Markup and margin are not the same thing — a 20% markup is only a 16.7% margin. Check your numbers both ways.
Results
Formulas
Markup % = profit ÷ cost × 100
Margin % = profit ÷ sell × 100
Sell for target margin = cost ÷ (1 − margin %)
Doing this for a real job? Fieldlink turns takeoffs into estimates, quotes and job budgets — with rates you can reuse.
See civil estimating