Discount Calculator for Sale Prices and Savings
This discount calculator instantly shows the sale price, the amount you save, and the effective discount percentage from any original price. It is built for shoppers comparing deals, anyone checking a percent-off promotion, and people who want the exact final price before they reach the register.
The tricky cases are handled for you too. Stack several discounts in sequence (a 20% sale plus an extra 10% is 28% off, not 30%), work backward to find the discount percentage between two prices, or add tax on top of the discounted amount. Prices follow your currency automatically.
How to Calculate a Discount
Enter the original price
Type the item's full price into the Original Price field. The currency symbol and number format follow your language setting automatically.
Choose the discount
Tap a preset from 5% to 75%, or type a Custom percentage or a fixed amount off. The sale price, savings, and effective percentage update instantly.
Stack or add tax (optional)
Click Add Discount to apply more discounts in sequence, or toggle Add Tax to include a tax rate on the discounted price.
Or find the discount %
Switch to the Find Discount % tab, enter the original and sale prices, and the calculator reveals the exact percentage off and how much you save.
Features
Instant Sale Price
Enter a price and discount to see the sale price, amount saved, and effective discount percentage in real time.
Quick Preset Buttons
Apply 8 common discount levels with one tap: 5%, 10%, 15%, 20%, 25%, 30%, 50%, and 75%.
Custom Discount
Need an exact figure? Enter any custom percentage or a fixed amount off instead of a preset.
Stacked Discounts
Chain multiple discounts, such as a store sale plus a member coupon. Each one applies to the already-reduced price.
Find Discount % Mode
Work in reverse: enter the original and sale prices to discover the actual discount percentage between them.
Optional Tax
Toggle a tax rate to add it on top of the discounted price, with the tax amount shown separately.
Step-by-Step Breakdown
When you stack discounts, a breakdown shows exactly how each step reduces the price.
Visual Savings Bar
A proportional bar shows how much you pay versus how much you save, so the impact is easy to read at a glance.
Automatic Currency
The currency symbol and number format match your locale, and you can switch currency from the picker.
One-Tap Reset
Clear every field, discount, and tax setting at once to start a fresh calculation.
Frequently Asked Questions
How do I calculate a discount?
Enter the original price, then pick a preset percentage or type your own custom percentage or amount. The calculator multiplies the price by the discount to find the savings and subtracts it to show the sale price, all instantly.
What is the sale price formula?
Sale price = Original Price × (1 − Discount % / 100). For example, a $200 item at 25% off becomes 200 × 0.75 = $150. The calculator handles this for you and also shows the exact amount saved.
How do I find the percent off between two prices?
Switch to Find Discount % mode and enter both the original and sale prices. The discount is calculated as (Original Price − Sale Price) / Original Price × 100. A $200 item selling for $150 is a 25% discount.
How do stacked discounts work, and why isn't 20% + 10% the same as 30%?
Stacked discounts apply in sequence, each to the already-reduced price. On a $100 item, 20% off gives $80, then 10% off the $80 gives $72. That is a 28% effective discount, not 30%, because the second discount is calculated on $80 rather than the original $100.
Is tax applied before or after the discount?
After. The calculator first reduces the price by the discount, then adds the tax rate to the discounted amount. The result shows the included tax separately so you can see exactly what makes up the final price.
Which currency does the calculator use?
It detects a currency from your language setting and formats every amount with the matching symbol and number style. You can also switch to a different currency from the picker at any time.
Is my data stored anywhere?
No. All calculations happen entirely in your browser. No prices or results are sent to a server or saved anywhere.
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