Discount Impact Calculator
Find out how many more units you need to sell after a discount to make the same gross profit, and what you lose if sales don't rise.
- Free
- No sign-up to try
- Works as you type
Discount impact on profit
Profit per unit after the discount
$10.00
Units needed for the same profit
1,000
Extra sales needed
100.0%
Profit if sales stay the same
$5,000
- Profit per unit after the discount = price × (1 − discount) − cost.
- Units needed = units now × full-price profit per unit ÷ discounted profit per unit.
- Extra sales = units needed ÷ units now − 1.
Free, no sign-up to try. Save it as a live calculator you can share; an estimate from the numbers you enter, not financial advice. Check the result against your own records before you rely on it.
How it works
How the Discount Impact Calculator works
- 1
Enter your numbers
Every result updates as you type, with the formula shown under it.
- 2
Check the method
See how each number is worked out and what it assumes.
- 3
Save it as a Room
Share a live calculator: others can change the numbers and see the result update.
Worked example
What it makes
Example inputs
- Full price
- $50
- Cost per unit
- $30
- Discount
- 20 %
- Units you sell now at full price
- 500
Results
- Profit per unit after the discount
- $10.00
- Units needed for the same profit
- 1,000
- Extra sales needed
- 100.0%
- Profit if sales stay the same
- $5,000
How it's calculated
- Profit per unit after the discount = price × (1 − discount) − cost.
- Units needed = units now × full-price profit per unit ÷ discounted profit per unit.
- Extra sales = units needed ÷ units now − 1.
- Assumes: Every unit sold is discounted, and cost per unit stays the same.
- Assumes: If the discounted price is at or below cost, no volume makes up the profit: shown as n/a.
An estimate from the numbers you enter, not financial advice. Check the result against your own records before you rely on it.
Who it's for
Who uses it
Store owners
Check a sale's maths before you run it.
Ecommerce marketers
Show why a 20% discount can need twice the sales.
Pricing managers
Compare discount depths on the same basis.
Good to know
What to consider
- Every unit sold is assumed to be discounted.
- If the discounted price is at or below cost, no extra volume recovers the profit.
Questions
About the Discount Impact Calculator
Why does a small discount need so many extra sales?
The discount comes straight out of profit, not price. On a $50 item that costs $30, a 20% discount halves profit per unit from $20 to $10, so you need twice the sales.
Can I share the calculator with my team or a client?
Yes. The Room keeps the calculator live: anyone with the link can change the numbers and see the result update, with the method and assumptions on the same page.
Make your calculator now
Free, no sign-up to try. It becomes a Room you can edit, publish and share.
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