How to Convert Micrometres to Chi (Chinese foot) (µm 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 micrometres into chi (chinese foot) by hand, with examples and a quick-reference table.
The conversion
To convert micrometres to chi (chinese foot), multiply the value by 3.000000e-06. To go the other way, divide by the same number (or multiply by 333,333.3333333333). Because the factor is tiny, scientific notation keeps the numbers manageable.
Chi (Chinese foot) = micrometres × 3.000000e-06
Worked examples
- 3 µm = 9.000000e-6 chi
- 12.5 µm = 3.750000e-5 chi
- 75 µm = 0.000225 chi
Micrometres to Chi (Chinese foot) table
| Micrometres | Chi (Chinese foot) |
|---|---|
| 1 µm | 3.000000e-6 chi |
| 2 µm | 6.000000e-6 chi |
| 5 µm | 1.500000e-5 chi |
| 10 µm | 3.000000e-5 chi |
| 20 µm | 6.000000e-5 chi |
| 25 µm | 7.500000e-5 chi |
| 50 µm | 0.00015 chi |
| 100 µm | 0.0003 chi |
| 250 µm | 0.00075 chi |
| 500 µm | 0.0015 chi |
| 1,000 µm | 0.003 chi |
Common questions
Is µm 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 Micrometres converter.
Mistakes to avoid
Rounding the factor too early
Using 3 instead of 3.28 for feet per metre introduces an error of almost 9% before you have started.
Dropping the units
A bare number without a unit is easy to misread later. Always write the unit with the result.
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
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.
Unit conversion is simply multiplication by a fixed ratio. The ratio between two units of the same quantity never changes, so once you know it you can convert any value in either direction.
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
For any value, use the Micrometres to Chi (Chinese foot) Converter or browse all length converters.
Run your own numbers: Micrometres to Chi (Chinese foot) Converter