Business & SaaS
Markup ↔ Margin Calculator
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How to use it
Using the markup ↔ margin calculator
- 01
Pick the direction
Choose which percentage you already know: markup on cost, or margin on price.
- 02
Enter the known percentage
Use the figure from your quote, spreadsheet or supplier sheet.
- 03
Optionally anchor an amount
Add a unit cost or selling price to see the actual dollars behind the conversion.
Good to know
Where the confusion costs money
Suppose you want to earn a 40% margin and your cost is $60. Guessing “add 40%” yields $84; a real margin of just 28.6%. The correct answer is $100, because a 40% margin requires a 66.7% markup. Teams that standardize on margins internally but buy based on markups (or vice versa) leak margin on every misread contract.
Quick mental anchors
- 25% markup ≈ 20% margin.
- 50% markup = 33.3% margin.
- 100% markup = 50% margin; the famous “keystone” retail rule.
Notice margin is always smaller than markup for the same transaction; if your two numbers disagree about which is bigger, they were measured on different bases.
How it's calculated
The math behind this calculator
Margin = Markup / (1 + Markup) Markup = Margin / (1 − Margin)Markup divides profit by cost; margin divides the same profit by selling price. Because cost plus markup equals price, the two are linked by the algebra above; never by subtracting or adding a fixed amount. The conversion works identically in reverse, which is why one input field serves both directions.
Assumptions & limitations
- Percentages refer to a single product’s unit economics.
- The optional amount anchors the conversion to real prices for context.
- Margins of 100% or more cannot exist; selling at zero margin-free price is impossible.
Worked example
A 50% markup on a $100 unit cost means selling at $150; which is only a 33.33% gross margin on that price.
FAQ
Frequently asked questions
- Which should my business use?
- Finance teams prefer margin because it maps to income statements; buyers and merchandisers traditionally use markup. Know both, and always ask which basis a quoted percentage uses.
- Can margin exceed 100%?
- Never; a 100% margin would mean acquiring goods for free. If a calculation suggests otherwise, the percentage was actually a markup.
- Does this work for services?
- Yes. Treat contractor or delivery cost as “cost” and your client fee as the selling price; the algebra is identical.
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