How to Calculate Discount Prices
Quick Answer
- Sale price = Original price × (1 - discount rate)
- Savings = Original price × discount rate
- Discount % = ((Original - Sale) ÷ Original) × 100
Example: 30% off a 1,200 INR shirt.
Sale price = 1,200 × 0.70 = 840 INR. Savings = 1,200 × 0.30 = 360 INR.
Use the free Discount Calculator on CalConvs for instant answers.
Quick Discount Reference Table
| Discount | Multiply by | Quick Guide |
|---|---|---|
| 5% off | 0.95 | Save 5 for every 100 spent |
| 10% off | 0.90 | Save 10 for every 100 spent |
| 20% off | 0.80 | Save 20 for every 100 spent |
| 25% off | 0.75 | Quarter off |
| 30% off | 0.70 | Save 30 for every 100 spent |
| 50% off | 0.50 | Half price |
| 75% off | 0.25 | Three quarters off |
Double Discounts and Stacked Discounts
When two discounts are applied one after another, they do not simply add together.
Example: A jacket is 40% off, then you have a further 20% coupon. This is NOT 60% off total.
- Apply 40% off to £100: Sale price = 100 × 0.60 = £60
- Apply 20% off to £60: Final price = 60 × 0.80 = £48
Total savings = £52. Effective discount = 52%. Not 60%.
Discount Shopping Context by Country
- United Kingdom: Black Friday (November), Boxing Day (26 December) and end-of-season sales in January and July. VAT (20%) is already included in advertised UK prices.
- United States: Black Friday, Cyber Monday and July 4th sales. Prices shown usually exclude sales tax, which is added at checkout.
- India: Big Billion Day (Flipkart), Great Indian Festival (Amazon), Diwali and Eid sales drive enormous discounts.
- Pakistan: Eid sales (Eid ul Fitr and Eid ul Adha), Independence Day (14 August). Online platforms like Daraz run major sale events.
- Australia: Black Friday, Boxing Day (26 December) and EOFY (End of Financial Year, June). GST of 10% is included in all advertised Australian prices.
Frequently Asked Questions
How do I calculate 20% off a price?
Multiply the original price by 0.80. For example, 20% off 350 AUD = 350 × 0.80 = 280 AUD. Quick mental shortcut: find 10% (move decimal left one place) and double it to get 20%, then subtract from original.
How do I find the original price before a discount?
Divide the sale price by (1 - discount rate). For example, if a final price of $60 was after a 25% discount: original price = 60 ÷ 0.75 = $80.
Is 30% off a good discount?
It depends on whether the original price was genuine. Some retailers inflate the original price before applying a discount. To evaluate a sale, compare the discounted price to prices at other retailers. Use the Percentage Change Calculator to verify the claimed discount percentage.
Related Tools
- Discount Calculator: sale price, savings and original price for any discount
- Percentage Calculator: any percentage of any number
- Percentage Change Calculator: verify if a claimed discount is accurate