Discount Calculator - Sale Price, Savings & Percentage Off
Find the real sale price and exactly what you save — including stacked coupons and VAT — or work backwards from two prices to the discount percentage.
= SAR 124.75 off
Stacked coupons apply to the already-reduced price.
What is a Discount Calculator?
A discount calculator answers two questions that look similar but run in opposite directions. Forwards: given an original price and a discount, what will I pay and what do I save? Backwards: given the original price and the sale price, what discount is that really? Shops advertise the first and rely on you not checking the second — which is where the interesting comparisons live.
Why Stacked Discounts Are Smaller Than They Look
"20% off, plus an extra 20% at checkout" is not 40% off. The second discount applies to the already-reduced price, so 100 becomes 80, then 64 — a total discount of 36%. The gap widens as the discounts get bigger: 50% plus 50% is 75% off, not free. This calculator applies the second discount correctly and shows you the effective total.
- Enter the discount as a percentage or a flat amount
- Stack a second checkout coupon and see the true effective discount
- Handle VAT-inclusive Saudi retail prices or add VAT on top
- Multiply across a quantity to see basket-level savings
- Reverse mode: get the discount percentage from two prices
- Switch between 20 currencies
Common Discount Calculator Use Cases
Sale Shopping
Check the final price before you reach the till.
Coupon Stacking
Work out what two discounts really add up to.
Offer Comparison
Compare "30% off" against "100 off" on equal terms.
Setting Promotions
Price a promotion without destroying your margin.
Black Friday
Verify whether the "was" price makes the deal real.
Bulk Orders
See the total saving across a multi-item purchase.
How to Calculate a Discount
- Enter the original price.
- Choose whether the discount is a percentage or a flat amount, and enter it.
- Add a second checkout discount if one applies.
- Leave "price includes VAT" checked for Saudi retail prices, or uncheck it to add VAT to the discounted amount.
- Read the final price, the saving and the effective discount percentage.
The Discount Formulas
Sale price = Original × (1 − Discount ÷ 100)
Discount % = (Original − Sale) ÷ Original × 100
Original price = Sale ÷ (1 − Discount ÷ 100)
Two stacked discounts = 1 − (1 − d₁) × (1 − d₂)
The last formula is the one worth memorising. It explains why 30% plus 20% is 44% off, and why no combination of discounts below 100% will ever give something away for free.
Discounts and VAT in Saudi Arabia
ZATCA requires consumer prices in Saudi Arabia to be displayed inclusive of the 15% VAT, so the price on the tag is already the gross amount. A discount therefore reduces the VAT-inclusive figure, and the VAT falls proportionally with it — there is nothing extra to add at checkout. That is why the "price includes VAT" option is on by default. Uncheck it only for business-to-business quotes, where prices are commonly quoted net.
Is a Bigger Percentage Always a Better Deal?
No — and this is where the reverse mode earns its place. A 50% discount on an inflated "was" price can leave you paying more than a 25% discount on a fairly priced item. Compare final prices, not percentages, and use the reverse calculator to check whether an advertised discount matches the actual gap between the two prices shown.
Who This Calculator Is For
- Shoppers hunting sales and comparing offers
- Retailers and e-commerce sellers designing promotions
- Procurement teams evaluating supplier discounts
- Sales staff quoting negotiated prices
- Anyone checking whether a "deal" is really a deal
❓ Frequently Asked Questions
How do I calculate a discounted price?
Multiply the original price by (1 − discount ÷ 100). A 25% discount on SAR 499 gives 499 × 0.75 = SAR 374.25.
How do I find the discount percentage from two prices?
Subtract the sale price from the original, divide by the original, and multiply by 100. From 499 down to 349 is a 30.06% discount.
How do stacked discounts work?
A second discount applies to the already-reduced price, not the original. 20% off followed by another 20% off is a 36% total discount, not 40%.
Do Saudi prices already include VAT?
Yes. Displayed retail prices in Saudi Arabia are VAT-inclusive, so the discount applies to the VAT-inclusive figure. Keep the 'price includes VAT' option checked for Saudi shopping.
What is the effective discount?
It is the total saving expressed as a percentage of the original price, which is the number that matters when you compare offers with different structures.
How do I calculate the original price from a sale price?
Divide the sale price by (1 − discount ÷ 100). A sale price of 300 after 25% off means the original was 300 ÷ 0.75 = 400.
Can I calculate savings across several items?
Yes. Enter a quantity and the calculator shows both the per-item price and the total price and saving for the whole basket.
Is a bigger percentage always the better deal?
Not always. Compare the final price, not just the percentage — a 50% discount on an inflated original can cost more than 30% off a fair price.
Does it handle amount-off discounts?
Yes. Switch the discount type to 'Amount off' to enter a flat value, and the calculator shows the equivalent percentage.
Is this discount calculator free?
Yes. It is completely free and runs entirely in your browser with nothing stored.