SpectraFree calculator
Margin and markup are not interchangeable.
Enter a cost and either your selling price or a markup percentage. The calculation is visible, rounded to two decimals and stays in your browser.
Runs in this browser only. Nothing you enter is sent to Spectra.
Worked fixture and limits
The example is £250 cost and £400 selling price: £150 gross profit, 37.5% margin and 60% markup. Currency figures are GBP and percentages are rounded to two decimals. A zero cost needs a positive price or markup; negative values and a zero selling price are rejected.
Read the sign estimating guide for scope, allowances and revisions.