Percent Off Calculator
You are looking at a price tag. It says 30% off. You need to know what you actually pay — not approximately, but exactly — before you decide whether to buy. Mental maths is unreliable under pressure and a standard calculator requires three separate steps.
This free percent off calculator does it in one. Enter the original price and the percent off — the sale price, saving amount and step-by-step solution appear instantly.
How to Calculate Percent Off
The formula every percent off calculator uses:
Saving = Original price × (Percent off ÷ 100) Sale price = Original price − Saving
Example: A jacket costs $120 and is 30% off.
- Saving = $120 × 0.30 = $36
- Sale price = $120 − $36 = $84
Percent Off Quick Reference Table
Common percent off results for a $100 item:
Percent off |
You save |
You pay |
|---|---|---|
|
5% off |
$5.00 |
$95.00 |
|
10% off |
$10.00 |
$90.00 |
|
15% off |
$15.00 |
$85.00 |
|
20% off |
$20.00 |
$80.00 |
|
25% off |
$25.00 |
$75.00 |
|
30% off |
$30.00 |
$70.00 |
|
40% off |
$40.00 |
$60.00 |
|
50% off |
$50.00 |
$50.00 |
|
60% off |
$60.00 |
$40.00 |
|
70% off |
$70.00 |
$30.00 |
|
75% off |
$75.00 |
$25.00 |
For other prices scale proportionally. 30% off $240 = double the $120 result = $72 saving, $168 final price.
Mental Maths — Quick Percent Off Shortcuts
When you need a rough figure fast:
10% off — move the decimal point one place left. 10% off $350 = $35 saving, you pay $315.
20% off — find 10% then double it. 20% off $350 = $70 saving, you pay $280.
25% off — divide the price by 4. 25% off $200 = $50 saving, you pay $150.
50% off — divide the price by 2. 50% off $180 = $90 saving, you pay $90.
5% off — find 10% then halve it. 5% off $80 = $4 saving, you pay $76.
15% off — find 10%, find 5%, add them. 10% of $60 is $6, 5% is $3, total saving = $9, you pay $51.
Is the Sale Price Always What You Pay?
Not always. Several situations can affect the final amount at checkout:
Sales tax — in the US, sales tax is added at checkout and varies by state. If the displayed price excludes tax the final amount will be higher than the percent off calculator result. In the UK, VAT is included in displayed prices so the percent off applies to the VAT-inclusive amount — no extra tax added at checkout.
Stacked discounts — combining a 20% off discount with an additional 10% off voucher does not equal 30% off. The second discount applies to the already-reduced price, giving 28% off total. For stacked deals apply each discount sequentially — run the percent off calculator twice, using the first sale price as the starting price for the second discount.
Minimum spend conditions — some percentage discounts only apply above a certain basket value. Check the terms before calculating.
Rounded checkout prices — retailers sometimes round discounted prices slightly at checkout, particularly on amounts ending in .99.
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Frequently Asked Questions
About This Percent Off Calculator
This percent off calculator is part of CalcDaysTime — a free suite of date, time and maths tools. All calculations run entirely in your browser. No data is collected, stored or shared.
Disclaimer: Results are calculated based on the figures you enter. Tax, fees and retailer-specific terms are not included. Always verify the final price at checkout. CalcDaysTime accepts no liability for errors or omissions in results produced by this calculator.