How this calculator helps
Stacked percent discounts are not additive. 20% then 10% is not 30% off the original; this calculator shows the true combined effect.
Formulafinal = price × (1 − d1/100) × (1 − d2/100)
Equivalent single discount
The tool also reports one equivalent percent off the original price that would land you on the same final number, which is useful for mental comparisons.