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Length and Area

miltoch

Convert mils (mil) to chains (ch).

Factor1 mil = 1.262626e-6 ch

Converter

mil

Accepts numbers or expressions, e.g. 150 + 14.7

Result
1.26263ch

Rendered to 6 significant figures.

Formula

Formula
ch = mil × 1.262626e-6

Multiply any value in mils by 1.262626e-6 to obtain the value in chains.

Worked example

Convert 1.00000e+6 mil to ch.

  1. 01Start with 1.00000e+6 mil.
  2. 02Multiply by the conversion factor: 1.00000e+6 × 1.262626e-6 = 1.26263 ch.
Result1.00000e+6 mil = 1.26263 ch

Conversion table

milch
11.2626e-6
22.5253e-6
56.3131e-6
101.2626e-5
202.5253e-5
506.3131e-5
1000.00012626
2000.00025253
5000.00063131
10000.0012626

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from mil to ch?
1 mil equals 1.262626e-6 ch. To convert, multiply the value in mils by 1.262626e-6.
How do I convert 1 mil to ch?
1 mil = 1.26263e-6 ch. For any value, multiply by 1.262626e-6.
How do I convert ch back to mil?
Divide by the same factor — or equivalently, multiply by 792000. So 1 ch = 792000 mil.
When would I need to convert mil (thousandth of an inch) to chain (Gunter's chain)?
Length conversions appear in piping, layout, and mechanical drawings — particularly when reconciling imperial fittings or instrument lengths with metric plant drawings.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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