Shoppers
Check that a 'flat 40% + extra 10%' tag really adds up.
Discount Calculator
Enter the original price and the discount to see what you pay and what you save.
Your files stay with you. Your files never leave your browser. This tool runs on your device: nothing is uploaded to our servers, so there is nothing for us to store or see.
How to use it
- Enter the original price.
- Enter the discount percent, an extra discount and GST if any, or switch to sale price mode.
- Read the price you pay and the savings.
Where it helps
Shop owners
Set sale prices and see the GST-inclusive figure for the label.
Online sellers
Plan festival offers without cutting too deep into margin.
Good to know
Stays in your browser
Numbers you type are worked out on your device and never sent to our servers.
Discounts don't add up
Each one is taken on the price left after the last.
GST after discount
GST is charged on the discounted transaction value.
Questions people ask
How do you calculate a sale price after a discount and GST?
Enter the original price and the discount. Add an extra discount and GST if they apply. The tool shows what you pay, what you save and the effective discount. A second discount comes off the already reduced price, so 30% then 10% is 37%, not 40%. Switch modes to find the discount from a sale price.
- 2 Discounts stacked. Second on the reduced price.
- 37% 30% then 10%. Not 40%.
- +GST On the final price. Optional.
- Reverse From sale price. Find the discount %.
Do two discounts add up?
No. The second discount is taken off the already reduced price. A 30% discount followed by an extra 10% is 37% overall, not 40%. On a ₹1,000 item you pay ₹630, not ₹600. The tool shows the effective discount so you can see exactly what a stacked offer is worth.
Is GST added before or after the discount?
After. GST is charged on the transaction value, which is the price after any discount shown on the invoice. The tool adds GST to the final discounted price. So a ₹1,000 item at 20% off with 18% GST costs ₹800 plus ₹144 GST, which is ₹944.
How do I find the discount from the sale price?
Switch to 'The sale price', then enter the original price and the price you're being charged. The tool shows the discount as a percentage and the saving in rupees. A shirt cut from ₹1,499 to ₹999 is about 33% off, a ₹500 saving on the tag price.
How do I calculate a percentage discount by hand?
Multiply the price by the discount percentage and divide by 100 to get the saving, then subtract it from the price. 25% off ₹2,400 is a saving of ₹600, so you pay ₹1,800. A quick shortcut is to multiply by 0.75 for 25% off, or by 0.6 for 40% off.
Why is 'flat 50% + extra 20%' not 70% off?
Because the extra 20% is taken on the price that's already been halved. On ₹2,000, half off leaves ₹1,000, and 20% off that leaves ₹800. That's 60% off overall. Retailers know '50 + 20' sounds bigger, so it's worth checking the real figure here. The effective discount line shows the true figure.
How should a shop set a sale price?
Start from the price you want customers to see, then check that it still covers your cost with some margin. Use the profit margin calculator alongside this one. A discount that leaves less than your costs only brings in buyers at a loss, unless it's a deliberate clearance.
Can I show the GST-inclusive price on a label?
Yes. Enter the original price before GST, the discount and the GST rate. 'Total payable' is the GST-inclusive price you can print on the label. Retail labels in India must show the maximum retail price including all taxes, so check that MRP rules are followed.
What if the sale price is higher than the original?
Then it isn't a discount but a price rise. The tool says so rather than showing a negative discount. It sometimes happens when a 'was' price isn't the real earlier price. If you're a shopper, checking the price history on the seller's site is worth the effort.
Can I calculate a discount for a whole bill?
Yes. Enter the bill total as the original price and the discount as a percentage. For a flat rupee discount, such as ₹200 off a ₹1,600 bill, use the percentage calculator to turn it into a percentage first. ₹200 off ₹1,600 is 12.5%. Then enter that percentage here with any GST.
What is the difference between discount and markdown?
In everyday shopping they mean the same thing: a cut from the listed price. Businesses sometimes use 'markdown' for a permanent price cut on slow stock and 'discount' for a short offer or a deal for one customer. The maths is the same in both cases.
How do I compare two offers?
Work out the final price for each with this tool, including GST and any delivery charge, and compare the rupee amounts. '40% off' on a higher price can still cost more than '25% off' elsewhere. The amount you actually pay is what matters, not the size of the percentage.
Does the tool round the price?
It shows amounts to the paisa. Shops and invoices usually round to the nearest rupee. If you're printing labels, round in a way that suits your pricing, such as ending in 9 or 0. Keep the GST amount on the invoice accurate to the paisa.
Is anything I enter stored?
No. The calculation happens in your browser, and the prices never reach our servers. There's no sign-up and nothing is saved after you close the page. You can plan your own sale prices or check offers privately and as often as you like. Close the tab and the prices are gone.
Does it work on a phone?
Yes. It fits a phone screen and the number keypad opens for each price. Shoppers use it in store to check stacked offers, and shop owners use it at the counter to answer 'what's the price after discount?' without reaching for a separate calculator. No app or sign-up is needed.
Is the discount calculator free?
Yes, free with no sign-up and no limit. It's one of the free converters and calculators from Marketiism. Shops on Marketiism can also run offers, coupons and GST billing, and send sale announcements to customers on WhatsApp. The calculator itself needs no account and has no limit on use.
Want this inside your own account?
Marketiism keeps your invoice numbers, GST reports, UPI payment links and WhatsApp reminders in one place. Leave your details and we'll call to set it up for your business, or start the trial yourself.
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