Discount & Margin Calculator

Runs in your browserCalculators#Business

Sale prices with stacked discounts, profit margin and markup, and prices for a target margin, with GST.

Original price

Discount

Extra discount (optional)

Taken off the reduced price: 50% + 20% = 60% off.

GSTTurn on to split GST out of the prices or add it on top.

You pay₹1,000

You save₹1,000

Effective discount50%

Original price: ₹2,000
Discount (50%): −₹1,000
Price after discount: ₹1,000

How to use, limits & privacy

About Discount & Margin Calculator

Work out sale prices, profit margins and selling prices, with GST if you need it. The Discount mode handles a percentage or a flat rupee discount plus an extra discount on top, and shows what you pay, what you save and the effective discount. Margin & markup turns a cost and a selling price into profit, margin and markup, and Price for a margin finds the selling price for the margin you want. It is useful for shoppers checking offers and for shop owners pricing stock, and it runs in your browser.

How to Use

Choose what to calculate

Pick Discount, Margin & markup, or Price for a margin at the top.

Enter the prices

Type the price and discount (switch between % and ₹), or the cost and selling price, or the cost and the margin you want. An extra discount is optional.

Add GST if needed

Turn on GST, pick 0%, 5%, 18% or 40% (or a custom rate), and say whether the prices you entered include GST.

Read and copy the result

The main figures appear below with a line-by-line breakdown. Press Copy summary to share it.

Privacy & Processing

Mode: local
Files Leave Browser: Local tool processing; review details below
Max Input Size: Device memory limits
Account Required: No
Data Stored Locally: Nothing is saved; the example values return when you reload the page.
Network Processing: Assets or models may require an initial download

All calculations happen in your browser. Prices and costs are not sent to any server.

Rules & Limitations

Discounts must be between 0% and 100%, and a flat discount can't be more than the price.
An extra discount is taken off the already reduced price, so 50% plus an extra 20% is 60% off, not 70%.
Margin shows n/a when the selling price is 0, and markup shows n/a when the cost is 0.
With GST-inclusive prices, profit, margin and markup are worked out on the prices before GST. The same GST rate is assumed for the cost and the selling price.
GST slabs changed on 22 Sep 2025: most items are now at 5% or 18%, with 40% for luxury and sin goods. Use Custom for other rates, such as 3% on gold.

Top Suggestions

Checking the real discount on a sale with an extra bank or app offer
Pricing products to earn a target margin
Splitting the GST out of an MRP or adding GST to a quote
Comparing margin and markup for a shop or reseller business

Discount & Margin Calculator FAQ

How do I calculate a discount?

Multiply the price by the discount percentage and divide by 100, then subtract that from the price. ₹2,000 with 25% off is 2,000 - 500 = ₹1,500.

Is 50% off plus an extra 20% off the same as 70% off?

No. The extra 20% is taken off the reduced price, so ₹2,000 becomes ₹1,000 and then ₹800. You save ₹1,200, which is 60% off.

How do I calculate a GST-inclusive price?

Multiply the price before GST by 1 plus the rate: ₹1,000 with 18% GST is ₹1,180. To go the other way, divide the inclusive price by 1.18. Turn on GST here to see both.

What is the difference between margin and markup?

Both use the same profit. Margin is profit as a share of the selling price, and markup is profit as a share of the cost. Buying at ₹800 and selling at ₹1,000 is a 20% margin and a 25% markup.

How do I find the selling price for a target margin?

Divide the cost by 1 minus the margin. For a 25% margin on a ₹800 cost, that is 800 ÷ 0.75 = ₹1,066.67. Use the Price for a margin mode.

Is my data uploaded?

No. The calculator runs in your browser and nothing you type is sent anywhere or saved.