Discount Calculator
Price after discount · Find original MRP · Discount % · Multi-item bills · Updated June 2026
What price will I pay after the discount?
Selling price at every discount level - MRP ₹2,000.00
| Discount | You save | Selling price | Price bar |
|---|---|---|---|
| 5% off | −₹100.00 | ₹1,900.00 | |
| 10% off | −₹200.00 | ₹1,800.00 | |
| 15% off | −₹300.00 | ₹1,700.00 | |
| 20% off(selected) | −₹400.00 | ₹1,600.00 | |
| 25% off | −₹500.00 | ₹1,500.00 | |
| 30% off | −₹600.00 | ₹1,400.00 | |
| 40% off | −₹800.00 | ₹1,200.00 | |
| 50% off | −₹1,000.00 | ₹1,000.00 | |
| 60% off | −₹1,200.00 | ₹800.00 | |
| 70% off | −₹1,400.00 | ₹600.00 |
What is a Discount Calculator?
A discount calculator is a tool that instantly computes any of the three variables in a discount relationship - the original price (MRP), the discount percentage, or the final selling price - when you know the other two. Rather than doing the arithmetic manually (and risking errors in multi-step percentage calculations), a discount calculator gives you the exact answer in a fraction of a second.
In India, discount calculators are used across a wide range of situations: shoppers checking whether a Flipkart or Amazon "sale price" is a genuine saving; retailers working out what promotional price to advertise while protecting their margin; procurement teams comparing vendor quotes expressed as "X% off catalogue price"; and small business owners calculating how a flat discount on an invoice affects their net receivable after GST.
This calculator covers four distinct modes that cover every common discount scenario:
The most common use - enter the MRP and discount percentage to instantly see how much you will pay, how much you save, and (optionally) what the total comes to after adding GST at 5%, 12%, 18%, or 28%. A comparison table shows what you would pay across all common discount levels from 5% to 70% off.
When you only see the sale price and the '20% off' label - and want to verify what the item was originally priced at. This reverse-discount calculation is surprisingly tricky to do in your head (many people incorrectly add the discount % back to the sale price, which gives the wrong answer). The correct formula: MRP = Sale price ÷ (1 − Discount%).
When you know both the MRP and the selling price but the retailer hasn't labelled the discount clearly - or you want to verify that the advertised discount matches the actual price gap. Enter both prices and get the exact percentage off. Useful for price comparison across stores.
Add multiple items - each with its own MRP, discount percentage, and quantity - and get a complete bill summary: line-level discounted price, total MRP, total discount amount, average discount across all items, and the final amount payable. Useful for retail billing, event procurement, or comparing quotes from suppliers.
Three essential discount formulas - with worked examples
All discount calculations flow from a single relationship: Selling price = MRP × (1 − Discount% ÷ 100). Rearranging this formula gives you the other two variants. Here is each formula with a clear numerical example:
Discount reference table - selling price for a ₹2,000 MRP
The table below is useful for quickly benchmarking how much any given discount percentage actually saves on a ₹2,000 item. You can scale these proportionally for any MRP - a ₹10,000 item with 20% off saves 5× as much as shown (₹2,000 instead of ₹400).
| Discount | Saving (₹) | You pay |
|---|---|---|
| 5% off | −₹100.00 | ₹1,900.00 |
| 10% off | −₹200.00 | ₹1,800.00 |
| 15% off | −₹300.00 | ₹1,700.00 |
| 20% off | −₹400.00 | ₹1,600.00 |
| 25% off | −₹500.00 | ₹1,500.00 |
| 30% off | −₹600.00 | ₹1,400.00 |
| 40% off | −₹800.00 | ₹1,200.00 |
| 50% off | −₹1,000.00 | ₹1,000.00 |
| 60% off | −₹1,200.00 | ₹800.00 |
| 70% off | −₹1,400.00 | ₹600.00 |
MRP used: ₹2,000. Scale proportionally for other MRPs.
How successive discounts work - the maths that catches everyone out
One of the most common mistakes in discount arithmetic is treating successive discounts as additive. A 20% discount followed by an additional 10% discount is not 30% off - it is only 28% off. The reason is that the second discount applies to the already-reduced price, not the original MRP.
