1 km = 1000 m 1 km = 10000 decimeter 1 km = 100000 cm.

1 m = 10 decimeter1m =100 cm1m =1000 mm (not commonly used).

1 decimeter = 1 0cm1decimeter =100mm.

1 cm = 10/0mm.

2. Weight unit.

1t = 1000kg 1t = 10000g 1k g = 1000g。

3. Area unit.

1 km2 = 100 hectare 1 hectare = 100 hectare 1 hectare = 100 square meter.

1 m2 = 100 square decimeter.

1 square decimeter = 100 square centimeter 1 square kilometer = 100000 square meter.

4. Area unit conversion.

1 square kilometer = 100 hectare 1 hectare = 10000 square meter 1 square meter = 100 square decimeter.

1 decimeter square = 100 cm2 1 cm2 = 100 mm2.

5. unit of volume.

1 m3 = 1000 cubic decimeter 1 cubic decimeter = 1000 cubic centimeter.

1 m3 = 1000000 cubic centimeters.

6. unit of volume.

1 l = 1 cubic decimeter = 1000 ml (cubic centimeter) 1 ml = 1 cubic centimeter.

7, body (volume) product unit conversion.

1 m3 = 1000 cubic decimeter 1 cubic decimeter = 1000 cubic centimeter 1 cubic decimeter = 1 liter.

1 cm3 = 1 ml 1 m3 = 1000 liter.

8. Conversion of weight units.

1t = 1000kg 1kg = 1000g 1kg = 1kg。

9. RMB unit conversion.

1 yuan = 10 angle 1 angle = 10 point 1 yuan = 100 point 10 yuan = 1000 point.

10, time unit conversion.

1 century =100/year =1February (3 1 day) zone (1357810/February).

February 28th in a normal year, February 29th in a leap year, 365 days in a normal year and 366 days in a leap year.

1 day =24 hours 1 hour =60 minutes 1 minute =60 seconds 1 hour =3600 seconds.