A.1 Metric System Conversions
|
|
From |
To |
Multiply by: |
|
Mass |
ounces |
grams |
28.349 |
|
pounds |
kilograms |
0.454 |
|
|
short tons |
metric tons |
0.907 |
|
|
grams |
ounces |
0.035 |
|
|
kilograms |
pounds |
2.205 |
|
|
metric tons |
short tons |
1.102 |
|
|
Volume |
cubic metres |
cubic feet |
33.31 |
|
Temperature |
°F |
°C |
5/9 (after subtracting 32) |
|
°C |
°F |
9/5 (then add 32) |
|
|
Length |
inches |
millimetres |
25.4 |
|
feet |
centimetres |
30.48 |
|
|
yards |
metres |
0.914 |
|
|
miles |
kilometres |
1.609 |
|
|
millimetres |
inches |
0.039 |
|
|
centimetres |
inches |
0.393 |
|
|
metres |
yards |
1.09 |
|
|
kilometres |
miles |
0.62 |
|
|
Area |
square inches |
square centimetres |
6.5 |
|
square feet |
square metres |
0.092 |
|
|
square yards |
square metres |
0.836 |
|
|
square miles |
square kilometres |
2.6 |
|
|
acres |
hectares |
0.404 |
|
|
square centimetres |
square inches |
0.16 |
|
|
square metres |
square yards |
1.195 |
|
|
square kilometres |
square miles |
0.39 |
|
|
hectares |
acres |
2.47 |
A.2 Heat and Energy
|
1 kilowatt-hour = |
1 000 watt-hour |
|
|
1.3410 HP-hour |
|
|
3 600 000 joules |
|
|
3 413 BTU |
|
|
860 kcals |
|
|
3.518 lb water evaporation from and at 212°F |
|
|
22.76 lb of water raised from 62 to 212°F |
|
|
1.595 kg of water evaporation from and at 100°C |
|
|
9.907 kg of water raised from 20 to 100°C |
|
1 atmosphere = |
14.69 lb per sq in = 1.02 kg per sq cm |
|
1 calorie = |
0.003968 BTU |
|
1 BTU = |
252 calories (gramme) (15°C) |
|
1 BTU = |
heat required to raise 1 lb water 1°F |
|
1 BTU = |
0.00039 HP-hour |
|
1 BTU per min = |
17.6 watts |
|
1 cu in = |
0.01639 litres |
|
1 watt = |
0.00134 HP |
|
1 joule = |
1 watt-sec |
|
1 HP = |
746 watts |
|
p = |
3.1416 |
