Budgeting & Income
Discount Calculator
Work out a sale price in seconds. Enter the original price and the percent off to see what you'll pay and what you save. Add a second coupon to see how stacked discounts really combine — 20% then 10% off is 28% off, not 30%.
Formula shown below · Tested against worked examplesHow we verify
A second discount applied to the already-reduced price.
You pay: $60
You pay
$60
Sale price after the discount.
- You save
- $20
- Effective discount
- 25%
Total off the original once both discounts apply.
Compare scenariosTry three values of one input
| Original price | |||
|---|---|---|---|
| You pay | $54 | $60+$6 | $66+$12 |
| You save | $18 | $20+$2 | $22+$4 |
Every other input stays at the value you set above — currently $80 for original price. Differences are measured against the first column.
Saved scenariosSave this calculation
Saved in this browser only — no account, and nothing is sent to us. Clearing your browser data deletes them.
How this calculator works
Sale price = original × (1 − discount). A second coupon is applied to that reduced price, so the two discounts compound rather than sum. The effective discount is total savings divided by the original price.
This is the price math only — it doesn't add sales tax, which is applied to the discounted price at checkout. Use the Sales Tax calculator to see the final out-the-door total.
Formula
Sale price = P × (1 − d)
Saved = P × d
Stacked: P × (1 − d₁) × (1 − d₂)- P
- Original price
- d
- Discount, as a decimal
Stacked discounts multiply rather than add: 30% then 20% is 44% off, not 50%, because the second applies to the already-reduced price.
What this assumes
- A single discount applied to the price entered. Stacked discounts multiply rather than add, which produces a smaller total than intuition suggests.
- Sales tax is calculated on the discounted price in most jurisdictions, which is why the saving is slightly larger than the headline.
- It does not judge whether the purchase was worth making at either price.
What changes this number
- Percentage off
- The relationship is linear, which makes this the simplest calculation on the site — and the easiest to get wrong mentally.
- Stacking
- 30% then 20% is 44% off, not 50%. The second discount applies to the already-reduced price.
- The original price
- Worth checking rather than accepting. A discount from an inflated reference price is not a saving.
A worked example
Take the 25% off $80 scenario. These figures are produced by the calculator above, not written alongside it, so they always match what the tool returns.
What you enter
- Original price
- $80
- Discount
- 25%
What it returns
- You pay
- $60
- You save
- $20
- Effective discount
- 25%
Sources
This calculator uses no external data — the result follows entirely from the formula above and the values you enter, so there is nothing to cite beyond the arithmetic.
Calculator last reviewed August 9, 2026. How we verify
Try an example
Frequently asked questions
How do I calculate a discount?
Multiply the original price by the discount percentage to get the amount off, then subtract it. A 25% discount on $80 is $80 × 0.25 = $20 off, so you pay $60. This calculator does both steps and shows the savings and the price you'll actually pay.
Do stacked discounts add together?
No — they multiply. An extra 10% off an item already 20% off isn't 30% off. The first cut takes $100 to $80, then 10% off $80 is $8, so you pay $72 — a 28% effective discount. Stacked coupons always save a little less than the two percentages added together.
How do I find the original price from a sale price?
Divide the sale price by (1 minus the discount). If an item is $60 after 25% off, the original was $60 ÷ 0.75 = $80. Reversing a discount this way is handy for checking whether a 'sale' price is really a deal.
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Disclaimer: DayCents provides this calculator for educational purposes only. Results are estimates based on your inputs and the stated assumptions — they are not financial advice, a quote, or an offer of credit. Consult a qualified financial professional before making major money decisions.