Discount Calculator

Calculate the final price after any discount, or find what percentage off a sale represents.

📖 What is a Discount Calculator?

A discount calculator helps you quickly determine the final price after a percentage discount, the discount percentage implied by a price reduction, or the original price behind a sale price. It's one of the most practically useful everyday calculators - relevant every time you see a "30% off" tag in a shop or online sale.

Understanding discounts helps you make smarter purchasing decisions. When two competing stores advertise different discount amounts and different original prices, quickly finding the actual sale price helps you compare. When a sale says "was ₹3,499, now ₹2,449," this calculator instantly tells you the true percentage off (29.9%) and your exact savings (₹1,050).

This calculator supports three modes: Find Sale Price (most common - what do I pay?), Find Discount % (what percentage is this sale?), and Find Original Price (if I know the sale price and discount, what was it before?).

One important nuance: stacked discounts do not add linearly. If a shop offers 20% off and then an additional 10% off at checkout, the total saving is not 30% - it's 28%. The first discount reduces the base, and the second discount applies to the already-reduced price.

📐 Formula

Sale Price = Original Price × (1 − Discount% ÷ 100)

Savings = Original Price − Sale Price

Discount% = (Original − Sale) ÷ Original × 100

Original Price = Sale Price ÷ (1 − Discount% ÷ 100)

📖 How to Use This Calculator

Select the mode: Find Sale Price, Find Discount %, or Find Original Price.

Enter the known values in the fields.

Click Calculate - all four values (sale price, savings, discount %, original) are shown.

💡 Example Calculations

Example 1 - 25% off ₹3,200 jacket

Sale price = 3,200 × (1 − 0.25) = 3,200 × 0.75 = ₹2,400

You save: ₹800 (25%)

Try this example →

Example 2 - Find discount %: was ₹4,999, now ₹3,499

Discount % = (4,999 − 3,499) ÷ 4,999 × 100 = 1,500 ÷ 4,999 × 100 = 30.01%

Try this example →

Frequently Asked Questions

How do I calculate the price after a discount?+

Sale Price = Original Price × (1 − Discount% ÷ 100). For example, 30% off ₹2,000: Sale Price = 2,000 × (1 − 0.30) = 2,000 × 0.70 = ₹1,400. You save ₹600.

How do I calculate the discount percentage?+

Discount% = (Original Price − Sale Price) ÷ Original Price × 100. Example: Original ₹1,500, Sale ₹1,050. Discount = (1,500 − 1,050) ÷ 1,500 × 100 = 450 ÷ 1,500 × 100 = 30% off.

How do I find the original price if I know the sale price and discount?+

Original Price = Sale Price ÷ (1 − Discount% ÷ 100). For example, if a ₹700 item is 30% off: Original = 700 ÷ 0.70 = ₹1,000.

What is a stacked discount?+

A stacked (or sequential) discount applies two or more discounts one after the other. First discount reduces the price, then the second discount applies to the already-discounted price. Example: 20% then 10% off: if original is ₹1,000, after 20% = ₹800, after 10% on ₹800 = ₹720. Total saving = ₹280 = 28%, not 30%.

Is GST included in the discounted price?+

In India, GST is applied after the discount. So if an item is ₹2,000 pre-GST and gets a 20% discount: Discounted price = ₹1,600. Then GST (say 18%) is applied on ₹1,600: GST = ₹288. Final price = ₹1,888. Use the GST Calculator for these calculations.

How do you calculate 30% off a price?+

To calculate 30% off: multiply the original price by 0.30 to find the discount amount, then subtract from the original price. Formula: sale price = original price x (1 - 0.30) = original price x 0.70. Example: 30% off Rs 1,500 = 1,500 x 0.70 = Rs 1,050. The discount amount = 1,500 x 0.30 = Rs 450. For any percentage off: sale price = original x (1 - discount%/100).

How do you find the original price when you know the sale price and discount?+

To find the original price: original price = sale price / (1 - discount%/100). Example: an item is on sale for Rs 840 after a 30% discount. Original price = 840 / (1 - 0.30) = 840 / 0.70 = Rs 1,200. Verify: 30% off 1,200 = 1,200 x 0.70 = 840. This reverse calculation is useful when you see a sale price and want to know what the original price was.

How do I calculate the discount percentage if I know original and sale price?+

Discount percentage = ((Original Price - Sale Price) / Original Price) x 100. Example: if an item was $80 and is now $60, the discount is ((80 - 60) / 80) x 100 = 25%. This formula works for any currency. If you have the sale price and discount percentage but need the original price, use: Original Price = Sale Price / (1 - discount% / 100). This calculator handles all these variations automatically.

What is the rule for calculating a percentage discount mentally?+

To find 10% quickly, move the decimal one place left. For 20%, double the 10%. For 5%, halve the 10%. For 15%, add 10% + 5%. Example: 25% off Rs 840 = (10% = 84) + (10% = 84) + (5% = 42) = Rs 210 discount, giving Rs 630 final price. This mental math works for most store discounts without a calculator.

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📌 Quick Tips

💡When comparing '30% off' vs 'Buy 2 get 1 free' - the latter is 33.3% off per item if you buy exactly 3. The percentage deal wins only if you need fewer than 3.

💡Stacked discounts don't add - they multiply. A 20% discount then a 10% discount = 1 − (0.80 × 0.90) = 28% total off, not 30%.

💡Before calculating the discount, check whether the 'original price' shown is the genuine pre-sale price or an inflated reference price used to exaggerate savings.