Discount Calculator
Enter the original price, then pick whichever you know — the discount % or the sale price.
How Discount Calculator Works
This calculator works either direction on a discount: give it the original price and a discount percentage to find the sale price and how much you save, or give it the original price and the sale price to find out what discount percentage that actually represents.
Formula & Method
In "I know the discount %" mode: savings = original × (discount% ÷ 100), then sale price = original − savings. In "I know the sale price" mode it works backwards: savings = original − sale price, then discount% = (savings ÷ original) × 100. If the sale price you enter is actually higher than the original price, savings comes out negative and the tool labels the result a "Markup Percentage" instead of a discount, showing the extra amount paid rather than an amount saved.
Worked Example
For an original price of ₹2,000 with a 20% discount: savings = 2,000 × 0.20 = ₹400, so the sale price is ₹2,000 − ₹400 = ₹1,600. Working it the other way, entering a sale price of ₹1,600 against the same ₹2,000 original gives savings of ₹400 and a discount percentage of (400 ÷ 2,000) × 100 = 20%, confirming both modes agree.
Frequently Asked Questions
- What happens if the "sale price" I enter is higher than the original price?
- The calculator detects that savings would be negative and switches the label from "Discount Percentage" to "Markup Percentage," showing the extra amount paid instead of an amount saved -- useful for checking a price increase rather than a discount.
- Does stacking two discounts add up the way I'd expect?
- No -- two discounts applied in sequence (e.g. 20% off, then another 10% off the reduced price) are not the same as a single 30% discount, because the second discount is calculated on the already-lower price. You'd need to run this calculator twice, once for each discount step, to see the true combined effect.
- Can I use this for percentage-off deals shown as a fraction, like "1/3 off"?
- Yes -- just convert the fraction to a percentage first (1/3 off is about 33.33%) and enter that in the Discount (%) field; the calculator works the same regardless of how the original deal was advertised.
- Why might my calculated discount percentage not match the percentage on the store's tag?
- Retailers sometimes round their advertised discount up or down, or calculate it against a "regular" price that differs slightly from what you actually paid before the discount -- this calculator gives the exact percentage based on the two numbers you enter.