How to Convert Millimetres to Chi (Chinese foot) (mm to chi)
Length conversions come up when reading overseas furniture specs, cycling the Round Island Route in kilometres while a foreign app shows miles, or checking marine distances in the Singapore Strait in nautical miles. This guide shows how to convert millimetres into chi (chinese foot) by hand, with examples and a quick-reference table.
The conversion
To convert millimetres to chi (chinese foot), multiply the value by 0.003. To go the other way, divide by the same number (or multiply by 333.3333333333). For a quick estimate, multiply by about 0.003.
Chi (Chinese foot) = millimetres × 0.003
Worked examples
- 3 mm = 0.009 chi
- 12.5 mm = 0.0375 chi
- 75 mm = 0.225 chi
Millimetres to Chi (Chinese foot) table
| Millimetres | Chi (Chinese foot) |
|---|---|
| 1 mm | 0.003 chi |
| 2 mm | 0.006 chi |
| 5 mm | 0.015 chi |
| 10 mm | 0.03 chi |
| 20 mm | 0.06 chi |
| 25 mm | 0.075 chi |
| 50 mm | 0.15 chi |
| 100 mm | 0.3 chi |
| 250 mm | 0.75 chi |
| 500 mm | 1.5 chi |
| 1,000 mm | 3 chi |
Common questions
Is mm to chi exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the Chi (Chinese foot) to Millimetres converter.
Mistakes to avoid
Dropping the units
A bare number without a unit is easy to misread later. Always write the unit with the result.
Forgetting squared and cubed units
Area and volume factors are the length factor squared or cubed, so 1 m² is about 10.76 sq ft, not 3.28.
Multiplying when you should divide
Converting to a smaller unit gives a bigger number, and converting to a larger unit gives a smaller one. If your answer moves the wrong way, you have inverted the factor.
Background
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
For any value, use the Millimetres to Chi (Chinese foot) Converter or browse all length converters.
Run your own numbers: Millimetres to Chi (Chinese foot) Converter