Discount calculator
Apply successive discounts and a fixed coupon to compare the final price and savings. Change the inputs to update the chart or diagram.
Your inputs
The editable example is illustrative. Enter your own dimensions, operating data, prices, and fees. Results update as you edit.
Calculations run in your browser. Inputs are not saved or sent to analytics.
How it works
- Final price = max(0, × Π(1 − ÷ 100) − )
- Worked example: 100 × 0.8 × 0.9 = 72; 72 − 5 = 67
- Supported input limits: : 0 ≤ x ≤ 1,000,000,000,000; Entries: 1–5; : 0 ≤ x ≤ 1,000,000,000,000
Input and formula key
Your result
Complete the inputs to see your result.
Assumptions and limitations
Discounts apply successively to the remaining price, then the fixed coupon is deducted. Two percentage discounts do not add together. The final price cannot fall below zero; taxes and delivery are excluded.
Sources
- OpenStax — sales tax, commission and discounts Sources reviewed: 2026-10-06
