Interest & Basics
Discount Calculator
Calculate price after discounts
About the Discount calculator
Free Discount Calculator to calculate final price after applying percentage discounts and taxes. Calculate multiple discounts, additional offers, and tax calculations for shopping, sales, and business pricing decisions.
How the maths works
Discount Calculation Formula
Final Price = (Original Price - Discount) + Tax- Final Price
- Price after applying discounts and adding taxes
- Original Price
- Initial price before any discounts
- Discount
- Amount reduced from original price (percentage-based)
- Tax
- Additional charges applied on discounted price
A worked example
Shopping Discount Example
| Original Price | ₹1,000 |
| Discount | 20% + 5% additional |
| Tax | 18% GST |
Final Price: ₹944, Savings: ₹240
How to use it
- Enter the original price of the item
- Add primary discount percentage
- Include additional discounts if applicable
- Add tax percentage if required
- Get final price and total savings
What it accounts for
- Calculate single and multiple discounts
- Apply additional discount offers
- Include tax calculations
- Show total savings amount
- Display savings percentage
Why it is worth working out
- Smart shopping decisions
- Compare different offers
- Calculate actual savings
- Business pricing strategies
Questions people ask
How do I calculate a discount quickly?
Final price is the original multiplied by (100 minus the discount percentage) divided by 100. For 30% off ₹2,400: ₹2,400 × 0.70 = ₹1,680. To go the other way, divide the final price by the original and subtract from one.
Why do stacked discounts add up to less than they look?
Because the second discount applies to the already-reduced price. "50% off, then an extra 20% off" is 60% off in total, not 70% — ₹1,000 becomes ₹500, then ₹400. Stacked offers are designed to read as the larger number.
Is "buy one get one free" a 50% discount?
Only if you wanted two. As a per-unit price it is 50% off; as an amount spent it is twice what one costs. The offer works by converting a discount into a volume increase, which is why it is so common on perishables.
How do I compare offers on different pack sizes?
Reduce everything to price per unit — per gram, per millilitre, per piece. Larger packs are usually but not always cheaper per unit, and the exceptions are placed deliberately.
Read more on this
- How discounts are designed to make you spend more — A discount is a pricing tool, not a gift. Five mechanics that reliably increase total spending, and the two questions that defuse all of them.
This calculator is for information and education. It is not financial advice — see the disclaimer.