CALQEVA · calqeva.com · Generated
Finance
Discount Calculator
Find the price after a discount, how much you save, and what a stacked offer really works out to. Useful when a sale advertises a percentage off plus an extra card discount.
How to use this calculator
- Enter the original price.
- Enter the advertised discount percentage.
- Add a second discount if the offer stacks, such as an extra bank or coupon discount.
Formula
Final price = Price × (1 − d₁/100) × (1 − d₂/100)
- Price
- original marked price
- d₁
- first discount percentage
- d₂
- additional discount percentage, if any
Savings are the original price minus the final price.
Worked example
A ₹2,999 item at 20% off, with an extra 10% card discount.
- After 20%2,999 × 0.80 = ₹2,399.20
- After extra 10%2,399.20 × 0.90 = ₹2,159.28
- Combined discount20 + 10 − (20 × 10 ÷ 100) = 28%
You pay ₹2,159.28 and save ₹839.72, which is 28% off rather than 30%.
Why stacked discounts are smaller than they look
A 50% discount followed by an extra 20% is not 70% off. The second discount applies to the already-reduced price, so the combined effect is 60% off. The calculator shows the true combined percentage so you can compare offers honestly.
The general rule: applying discounts of a% and b% in sequence gives a total reduction of a + b − (a × b ÷ 100).
Why 50% + 20% off is not 70% off
Sales often stack offers, such as flat 50% off plus an extra 20% at checkout. The second discount applies to the already-reduced price, not the original, so the total saving is smaller than the two percentages added together.
On a ₹1,000 item, 50% off brings it to ₹500, and 20% off that is ₹100 more, for a final price of ₹400. That is 60% off in total, not 70%. The general rule is: total discount = 1 − (1 − first) × (1 − second).
- 50% + 20% = 60% off in total
- 40% + 10% = 46% off in total
- 30% + 30% = 51% off in total
Flat ₹ off or a percentage off?
When one offer is a fixed amount and another is a percentage, the better choice depends on the price. ₹500 off beats 20% off for anything under ₹2,500, and 20% off wins above that. Divide the rupee amount by the percentage to find the break-even price: ₹500 ÷ 20% = ₹2,500.
Things to keep in mind
- Advertised prices in India usually include GST, so the discount normally applies to the inclusive price. Check the terms if the offer says otherwise.
- Card and coupon discounts often have a maximum cap, which this calculator does not apply.
Frequently asked questions
How do I calculate two discounts one after another?
Apply them in turn. For 50% then 20% on ₹1,000: ₹1,000 × 0.5 = ₹500, then ₹500 × 0.8 = ₹400. The combined discount is 60%, not 70%, because the second discount is taken from the reduced price.
Is 50% plus 20% the same as 70% off?
No. The second discount is calculated on the reduced price, so the combined discount is 60%. On a ₹1,000 item you pay ₹400, not ₹300.
Does it matter which discount is applied first?
No. Multiplying the two reductions gives the same final price in either order, though the intermediate figure on the bill will differ.
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