Correlation between Si units and American-British units
To make easier the conversion from SI units to British-American units and reverse, here are some tables.
Conversion of length
| mm | m | in | ft |
mm | 1 | 10 -3 | 3,93701*10 -2 | 3,28284*10 -3 |
m | 1000 | 1 | 39,3701 | 3,28084 |
in | 25,4 | 2,54*10 -2 | 1 | 8,333333*10 -2 |
ft | 304,8 | 3,048*10 -1 | 12 | 1 |
Conversion of mass
| g | kg | oz | lbm |
g | 1 | 10 -3 | 3,5274*10 -2 | 2,2046*10 -3 |
kg | 1000 | 1 | 35,2740 | 2,20462 |
oz | 28,3495 | 2,8349*10 -2 | 1 | 6,25*10 -2 |
lbm | 453,592 | 4,5359*10 -1 | 16 | 1 |
Conversion of energy
| J | Wh |
J | 1 | 2,77778*10 -4 |
Wh | 3600 | 1 |
Conversion of force
| N | oz | lbf |
N | 1 | 3,59694 | 2,24809*10 -1 |
oz | 2,78014*10 -1 | 1 | 6,25*10 -2 |
lbf | 4,44822 | 16 | 1 |
Conversion of torque
| Nm | oz in | lns in | lbs ft |
Nm | 1 | 141,612 | 8,85075 | 7,3756*10 -1 |
oz in | 7,0616*10 -3 | 1 | 6,25*10 -2 | 5,2083*10 -3 |
in lbs | 1,1299*10 -1 | 16 | 1 | 8,3333*10 -2 |
ft lbs | 1,35582 | 192 | 12 | 1 |
Conversion of moment of inertia
| kg cm 2 | Lb in s 2 | lb ft 2 | Lb ft s 2 |
kg cm 2 | 1 | 8,8508*10 -4 | 2,3730*10 -3 | 7,3756*10 -5 |
Lb in s 2 | 1129,85 | 1 | 2,68117 | 8,3333*10 2 |
Lb ft 2 | 421,401 | 3,7297*10 -1 | 1 | 3,10810*10 -2 |
Lb ft s 2 | 13558,2 | 12 | 32,1740 | 1 |
Conversion of power
| kW | HP |
kW | 1 | 1,34102 |
HP | 7,4570*10 -1 | 1 |
Conversion of velocity
| m/s | in/s | ft/s |
m/s | 1 | 39,3701 | 3,28084 |
in/s | 2,54*10 -2 | 1 | 8,3333*10 -2 |
ft/s | 3,048*10 -1 | 12 | 1 |
Conversion of temperature
t C = 5/9 ( t F - 32 ) | t C in °C (Celsius) |
°C | °F | K |
5 | 41 | 278,15 |
45 | 113 | 318,15 |
55 | 131 | 328,15 |