About the Discount Calculator
A discount looks simple until a second offer, a coupon or GST is added on top. This calculator takes the original price and the discount percentage and shows the amount saved and the price the customer pays. It is useful both for shoppers checking an offer and for shop owners, distributors and online sellers deciding how much margin an offer will cost them.
You can add a second, stacked discount — the familiar 20% + 10% offer, or a trade discount followed by a cash discount. The second discount applies to the already reduced price, so the combined effect is 28%, not 30%. The tool shows this effective discount clearly, which helps when you compare a stacked offer against a single flat percentage.
If the sale is taxable, enter the GST rate and the tool adds tax on the discounted price, because GST is charged on the value after a discount that is shown on the invoice. All fields accept decimals, the results show paise where they matter, and an optional field left blank is simply ignored.
How to use it
- 1Enter the original price — the MRP or list price before any offer.
- 2Enter the discount percentage. For a stacked offer, put the second percentage in the optional field.
- 3If GST applies, enter the rate (for example 5 or 18) to see the tax and the final amount payable.
- 4Read the amount saved, the discounted price and the final price, with the step-by-step breakdown underneath.
How this is calculated
Discount amount = Price × Discount % ÷ 100 Price after discount = Price − Discount amount Stacked discounts: Price × (1 − d1 ÷ 100) × (1 − d2 ÷ 100) Effective discount % = [1 − (1 − d1 ÷ 100) × (1 − d2 ÷ 100)] × 100 Final price = Price after discount × (1 + GST % ÷ 100)
Frequently asked questions
How do I calculate a percentage discount on a price?
Multiply the price by the discount percentage and divide by 100 to get the saving, then subtract it from the price. For a ₹2,499 item at 20% off, the saving is ₹499.80 and the sale price is ₹1,999.20. The calculator does this instantly and shows paise so that invoices tally.
Is 20% + 10% the same as 30% off?
No. The second discount is applied to the price left after the first one. On ₹1,000, 20% off gives ₹800, and 10% off ₹800 gives ₹720 — an effective discount of 28%. Two stacked discounts are always slightly smaller than their sum, and the order in which they are applied does not change the result.
Is GST charged before or after the discount?
GST is generally charged on the transaction value after deducting a discount that is given at or before the time of sale and recorded on the invoice. Discounts given later are treated differently and usually need a prior agreement and credit notes. When in doubt about a particular scheme, check with your tax adviser.
How do I find the original price from the sale price?
Divide the sale price by one minus the discount rate. If an item costs ₹1,600 after a 20% discount, the original price is 1,600 ÷ 0.80 = ₹2,000. You can confirm it here by entering ₹2,000 and 20% and checking that the discounted price matches.
What is the difference between a trade discount and a cash discount?
A trade discount is a reduction from the list price given to dealers or bulk buyers and is shown on the invoice itself. A cash discount is an incentive for paying early, such as 2% off for payment within ten days. Both can be entered here as the first and second discounts.