H4005. Conversions to SI-units (NEN 999 and NEN 3049), continued
H4005. Conversions to SI-units (NEN 999 and NEN 3049), continued
Overview of various SI and Imperial units and conversion to SI.
| Type of unit | Name of unit | Symbol | Quantity | SI-symbol |
|---|---|---|---|---|
| Pressure | atmosphere (normal) | atm | 101.325 | Pa |
| technical atmosphere | at | 98.066,5 | Pa | |
| kgf.cm2 | 98.066,5 | Pa | ||
| Pound-force per square inch | Psi | 6.894,76 | Pa | |
| bar | bar | 100.000 | Pa | |
| mm Mercury column | mm Hg | 133,322 | Pa | |
| inch Hg (mercury) | in Hg | 3.386,39 | Pa | |
| mm water column | mm H2O | 9,80665 | Pa | |
| inch water | in H2O | 249,089 | Pa | |
| foot water | ft H2O | 2.989,07 | Pa | |
| torr | torr | 133,322 | Pa | |
| Work, energy, amount of heat | calorie | cal | 4,186 | J |
| newton meter | N.m | 1 | J | |
| watt seconde | W.s | 1 | J | |
| kilowatt hour | kWh | 3.600.000 | J | |
| british thermal unit | Btu | 1.055,06 | J | |
| horse power hour | hph | 2.685.128 | J | |
| Power, energy flow, convective heat | joule per seconde | J.s-1 | 1 | W |
| kcal.h-1 | 1,163 | W | ||
| horse power | pk | 735,499 | W | |
| British horse power | Bhp | 745,7 | W | |
| Btu.h-1 | 0,29307 | W | ||
| Electrical power | ||||
| - effective | watt | W | W | |
| - apparent | volt.ampère VA | VA | 1 | W |
| - reactive (blind capacity) | var | var | 1 | W |
| Specific heat | joule per kilogram per Kelvin | J.(kg.K)-1 | ||
| kcal.(kg.C)-1 | 4.186,8 | J.(kg.K)-1 | ||
| Btu.(lb.F)-1 | 4.186,8 | J.(kg.K)-1 | ||
| Heat load | kcal.(m2.h)-1 | 1,163 | W.m2 | |
| Btu.(ft2.h)-1 | 3,15459 | W.m2 | ||
| Heat conductivity coefficient | kcal.(m.h.C)-1 | 1,163 | W.(m.K)-1 | |
| Btu.(ft.h.F)-1 | 1,73073 | W.(m.K)-1 | ||
| Heat transfer coefficient | kcal.(m2.h.C)-1 | 1,163 | W(m2.K)-1 | |
| Btu.(ft2.h.F)-1 | 5,67826 | W(m2.K)-1 | ||