original price instead.

Cent rounding

Amounts are displayed to at most two decimals without trailing zeros, so a 7.4985 saving reads 7.5 and the price to pay reads 42.49. Each figure is rounded separately after exact arithmetic, which is why a till that rounds the saving first can differ by one cent on some prices.

Steps

1. Enter the positive original item price.
2. Enter one discount from 0% to 100%.
3. Read the amount saved and price remaining before tax, shipping or other charges.

Reading tip: Enter the shelf price before the discount. The result is pre-tax; for a purchase total, add any applicable tax and shipping using the seller's actual rules.

How the calculation works

What every part means

original price

Positive listed price before applying the one entered discount.

discount %

Reduction rate from zero through one hundred percent.

amount saved

The portion removed from the listed price, before any tax or fees.

sale price

Remaining pre-tax amount after subtracting the saving once.

Calculate it step by step

The calculation retains Decimal precision until display. A merchant that rounds at intermediate steps may show a cent difference for some prices.

See how Calculation Guide tests examples and handles calculation limits.

See it in practice

Interpretation & limitations

How to read your result

The saved amount is not the same as the final price. At 25% off 200, the saving is 50 and the pre-tax payable price is 150.

Where this estimate stops

Only one percentage discount is modeled. Stacked coupons, minimum-spend rules, loyalty credits, tax, delivery and currency conversion are excluded.

Articles that use this calculator

• Profit Margin vs Markup: Why a 25% Markup Is Only a 20% MarginA 25% markup on cost gives a 20% margin on the selling price, because the same profit is divided by a larger number. Convert with margin = markup ÷ (1 + markup) and markup = margin ÷ (1 − margin).

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