SI Conversions: Practice Calculations
1. Calculate the number of kilometers (km) there are in 105 meters (m).
Ans. 1.05 x 10-1 km
2. How many meters (m) are there in 2.0043 x 10-5 kilometers (km)?
Ans. 2.0043 x 10-2 m
3. A piece of property is found to be 499 decimeters (dm) long. What is the value of this length in
centimeters (cm)?
Ans. 4.99 x 103 cm
4. Calculate the number of kilometers (km) there are in 1.549 micrometers (m).
Ans. 1.549 x 10-9 km
5. Calculate the length, in centimeters (cm), of an object that is 7.8835 x 105 millimeters
(mm) long.
Ans. 7.8835 x 104 cm
6. How many millimeters are there in 5.97 x 10-6 meters (m)?
Ans.
5.97 x 10-3 mm
7. How many decimeters (dm) are there in 8.06295 millimeters (mm)?
Ans. 8.06295 x 10-2 dm
8. Calculate the number of centimeters there are in 6,245,101 kilometers.
Ans. 6.245101 x 1011 cm
9. How many meters are there in 0.0031 kilometer?
Ans. 3.1 m
10. A very small object is found to have a length of 3.44 x 10-4 meter. Express this length in
micrometers.
Ans. 3.44 x 102 m
11. Calculate the number of milligrams there are in 10.00 kilograms. Ans. 1.0 x 107 mg
12. A book is found to have a mass 0.6321 kilogram. Calculate its mass in grams.
Ans. 6.321 x 102 g
13. How many decigrams are there in 0.822 microgram?
Ans.
8.22 x 10-6 dg
14. Expressed in centigrams (cg), the mass of an object is 458. What is the object's
mass in milligrams ?
Ans. 4.58 x 103 mg
15. Calculate the number of kilograms in 7.66 x 105 grams.
16. How many kilograms are there in 2.023 x 10-3 milligram?
Ans.
7.66 x 102 kg
Ans.
2.023 x 10-9 kg
17. An object has a mass of 89.00 grams. Express this mass in centigrams.
Ans. 8.9 x 103 cg
1
18. Calculate the number of micrograms in 0.000311 gram.
Ans.
3.11 x 102 g
19. What is the mass, in decigrams of an object whose mass is found to be 1.94 x 10-1 gram?
Ans. 1.94 dg
20. Calculate the number of milligrams in 6.2 x 104 micrograms.
Ans.
6.2 x 101 mg
21. Calculate the number of cubic centimeters (cm3) there are in 0.500 cubic decimeter (dm3).
Ans. 5.0 x 102 cm3
22. How many cubic meters (m3) are there in 4312 cubic centimeters (cm3)?
Ans. 4.312 x 10-3 m3
23. How many cubic decimeters (dm3) are there in 1.733 x 105 cubic meters (m3)?
Ans. 1.733 x 108 dm3
24. The volume of a sample of water is found to be 86.3 cubic centimeters (cm3). What is the volume of
the sample in cubic millimeters (mm3)?
Ans. 8.63 x 104 mm3
25. How many cubic decimeters (dm3) are there in 5.94 x 1010 cubic centimeters (cm3)?
Ans. 5.94 x 107 dm3
26. Calculate the number of cubic centimeters (cm3) in 16 cubic meters (m3).
Ans. 1.6 x 107 cm3
27. How many cubic millimeters (mm3) are there in an object whose volume is found to be
8.3014 x 10-2 cubic meter (m3)?
Ans. 8.301 x 107 mm3
28. How many cubic kilometers (km3) are there in 4.261 x 104 cubic meters (m3)?
Ans. 4.261 x 10–5 km3
29. Calculate the volume, in cubic decimeters (dm3), of a rectangular object that is 1.07 m long,
0.2233 m wide, and 0.895 m high. (V = l x w x h).
Ans. 2.14 x 102 dm3
30. What is the volume, in cubic centimeters (cm3), of a rectangular object that is 587 mm long, 93.5
mm wide, and 107.2 mm high?
Ans. 5.88 x 103 cm3
31. Convert 440 K to oF and oC.
Ans. 167oC; 333oF
32. Convert 140oF to oC and K.
Ans. 60oC;
2
333 K