Discount Calculator
Work out the final sale price and money saved from any discount percentage, including stacked double discounts like an extra 10% off an already reduced price.
What is the Discount Calculator?
The ByteTools Discount Calculator turns an original price and a discount percentage into the final price you pay and the exact amount you save.
- Instant final price and amount saved
- Optional stacked second discount for combined offers
- Shows the true effective discount percentage
- Handles decimal prices and percentages
- 100% private — runs entirely in your browser
- Free, no sign-up, mobile friendly
How to use the Discount Calculator
- 1
Enter the original price of the item.
- 2
Enter the discount percentage (for example 25 for 25% off).
- 3
Optionally tick “Add a second discount” and enter the extra percentage applied after the first.
- 4
Read the final price, total amount saved and effective overall discount instantly.
About the Discount Calculator
The ByteTools Discount Calculator turns an original price and a discount percentage into the final price you pay and the exact amount you save. Enable the optional second discount to model stacked offers such as “40% off, plus an extra 10% at checkout” — which is not the same as 50% off.
It is handy for shoppers comparing sale prices, retailers setting markdowns, and marketplace sellers checking their margins after promotional codes. The effective combined discount is shown so you always know the true reduction.
All math runs locally in your browser. Prices are never sent anywhere, results update on every keystroke, and the tool is completely free with no account required.
Frequently asked questions
How do I calculate a discount price?
Multiply the original price by the discount percent and divide by 100 to get the saving, then subtract it from the original price. A $80 item at 25% off saves $20, so the sale price is $60.
Is 40% off plus an extra 10% the same as 50% off?
No. Stacked discounts multiply rather than add. 40% off $100 leaves $60, and 10% off that leaves $54 — an effective 46% discount, not 50%. This calculator computes stacked discounts correctly.
How do I work out the original price before a discount?
Divide the sale price by (1 − discount ÷ 100). If you paid $54 after 40% off, the original price was 54 ÷ 0.60 = $90. You can verify any pair of values by entering them here.
How much is 30 percent off?
30% off means you pay 70% of the original price. For a $150 item that is $105, saving $45. Enter any price and 30 in the discount field to get the exact figure.
Does the calculator include sales tax?
No — it works with pre-tax prices. Tax is normally applied to the discounted price at checkout, so calculate your discount here first, then use the GST or VAT calculator to add tax if needed.
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