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Conversions and Formulas


E = Voltage / I = Amps / W = Watts / PF = Power Factor / Eff = Efficiency / HP = Horsepower

AC/DC Power Formulas
To Find Direct Current AC / 1phase
115v or 120v		 AC / 1phase
208,230, or 240v		 AC 3 phase
All Voltages
Amps
(when HP is known)		 HP x 746
E x Eff		 HP x 746
E x Eff X PF		 HP x 746
E x Eff x PF		 HP x 746
1.73 x E x Eff x PF
Amps
(when Kilowatts is known)		 kW x 1000
E		 kW x 1000
E x PF		 kW x 1000
E x PF		 kW x 1000
1.73 x E x PF
Amps
(when kVA is known)		   kVA x 1000
E		 kVA x 1000
E		 kVA x 1000
1.73 x E
Kilowatts I x E
1000		 I x E x PF
1000		 I x E x PF
1000		 I x E x 1.73 PF
1000
Kilovolt-Amps (kVA)   I x E
1000		 I x E
1000		 I x E x 1.73
1000
Horsepower
(output)		 I x E x Eff
746		 I x E x Eff x PF
746		 I x E x Eff x PF
746		 I x E x Eff x 1.73 x PF
746

Power Equivalents
Type the number you wish converted here:
Then click radio buttons for desired conversion:
From: Hp
 Metric hp
 Kw
 Poncelets
 Kg-m/sec
 Ft-lb/sec
 Kcal/sec
 Btu/sec
To: Hp
 Metric Hp
 Kw
 Poncelets
 Kg-m/sec
 Ft-lb/sec
 Kcal/sec
 Btu/sec

To find mA for a given pressure in a 4-20 Loop:

ex. 0 - 500 PSI = 4 - 20 mA
Span of mA
Range of Pressure
ie:
16 mA
500 PSI
= .032 mA per PSI
.032 mA X 250 PSI = 8 mA + 4 mA (offset from 0) = 12 mA
or
250 PSI = 12 mA

Here are LINKS to a few of the WWW's best Converters & Formula Pages.
On-Line Generic Converter
On-Line Megaconverter
On-Line Metric Converter
Josh Madison's Free Converter Download
a must for every desktop!

eFunda Engineering Formulas
Engineers Edge

 



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