The formula for the effective single discount equivalent of two successive discounts d₁ and d₂ is:
This matters in real-world shopping because Indian e-commerce sites and retailers regularly stack discounts: a product discount, a bank card offer, a coupon code, and a loyalty cashback - each applied sequentially. The table below shows the effective combined discount for common stacking scenarios:
| First discount | Second discount | Naïve total | Actual effective discount | Difference |
|---|---|---|---|---|
| 10% off | then 10% off | 20% | 19.0% | −1.0pp less than expected |
| 20% off | then 10% off | 30% | 28.0% | −2.0pp less than expected |
| 20% off | then 20% off | 40% | 36.0% | −4.0pp less than expected |
| 30% off | then 10% off | 40% | 37.0% | −3.0pp less than expected |
| 50% off | then 20% off | 70% | 60.0% | −10.0pp less than expected |
Practical implication: When a retailer offers "20% off + extra 10% with HDFC card", the effective saving is 28%, not 30%. On a ₹10,000 item, this is ₹2,800 off - not ₹3,000. Being aware of this prevents overestimating your actual savings.
GST and discounts in India - how they interact
Under India's GST framework, tax is charged on the transaction value - the actual price paid by the buyer after discount, not on the MRP. This is governed by Section 15 of the CGST Act 2017. So if a product with MRP ₹1,000 is sold at a 20% discount for ₹800, GST is calculated on ₹800, not ₹1,000.
There is one important caveat: if the discount is given after the sale (e.g., a post-sale cashback or deferred rebate not known at the time of supply), GST may have already been charged on the pre-discount price. Only discounts that are agreed upon before or at the time of supply and shown on the invoice can reduce the GST base. This is particularly relevant for B2B transactions and distributor schemes.
Essential food items, some medicines, small restaurants
Processed foods, computers, business-class air travel
Most consumer goods, electronics, restaurants, hotels
Luxury goods, automobiles, tobacco, cement, large TVs
Common discount calculation mistakes - and how to avoid them
If a product sells for ₹800 after a 20% discount, many people calculate MRP as ₹800 + 20% = ₹960. This is wrong. The correct formula is ₹800 ÷ (1 − 0.20) = ₹800 ÷ 0.80 = ₹1,000. Adding 20% back gives the wrong MRP because the 20% was taken off ₹1,000 (the MRP), not off ₹800 (the sale price). Use the 'Find original MRP' mode in this calculator to get the correct answer instantly.
As explained above, a 30% product discount plus a 15% bank offer does NOT equal 45% off. The actual effective discount = 1 − (0.70 × 0.85) = 1 − 0.595 = 40.5% off. On a ₹5,000 item this is ₹2,025 savings, not ₹2,250. The error seems small on small purchases but adds up significantly in bulk/B2B procurement.
Retailers must distinguish between these two. If an item costs ₹600 to procure and the MRP is ₹1,000, a 30% discount on MRP brings the selling price to ₹700 - still profitable at ₹100 above cost. A 40% discount on MRP = ₹600 selling price = breakeven. A 45% discount on MRP = ₹550 = selling at a ₹50 loss. If someone offers you '50% off cost price', that is a completely different (and much better) deal than '50% off MRP'.
Indian e-commerce platforms have faced regulatory scrutiny for inflating the 'MRP' or 'original price' shown on product pages before applying a discount, making the deal appear more attractive. The actual street price or typical selling price was already lower than the 'original' shown. To avoid being misled, check the product's price history using browser extensions, compare across platforms, and assess whether the 'discounted' price is genuinely below the market rate - not just below an artificially inflated MRP.
Discount calculators for retailers and small businesses
For retailers and business owners, discounting decisions involve a careful balance between driving sales volume and protecting margin. Here are the key calculations every retailer should know:
Before setting a discount, know your gross margin: Gross margin % = (Selling price − Cost price) ÷ Selling price × 100. This is your maximum discount before selling at a loss. If your gross margin is 35%, you can offer up to 35% discount and break even - anything above and you lose money on each unit. Most healthy retail categories target 25–50% gross margin, leaving room for promotional discounts of 10–20% while remaining profitable.
When running a discount promotion, the question isn't just 'will I cover costs?' - it's 'will I sell enough extra units to offset the margin erosion?' If your margin drops from 30% to 15% with a 15% discount, you need to sell 2× as many units just to achieve the same total gross profit. The break-even additional volume = original margin % ÷ (original margin % − new margin %) − 1. For 30% → 15%: 30% ÷ 15% − 1 = 100% more units needed.
B2B trade discounts are typically structured as 'X% off catalogue price' for different customer tiers (distributor, dealer, retailer, end customer). A common structure might be 40% off catalogue for distributors, 30% for dealers, 20% for retailers. These are sequential in the supply chain, not stacked on a single transaction - each party transacts at their tier price and earns margin on their own discount. The multi-item bill calculator above is useful for generating quick price lists across tiers.