Discount Calculator
Find the final price after a discount, or the discount % from the price you paid.
Last updated: August 2026
You save
₹200.00
20% off ₹1,000.00
Final price
₹800.00
How it works
Discount = price × (discount% ÷ 100). Final = price − discount. With GST: total = final + final × (GST% ÷ 100).
Example: ₹1,000 at 20% off → save ₹200, pay ₹800. With 18% GST → ₹944.
Frequently Asked Questions
How do I calculate the price after a discount?
Multiply the original price by the discount percentage and subtract the result. For a ₹1,000 item at 20% off, you save ₹200 and pay ₹800.
How do I find the discount percentage?
Divide the amount you saved by the original price and multiply by 100. If you paid ₹750 for something priced at ₹1,000, you saved ₹250, which is a 25% discount.
Should GST be added before or after the discount?
In India, GST is charged on the discounted (net) price, so the discount is applied first and tax is calculated on the reduced amount. This matches how retail invoices are usually raised.
What is the difference between discount and GST?
A discount reduces the selling price; GST is a tax added to it. On a ₹1,000 item with 20% off and 18% GST, you pay ₹800, then ₹144 GST, for a total of ₹944.
Why does stacking two discounts save less than the sum?
Each discount applies to the already-reduced price. A 50% off plus 10% off does not mean 60% off — the second 10% applies to the halved price, giving about 55% off in total.