$100 less 20% and 10% extra
- Total savings before tax
- $28.00
- Effective discount
- 28%
- Subtotal after discounts
- $72.00
- Tax amount
- $3.60
Discount Calculator
Use this free discount calculator to estimate sale price, stacked discounts, total savings, effective discount percentage, tax amount, and final price.
Formula steps Estimate limits shown Examples included Private history
Formula steps
- Apply the first discount to the original price.
- Apply the extra discount to the already-discounted subtotal.
- Add tax to the discounted subtotal if a tax rate is entered.
How to use the discount calculator
- Enter the requested dollar amounts, rates, terms, tax settings, or contribution details.
- Use rates as percentages, such as 6.5 for 6.5%, and check whether a field asks for a monthly or annual amount.
- Press the calculate button to see the answer, supporting metrics, and formula steps.
- Use the result as a planning estimate only, then copy it if the assumptions look right.
Common uses
Calculate a sale price after a discount.
Check stacked coupon math.
Estimate tax after discounts.
Compare total savings before buying.
Examples
Final price and savings
Discounted price
Final checkout estimate
Frequently asked questions
Plain-language answers about when to use the estimate, what your numbers mean, what is left out, and how privacy works.
When should I use the Discount Calculator?
Use it for early planning and side-by-side comparisons, especially for tasks like these: Calculate a sale price after a discount. Check stacked coupon math. Treat the answer as a planning estimate, not a final quote.
What is the Discount Calculator doing with my numbers?
In plain language: The calculator applies the first discount to the original price, applies the extra discount to the reduced subtotal, then adds tax if a tax rate is entered. If the result seems too high or too low, first check whether each field expects a monthly amount, annual amount, dollar value, or percent.
What does this estimate leave out?
This does not check coupon exclusions, minimum purchases, shipping, store policy, tax exemptions, or local tax rules. Real finance decisions can also depend on fees, timing, local rules, credit details, and provider-specific terms.
Does the site save my finance inputs?
No. The calculator runs in your browser tab. Recent answers stay only on the page while you use it, and they are not sent to a server.