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China Statutory Measurement Units

Last updated by rainer at 2015/4/15

When foreign tourists go on a trip in China, sometimes they may be confused about some Chinese measurement units, which might get foreigners into a lot of trouble and cause inconvenience to them. The following contents are some China statutory measurement units that are commonly used in China, the relations among China statutory measurement units and the relations between China statutory measurement units and measurement units of some foreign counties, hoping to give foreigners a little help.
 

China statutory measurement units

 

The most commonly used China statutory measurement units include length unit, area unit, volume unit, mass unit, force unit, speed unit and temperature unit, etc.

 

1. The Length Unit

The length unit includes meter (m), centimeter (cm), millimeter (mm), kilometer (km), micrometer (μm), nanometer (nm) and nautical mile (n mile). The relations among them are as follows:

1 m = 100 cm = 1000 mm = 10-3 km = 106μm = 109 nm

1 n mile = 1852 m = 1.852 km

 

2. The Area Unit

The area unit includes square meter (m2), square kilometer (km2), square centimeter (cm2), square millimeter (mm2) and hectare (ha). The relations among them are as follows:

1 m2 = 104 cm2 = 106 mm2 = 10-6 km2

1 ha = 104 m2 = 10-2 km2

 

3. The Volume Unit

The volume unit includes cubic meter (m3), cubic kilometer (km3), cubic centimeter (cm3), cubic millimeter (mm3), liter (l) and milliliter (ml). The relations among them are as follows:

1 m3 = 106 cm3 = 109 mm3 = 10-9 km3

1 l = 1000 ml = 10-3 m3

 

4. The Mass Unit

The mass unit includes kilogram (kg), gram (g), milligram (mg), ton (t) and atomic mass unit (u). The relations among them are as follows:

1 kg = 103 g = 106 mg = 10-3 t

1 u = 1.66054×10-27 kg

 

5. The Force Unit

The force unit includes newton (N). Its definition is as follow:

1 N=1m·kgS-2;

 

6. The Speed Unit

The speed unit includes meters per second (m/s), kilometers per hour (km/h) and kn (nautical mile per hour). The relations among them are as follows:

1 km/h = 0.27 m/s

1 kn = 0.51444 m/s

 

7. The Frequency Unit

The frequency unit includes hertz (Hz). Its definition is as follow:

1 Hz = 1s

 

8. The Energy Unit

The energy unit includes joule (J) Electron-volts (eV) 1000 watts hour (kW·h) and calorie (cal). The relations among them are as follows:

1 J = 1 N·m

1 eV = 1.602189×10-19 J

1 kW·h = 3.6×106 J

1 J = 4.2 cal

 

9. The Power Unit

The power unit includes watt (W) and kilowatts (kW). The relations among them are as follows:

1 W = 1 J/s

1 kW = 1000 J/s

 

10. The Pressure Unit

The pressure unit includes pascal (Pa) and kilopascal (kPa). The relations among them are as follows:

1 Pa = 1 Nm2

1 kPa=1000 Nm2

 

11. The Angle Unit

The angle unit includes radian (rad), (°), (′), and (″). The relations among them are as follows:

1 rad = 180°π

1°=π∕180rad = 60′= 3600″

 

The relations between China statutory measurement units and measurement units of some foreign counties

 

1. The Length Conversion

1 km = 0.621 mile

1 m = 3.281 ft = 1.094 yd

1 cm = 0.394 in

1 mile = 5280 ft

1 n mile = 1.1516 mile

 

2. The Area Conversion

1 km2 = 247.1 acre = 0.386 mile2

1 m2 = 10.764 ft2

1 in2 = 6.452 cm2

1 ha = 2.471 acre

 

3. The Volume Conversion

1 m3 = 1000 l = 35.315 ft3 = 6.29 bbl

1 in3 = 16.3871 cm3

1 gal = 4.546 1

 

4. The Mass Conversion

1 kg = 2.205 lb

1 oz = 28.350 g

1 t = 2205 lb

 

5. The Force Conversion

1 N 0.225 lbf =0.102 kgf

1 kgf = 9.81 N

1 lbf = 4.45 N

 

6. The Speed Conversion

1 mile/h = 0.44704 m/s

1 ft/s = 0.3048 m/s