FizzyTools
Double discount calculator
Stack two or more discounts and see the real % off in total. Free, and your numbers never leave your device.
How it works
- 1Pick your questionSale price, % off, stacked coupons, deals, basket.
- 2Type the price and the offerThe answer appears as you type, to the cent, with the sums.
- 3Copy or shareCopy the answer or the receipt, or a link that opens the same sum.
How it's worked out
- A discount
- price × % ÷ 100, rounded to the cent. You pay the price minus the discount, so the two always add up.
- % off between two prices
- (was − now) ÷ was × 100
- Price before a discount
- paid ÷ (100 − %) × 100, or paid + the amount off
- Stacked discounts
- each one comes off the price left after the one before, in the order typed
- “Up to” and minimum spend
- the discount stops at the cap; below the minimum there's no discount
- Cashback
- worked out on what you pay after discounts, before tax, and paid back later
- Tax
- the % you type, on the price after every discount, as its own line
- Multi-buy deals
- in each full group of “buy X get Y”, the last Y items are free or discounted
- Basket
- a % off is on the line; an amount off is per item; the coupon is on the subtotal
Sources: the definition of percent; discounts on the running price, as stores apply them. Each line is rounded once, half away from zero.
Questions
How do double discounts work?
The second discount comes off the price left after the first. 20% then 15% off $279: $279 − $55.80 = $223.20, then − $33.48 = $189.72, which is 32% off in total.
Can I add a third discount?
Yes. Add up to 10 discounts in a row, each a % or an amount off, with an "up to" limit on any % discount.
How do I calculate a discount?
Multiply the price by the percentage and divide by 100. 30% off $79.99 is 79.99 × 30 ÷ 100 = $24.00 off (rounded to the cent), so you pay $55.99.
How do I work out what percent off something is?
Take the new price from the old one, divide by the old price and multiply by 100. $120 down to $84 is 36 ÷ 120 × 100 = 30% off.
How do I find the original price from the sale price?
After 30% off you paid 70% of the original. Divide what you paid by 70 and multiply by 100: $63 ÷ 70 × 100 = $90. Adding 30% to $63 gives $81.90, which is wrong.
Does the order of coupons matter?
Only when a % and an amount mix. $100 with 20% off then $10 off is $70; $10 off first then 20% off is $72. The store decides the order, so the calculator shows both.
What does “60% off up to ₹150” mean?
The discount is 60%, but it can't be more than ₹150. On ₹499, 60% would be ₹299.40, so you get ₹150 off and pay ₹349, which is 30.06% off.
Is buy 2 get 1 free the same as 33% off?
Only if you buy all three: you pay for 2 of 3 items, 33.3̅% off. Buy two and you get nothing off.
Is tax added before or after the discount?
Usually after: tax is worked out on the discounted price. Some places tax the price before a coupon, so check your receipt. If the price already includes tax, leave tax off.
Is cashback the same as a discount?
No. You pay the full discounted price now and get the cashback later, so the calculator shows both “pay now” and “after cashback”.
Are my numbers sent anywhere?
No. Everything is worked out in your browser. A shared link carries the numbers after a #, a part of the link that browsers don't send to servers, and never your item names. A discount is worked out from the price you type: if a “was” price looks high, compare it with other shops.