Measure twice, make once
Measurement converter
Convert common craft lengths between metric and imperial units.
The page shows its formula, example, assumptions, rounding, and limitations beside the calculator.
Measurement converter
Convert common craft lengths between metric and imperial units.
Formula and assumptions
Length conversions use exact standard factors before the displayed value is rounded.
Worked example
Example: 100 centimetres displays as about 39.4 inches at practical precision; the optional detail control shows 39.3701.
Limits and rounding
Results are planning estimates from the values entered. Displayed decimals are rounded for craft use; whole materials and repeats round up where the method says so. Confirm gauge, material behavior, construction, and finished measurements before committing supplies.