Core formulas
The formulas to keep straight
markup = profit / costmargin = profit / selling pricemargin from markup = markup / (1 + markup)markup from margin = margin / (1 - margin)How do you convert markup to margin?
To convert markup to margin, divide markup by one plus markup. A 50% markup becomes 50% / 150%, or 33.3% margin.
To convert margin to markup, divide margin by one minus margin. A 40% margin becomes 40% / 60%, or 66.7% markup.
Formula math in this guide was checked July 3, 2026.
Markup and margin conversion table, checked July 3, 2026
| Markup | Margin | What it means |
|---|---|---|
| 10% | 9.1% | Small cost-plus add |
| 25% | 20.0% | Common light markup |
| 50% | 33.3% | Not a 50% margin |
| 66.7% | 40.0% | Needed for 40% margin |
| 100% | 50.0% | Double cost equals 50% margin |
How do cost and price show markup and margin?
Cost and price show the difference clearly. If cost is $40 and selling price is $60, profit is $20. That $20 is half of cost, but only one-third of price.
That is why the same sale has 50% markup and 33.3% margin. Both numbers are true. They answer different questions.
For final pricing, margin is usually better because fees, discounts, and ads all come out of the selling price.
Cost and price example, checked July 3, 2026
| Line | Amount | Formula |
|---|---|---|
| Cost | $40 | Given |
| Selling price | $60 | Given |
| Profit | $20 | $60 - $40 |
| Markup | 50% | $20 / $40 |
| Margin | 33.3% | $20 / $60 |
Should sellers use markup or margin?
Sellers should use margin for final pricing because margin shows how much of each sale is left after cost. Markup is useful for quick quotes, but it can make profit look larger than it is.
If a product has marketplace fees, shipping subsidies, discounts, returns, or ads, margin gives the cleaner decision.
My rule: use markup to build a rough quote, then use margin to approve the final price.
- Use margin for published prices.
- Use markup for quick cost-plus checks.
- Convert before discussing profit with a partner.
- Recheck margin after discounts or fees.
Decision table
Markup or margin decision table, checked July 3, 2026
| Task | Use | Reason |
|---|---|---|
| Publish a product price | Margin | Fees and discounts hit revenue |
| Quote from a supplier cost | Markup | Fast cost-plus math |
| Check business health | Margin | Shows share of sales kept |
| Explain a price change | Both | Shows cost and revenue views |
Worked examples
Examples you can compare against your own numbers
Example: $40 cost sold for $60
This is the classic markup vs margin confusion.
| Cost | $40.00 | |
|---|---|---|
| Price | $60.00 | |
| Profit | $20.00 | |
| Markup | 50% | |
| Margin | 33.3% |
Takeaway: The product did not keep half the sale. It kept one-third of the sale.
Open this example in the markup margin converterAction checklist
Before you use this number in the real business
- 1Enter cost and price.
- 2Check markup and margin side by side.
- 3Use target margin for final pricing.
- 4Recheck after adding fees.
- 5Recheck after discounts.
Common mistakes
Mistakes that make the answer look better than reality
FAQs
Questions people ask before making the decision
How do you convert markup to margin?
Use markup divided by one plus markup. A 50% markup converts to 33.3% margin.
How do you convert margin to markup?
Use margin divided by one minus margin. A 40% margin converts to 66.7% markup.
Is 100% markup the same as 100% margin?
No. 100% markup means double cost, which is 50% margin.
Which is better for ecommerce pricing?
Margin is better because ecommerce fees, discounts, and ads come out of selling price.
Can markup still be useful?
Yes. Markup is useful for fast cost-plus quotes and internal cost checks.
Sources and notes
Where the assumptions come from
Reference definition for gross margin and gross profit.
General cost, margin, fee, and pricing workflow used in these examples.
How FeeProofed checks formulas, examples, source notes, and calculator-backed guide content.