Discount Calculator
Calculate the final price after discount, the discount amount, or find the original price from a sale price.
About the Discount Calculator
Discounts are everywhere in India - from Diwali Big Billion Day sales to pharmacy promotions - but the math is frequently misleading. A '70% discount' can be calculated on an artificially inflated MRP that nobody ever paid. A 40% discount on a product with a 400% markup still leaves the seller with a healthy margin. The headline number tells you nothing about whether you are getting genuinely good value.
The mathematics of stacked discounts confuses most shoppers. If a shirt is first discounted 20%, then an additional 10% bank discount is applied, the total is not 30% off - it is 28% off. The second discount applies to the already-reduced price, not the original. This is why brands advertise 'flat 50% off + additional 30% off' knowing that most buyers will mentally add them to 80% rather than multiply to 65%. Use the three calculation modes here to see through any discount structure.
GST complicates things further. All Indian MRPs include GST, which ranges from 5% to 40% depending on the product category (after the GST 2.0 reform). When a retailer offers 20% off MRP, that discount is on the GST-inclusive price. Your actual pre-tax saving is slightly smaller. For big purchases like electronics (18% GST) or luxury items (40% GST), this gap between headline discount and effective pre-tax saving can be material.
Discount Calculation
Final price = Original x (1 - Discount/100) - Savings = Original x Discount/100 - Original from sale price = Sale price / (1 - Discount/100)
Multiple discounts are multiplicative, not additive: 20% then 10% off = 1 - (0.8 x 0.9) = 28% total (not 30%) - Markup vs discount: 50% markup means selling at 1.5x cost; 50% discount from that price = original cost only
Worked Example
₹8,000 mobile with 25% discount plus additional 10% bank offer
After 25%: ₹6,000 - After additional 10%: ₹5,400 - Total effective discount: 32.5% (not 35%) - Total saving: ₹2,600
Tips & Insights
- 1
Sale prices on e-commerce platforms often use inflated MRP as the base - verify whether the product is available at the 'original' price on the brand website or in physical stores before assuming the discount is real.
- 2
Successive discounts multiply, not add. A 50% off followed by 50% off is not free - it is 75% off (0.5 x 0.5 = 0.25 remaining). Always calculate the effective single discount to compare offers accurately.
- 3
Use the 'Find Original Price' mode to reverse-engineer any sale. If you see a product at ₹799 with '20% off', the calculator tells you the supposed original was ₹998.75 - check if that price was ever real.
- 4
GST at 18% on electronics (the standard rate after GST 2.0) means the pre-tax discount is smaller than advertised. On a ₹10,000 phone with 18% GST, the base price is ₹8,474. A '20% discount' saves you ₹1,695 on the pre-tax base, not ₹2,000.
- 5
Bank card offers (HDFC, ICICI, Axis) during Big Billion Day and similar sales often have a maximum discount cap of ₹1,500-₹2,000. The '10% off' headline can be misleading on high-value purchases where the cap applies much earlier.
- 6
Cashback offers are hidden discounts. A 5% cashback on ₹5,000 is equivalent to a 5% discount - but cashback often has conditions like minimum spend, monthly caps, or credit to wallet rather than bank account. Factor these in when comparing.
- 7
Festival sales often use a FOMO (fear of missing out) window of 48-72 hours. Price trackers like Camelcamelcamel (Amazon) or historical charts on Flipkart show whether the 'sale price' is actually lower than the typical selling price in the preceding months.
Why this matters for you
India's festival e-commerce sales - Big Billion Day, Amazon Great Indian Festival, Myntra EORS - now generate over ₹50,000 crore in revenue across a few days. The majority of that spending is driven by discount psychology rather than genuine value assessment. Buyers who can quickly calculate effective discount, stacked discount, and pre-GST savings make purchasing decisions based on data rather than excitement.
The 'original price' game is the most common retail manipulation in India. Brands establish a high MRP they never sell at, run a 60-70% discount to that inflated price, and create the illusion of extraordinary value. The reverse discount calculator - 'Find Original Price' mode - is the antidote: it shows you what the real original price must have been for a given sale price and discount. If the resulting number is implausibly high, the discount is manufactured.
For big-ticket purchases like appliances, electronics, and furniture, the difference between a genuine 30% discount and an inflated-base 50% discount can be ₹5,000-₹20,000. Over a lifetime of consumer purchases, buyers who consistently evaluate discounts correctly save lakhs compared to those who respond to headline percentages. This calculator takes 10 seconds to use and pays for itself on the first significant purchase you verify.
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Frequently Asked Questions
How do I calculate a discount?+
Discount Amount = Original Price × Discount Rate ÷ 100. Final Price = Original Price − Discount Amount. Example: ₹1,000 with 30% off → ₹300 off → ₹700 final price.
How do I find the original price from a sale price?+
Original Price = Sale Price ÷ (1 − Discount Rate ÷ 100). Example: ₹700 after 30% off → Original = ₹700 ÷ 0.70 = ₹1,000.
How do I calculate successive discounts?+
Successive discounts are not additive. A 20% discount followed by another 10% gives: 1 − (0.80 × 0.90) = 1 − 0.72 = 28% effective discount, not 30%.
What is a flat discount vs percentage discount?+
A flat discount is a fixed amount off (₹200 off). A percentage discount is a proportion of the price (20% off). For expensive items, percentage discounts save more; for cheap items, flat discounts can be better value.
How do I calculate effective discount when multiple discounts are combined?+
Multiple discounts are NOT simply added together. A 20% discount followed by an additional 10% discount gives a combined discount of 28%, not 30%. Formula: Effective discount = 1 - (1 - 0.20) x (1 - 0.10) = 1 - 0.72 = 28%. In retail, this is common during sales: 30% off with extra 20% off actually gives 44% off, not 50% off. On a Rs. 1,000 item: after 30% off = Rs. 700, after 20% off on Rs. 700 = Rs. 560. Effective discount is Rs. 440 on Rs. 1,000 = 44%, not 50%.
How do GST and discounts interact?+
In India, most listed prices are GST-inclusive. When a discount is applied to a GST-inclusive MRP, the discount reduces both the base price and the tax proportionally. Example: item listed at Rs. 1,180 (includes 18% GST). Base = Rs. 1,180 / 1.18 = Rs. 1,000. GST = Rs. 180. A 10% discount gives final price of Rs. 1,062, which breaks down as Rs. 900 base + Rs. 162 GST. Discounts advertised during Diwali or Amazon sales are applied to the MRP (which is already GST-inclusive) - there is no additional GST added on top of the discounted price. Use the 'Find original price' mode if you need to reverse-calculate the pre-GST amount.
What does MRP mean and how does it relate to discounts?+
MRP (Maximum Retail Price) is the highest price at which a product can legally be sold in India, printed on every packaged good. It is set by the manufacturer and includes all taxes. Retailers cannot charge above MRP but can sell below it. When an e-commerce site shows '40% off on MRP', the discount is computed from the MRP. MRP minus discount amount equals sale price. The MRP system was introduced to protect consumers from price gouging, but it can be gamed by setting an artificially high MRP and advertising a large 'discount' to create false value perception. Always use unit price comparison for packaged goods to verify whether the discounted price is genuinely good value.