How this calculator works
Markup adds a percentage of acquisition or production cost to that cost. This tool allows a reduction as a negative markup, with -100% leaving a zero price. It excludes tax and overhead allocations. Enter the cost basis you intend to use and round the final outputs only.
Formula
Markup amount = C × m; selling price = C × (1+m). C is unit cost and m is markup as a fraction. Markup is measured against cost rather than the selling price.
Worked example
A unit costing $80 with 25% markup has $20 added and sells for $100 before tax. A -50% markup on the same cost subtracts $40 and gives a $40 selling price.
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Frequently asked questions
Does 25% markup mean a 25% margin?
No. At $80 cost and $100 selling price, $20 profit is 25% of cost but 20% of revenue. Use the margin calculator to measure the revenue share.
Can a zero-cost item have a markup amount?
A percentage of $0 is $0, so both outputs remain $0. This tool does not add a fixed-dollar charge.
What happens at exactly -100% markup?
The selling price is zero and the markup amount equals the negative of the cost. Values below -100% are rejected.