Metric to Imperial Converter
Convert the full metric length scale — micrometers to megameters — against thou, inches, feet, yards, and miles, all live.
Metric
Imperial
Type into any field — every other field updates instantly, metric or imperial. A thou (or "mil") is one thousandth of an inch, the usual unit for machining tolerances.
About the Metric to Imperial Converter
Built for a shop floor converting a print's millimeter dimension against an imperial tool or tolerance, or anyone else who needs more range than a basic length converter. Type into any field — micrometers, millimeters, centimeters, meters, kilometers, or megameters on the metric side, thou, inches, feet, yards, or miles on the imperial side — and every other field updates immediately.
All eleven units convert through the same base (meters), so there's nothing to look up: set a millimeter dimension and read the equivalent straight off in thou or inches, or go the other way from an imperial tolerance back to millimeters.
Frequently asked questions
What is a thou, and how does it relate to an inch?
A thou (also called a mil) is one thousandth of an inch — 0.001 in, or 0.0254 mm. It is the standard unit for machining tolerances, where a fraction of an inch is too coarse to work with.
How do I convert millimeters to inches?
Divide the millimeter value by 25.4. For example, 25.4 mm is exactly 1 inch. Type the millimeter value into the converter above and read the inches field for anything in between.
What is a megameter?
A megameter (Mm) is one million meters, or 1,000 kilometers — included here so the metric side covers its full common range, from micrometers up to megameters, in one tool.
How many micrometers are in a millimeter?
There are 1,000 micrometers in a millimeter, and 25,400 micrometers in an inch.