Can I use a fixed dollar amount instead of a percent?

Yes. Switch to fixed amount off and enter the coupon value in the same currency as the original price. The tool subtracts that amount from the starting price to produce the sale price and savings.

Why might the calculator reject my inputs?

A percent over 100% or a fixed discount larger than the original price does not produce a meaningful simple sale price above zero. Check the tag again or cap the discount at the item price.

Does this include sales tax?

Only if you include tax in the original price you enter. For apples-to-apples coupon comparisons, keep tax treatment the same for every scenario you run.

How do I compare two different coupons?

Hold the original price constant and change only the percent or fixed amount. The lower sale price (or higher savings) wins, all else equal—then confirm any exclusions or minimum spends on the coupon fine print.

How do I model “take an extra 15% off” clearance?

Treat the clearance sticker price as your new original, then apply 15% off that amount. Do not apply both percentages to the first list price unless the store wording says so.

Is a larger percent always better than a dollar coupon?

Not always. On a cheap item, a fixed $10 off can beat a modest percent; on an expensive item, a high percent usually wins. Run both numbers rather than guessing from the headline.

How should I treat buy-one-get-one or half-off offers?

Model the effective discount on the items you will actually pay for. Two equal-priced items with one half off is 25% off the pair’s combined list total. Unequal prices need the specific store rules.

What about shipping, fees, or rebates?

Those sit outside a simple price-minus-discount model. Add them after you know the sale merchandise total if you care about out-the-door cost.

Why does my receipt differ by a few cents?

Merchants may round each line, apply tax before or after coupons, or enforce catalog rounding. Use this tool for planning and verify the register total before you pay.

Can I reverse a discount to find the original price?

If you know the sale price and the percent off, original ≈ sale ÷ (1 − rate). Example: $80 after 20% off implies $80 ÷ 0.80 = $100 list. Confirm the markdown order if multiple deals applied.

Is this financial or shopping advice?

No. It is a math helper for estimating sale prices and savings. Store policies, stock levels, and return rules still decide whether a purchase makes sense for you.

Are my prices stored anywhere?

No. Discount math runs in your browser and is not uploaded as a shopping history.

Discount Calculator

Sale tags mix percent-off stickers, dollar coupons, and “extra 15% off already reduced” offers that are easy to misread at the shelf. This discount calculator turns an original price plus a percent or fixed amount off into a clear sale price and savings total. Compare deals side by side before you buy, check whether a coupon beats a competing flyer, or reverse-engineer how much a markdown actually saves. Calculations stay in your browser so shopping scenarios never leave your device.

Original priceDiscount (%)

Savings

US$0.00

Final total

US$0.00

You save

—

Tip: switch between % and amount depending on the coupon you have.

Informational only; verify critical results independently.

How to use

Enter the original (pre-discount) price exactly as listed before the deal you are testing.
Choose percent off or fixed amount off to match the coupon or shelf tag language.
Type the percent (for example 25 for 25% off) or the currency amount (for example 15.00) as prompted.
Read the sale price and the amount saved so you can see both the checkout number and the true benefit.
To compare “20% off” versus “$10 off,” run the same original price twice and pick the lower sale price.
For clearance-plus-extra-percentage, use the clearance price as the new original, then apply the extra percent off.
Keep tax policy consistent: either enter pre-tax prices for both options or tax-inclusive prices for both.
If a code has a minimum spend, confirm your cart meets it before trusting the computed savings.
Stacking rules vary by store—when in doubt, apply discounts in the order the merchant states, one pass at a time.
Note the final figures for your budget or receipt check; small cent differences can come from store rounding at the register.

Examples

30% off $79.99 → savings $23.997 ≈ $24.00, sale price ≈ $55.99.
$25 off $120 → sale price $95; savings $25 (about 20.8% off).
15% off $199 → savings $29.85, sale price $169.15.
Two equal $40 items with BOGO half-off ≈ 25% off the pair → pay $60 instead of $80.
Member 10% off an already $90 sale item → $90 × 0.90 = $81.
$45 item with a $5 loyalty credit → sale price $40 (about 11.1% effective off).
Compare 25% off $80 (= $60) vs $15 flat off $80 (= $65)—percent wins.
Flash sale: 40% off $249.00 → savings $99.60, pay $149.40.
Coupon floor: $12 off a $10 item is invalid in simple math; discount cannot exceed price.
Extra 20% off a $50 marked-down price → $50 × 0.80 = $40 remaining.

FAQ

Can I use a fixed dollar amount instead of a percent?: Yes. Switch to fixed amount off and enter the coupon value in the same currency as the original price. The tool subtracts that amount from the starting price to produce the sale price and savings.
Why might the calculator reject my inputs?: A percent over 100% or a fixed discount larger than the original price does not produce a meaningful simple sale price above zero. Check the tag again or cap the discount at the item price.
Does this include sales tax?: Only if you include tax in the original price you enter. For apples-to-apples coupon comparisons, keep tax treatment the same for every scenario you run.
How do I compare two different coupons?: Hold the original price constant and change only the percent or fixed amount. The lower sale price (or higher savings) wins, all else equal—then confirm any exclusions or minimum spends on the coupon fine print.
How do I model “take an extra 15% off” clearance?: Treat the clearance sticker price as your new original, then apply 15% off that amount. Do not apply both percentages to the first list price unless the store wording says so.
Is a larger percent always better than a dollar coupon?: Not always. On a cheap item, a fixed $10 off can beat a modest percent; on an expensive item, a high percent usually wins. Run both numbers rather than guessing from the headline.
How should I treat buy-one-get-one or half-off offers?: Model the effective discount on the items you will actually pay for. Two equal-priced items with one half off is 25% off the pair’s combined list total. Unequal prices need the specific store rules.
What about shipping, fees, or rebates?: Those sit outside a simple price-minus-discount model. Add them after you know the sale merchandise total if you care about out-the-door cost.
Why does my receipt differ by a few cents?: Merchants may round each line, apply tax before or after coupons, or enforce catalog rounding. Use this tool for planning and verify the register total before you pay.
Can I reverse a discount to find the original price?: If you know the sale price and the percent off, original ≈ sale ÷ (1 − rate). Example: $80 after 20% off implies $80 ÷ 0.80 = $100 list. Confirm the markdown order if multiple deals applied.
Is this financial or shopping advice?: No. It is a math helper for estimating sale prices and savings. Store policies, stock levels, and return rules still decide whether a purchase makes sense for you.
Are my prices stored anywhere?: No. Discount math runs in your browser and is not uploaded as a shopping history.

Formula / Method

Percent off: sale = original × (1 − percent/100); savings = original − sale. Fixed off: sale = original − amount; savings = amount (when amount ≤ original). Effective percent off = (savings ÷ original) × 100. Reverse a known percent: original ≈ sale ÷ (1 − percent/100).

Assumptions & Limitations

Assumes a single discount applied to one original price unless you manually chain steps. Ignores tax ordering, loyalty points, shipping, and merchant-specific stacking rules. Invalid when the discount exceeds the price. Estimates only—the register total at checkout is authoritative.

Related guides

Percentages and Discounts: A Practical Guide
Learn percentage of, percent change, multi-discount stacking, tax, and tips—with worked dollar examples and free calculators.

Related tools

Last updated: 2026-07-13

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