Discount Calculator
See what you save and what you pay after a discount and tax.
Verify this calculatorMaintained
See what the result uses—and what it cannot know.
Sumvoro calculates deterministically from the visible inputs. It does not invent lender terms, local rules, market values, medical facts, or professional judgments.
- 1 · InputsCheck every entered value against the latest statement, quote, measurement, or official source.
- 2 · Formula
Savings = original price × discount ÷ 100. Total = discounted price + tax on the discounted price, rounded to cents. - 3 · SensitivityUse Insights to run a lower and higher case. If the conclusion changes easily, collect better information or leave more margin.
- 4 · ScopeThis tool is maintained and covered by automated calculation tests. Provider timing, rounding, and omitted facts can still change a real-world result.
- Formula release
- 2026.10-r4
- Release date
- October 10, 2026
- Review status
- Maintained
- Source review
- September 12, 2026
Optional readingLearn how this calculator works
How the discount calculator works
Calculate a sale price, discount savings, and the final price after an entered sales-tax rate.
Savings = original price × discount ÷ 100. Total = discounted price + tax on the discounted price, rounded to cents.
Read our calculation methodology and limitations.
Example
A $120 item at 25% off saves $30. The discounted price is $90; with 7% tax, the total is $96.30.
What affects the result
- The discount applies to the original price.
- Tax is applied after the discount in this model.
- Shipping and additional discounts are not included.
Frequently asked questions
Can I calculate a price without tax?
Yes. Enter a sales-tax rate of 0%.
Do two discounts simply add together?
Not usually. Sequential discounts multiply: 20% off followed by 10% off leaves 72% of the original price, a 28% combined discount. This tool models one discount.