Convert Chain (ch) (ch) to Millimeter (mm) (mm)
Category: Length
1 ch = 20116.8 mm
High-precision rounding: 6 decimals
How to convert chain (ch) to millimeter (mm)
We convert by pivoting through the SI base unit for Length and applying exact factors where applicable.
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Quick conversion table
Handy values for Chain (ch) → Millimeter (mm). Click a value to open that exact result.
Conversion formula
Linear unit conversions use standardized factors; many are exact by definition (e.g., 1 in = 25.4 mm, 1 ft = 0.3048 m).
Common mistakes
- Confusing international foot (0.3048 m) with legacy ‘US survey foot’ in old datasets.
- Rounding mid-calculation; keep precision to the end.
Unit facts
- Millimeter (mm): A millimeter is 1/1000 of a meter; used in machining and precision engineering.
About Length
Length measures distance or size. In SI it derives from the meter, defined via the speed of light, which ensures exact, reproducible conversions. Typical applications include construction, mapping, manufacturing tolerances, and navigation; legacy units like inches and feet remain common in trade and building plans.
About Chain (ch)
Chain (ch) is a commonly used unit within the Length category.
About Millimeter (mm)
Millimeter (mm)
Equals 1/1000 of a meter. Used for tolerances, mechanical parts, PCB traces, and rainfall amounts. Ideal when sub-centimeter precision is required.
History: Adopted alongside other metric submultiples; machine tooling and metrology standardized on millimeters to simplify interchangeability.