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Last updated October 7, 2026
Calculations and guidance
Our calculators use standard formulas and our guides reflect common industry practice, but printers, mills and fabrics vary. Confirm specifications with your supplier and test with a strike-off before ordering production quantities.
Colour
Colours on screen differ from colours on fabric. Colour values shown by our tools (including CMYK approximations) are for reference only.
Affiliate links and advertising
Some pages may contain advertising or affiliate links. If you buy through an affiliate link we may earn a commission at no extra cost to you. This never affects which tools or methods we recommend.