Discount Calculator
Get the sale price and the savings from a percent off, find the percent from two prices, and stack two discounts to see the real total. Add sales tax after the discount if you want the price at the register.
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Added to the price after the discount.
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The calculation runs in your browser and ParrotNotes does not store your numbers. They sit in the page address so you can bookmark or share the result.
How a discount is calculated
Sale price = price × (1 − percent off ÷ 100). 25% off $80 is $80 × 0.75 = $60, and the savings are $80 − $60 = $20. If you only want the savings, multiply the price by the percent as a decimal: $80 × 0.25 = $20.
For quick sums in a shop: 10% off is the price with the decimal point moved one place left ($80 becomes $8 off), 20% is double that, 5% is half of it, and 25% is a quarter of the price.
Worked examples
15% off $49.99: $49.99 × 0.15 = $7.50 off (7.4985 rounded), so you pay $42.49. 30% off $1,250: $375 off, you pay $875. 40% off $35: $14 off, you pay $21.
With tax: 25% off $80 is $60, and 8.25% sales tax on $60 adds $4.95, so the total is $64.95. The calculator adds tax to the price after the discount; leave the tax field empty to see the price before tax.
Percent off from two prices
If a tag shows the original and the sale price but not the percent, work it backwards: (original − sale price) ÷ original × 100. A $120 jacket at $90 is $30 ÷ $120 = 25% off. A $79 item at $59 is $20 ÷ $79 = 25.32% off.
Divide by the original price. Dividing by the sale price ($30 ÷ $90 = 33.33%) gives the markup from the sale price back up to the original, which is a different number and a common mistake on price tags and in quotes.
Stacked discounts: why 20% + 10% is not 30%
When two discounts apply, the second comes off the price that is already reduced. On $100, 20% off leaves $80; 10% off $80 is $8, so you pay $72. That is 28% off in total, not 30%. The rule: total discount = 1 − (1 − first) × (1 − second), here 1 − 0.8 × 0.9 = 0.28.
The gap grows with bigger discounts: 50% then 20% is 60% off, not 70%, and 50% + 20% + 10% is 64%, not 80%. The order does not matter, so "extra 10% off sale prices" and "20% off after the coupon" end at the same price. Use the Stacked discounts mode to see each step.
Discounts in B2B quotes
Reps meet the same arithmetic on quotes: a distributor discount off list, then a volume discount, then an early payment discount. Stack them in the calculator to see the net price and the true total discount before you put it in writing, rather than adding the percents in your head.
A discount comes straight out of margin. On an item with a 30% margin, 10% off the price cuts the gross profit by a third. Before you agree to a number on a call, check what it leaves you with in the margin calculator's discount check, and ask what the buyer gives in return: a larger order, a longer contract or faster payment.
Check what a discount does to your profit with the margin calculator, or compare pack sizes and supplier quotes with the unit price calculator.
Before the pricing conversation: Handling price objections, What a wholesale sales rep does, RFQ template.
The discount is one number. The call behind it is the rest.
Why the buyer asked for the discount, what they agreed to in return and the next step are said on the call. ParrotNotes records the conversation (with permission), writes the summary and pulls out the terms and follow-ups.
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