What is a discount calculator?
Sale price = price × (1 − discount ÷ 100). For two discounts, apply the second to the already-reduced price: ₹2,499 with 40% + extra 10% off is ₹2,499 × 0.6 × 0.9 = ₹1,349.46, a total discount of 46%, not 50%.
Features
- Single or stacked discounts
- Amount saved and true total discount
- Optional GST on top for B2B quotes
How to use the discount calculator
- Enter the original price or MRP.
- Enter the discount, and any extra discount.
- Add GST only if the price excludes it.
Why 40% + 10% is not 50%
The extra 10% is taken from the price after the first 40%. On ₹1,000: 40% off leaves ₹600, and 10% of ₹600 is ₹60, leaving ₹540. That is a total of 46% off. Two discounts of a% and b% combine to 1 − (1 − a)(1 − b).
Frequently asked questions
How do I calculate 20% off?
Multiply the price by 0.8. ₹1,500 at 20% off is ₹1,200.
Does MRP include GST?
Yes. In India the MRP printed on goods includes all taxes, so do not add GST again.
Last updated 15 November 2026. Made by Criza Labs. Spotted a mistake? Tell us.
