Toolkit
Electrical Formulas
Electrical Formulas
Ohms Law
Solve for Power(P)
Power (P)
=
V × I
Power (P)
=
V² / R
Power (P)
=
R × I²
Solve for Voltage(V)
Voltage(V)
=
P / I
Voltage(V)
=
R × I
Voltage(V)
=
√ P x R
Solve for Power(P)
Power (P)
=
V × I
Power (P)
=
V² / R
Power (P)
=
R × I²
Solve for Voltage(V)
Voltage(V)
=
P / I
Voltage(V)
=
R × I
Voltage(V)
=
√ P x R
Max Circuit Length
Lmax
=
Tha * Uo * Sph * Spe
la * Resistivity * (Sph + Spe)
Lmax
=
Tha * Uo * Sph * Spe
la * Resistivity * (Sph + Spe)
la * Resistivity * (Sph + Spe)
AC Single Phase
kW
=
I × V × pF
1000
kW
=
kVA × pF
Output kW
=
I × V × pF × Eff
1000
kVA
=
I × V
1000
I
=
kW × 1000
V × pF × Eff
I
=
kVA × 1000
V
I
=
HP × 746
V × pF × Eff
kW
=
I × V × pF
1000
1000
kW
=
kVA × pF
Output kW
=
I × V × pF × Eff
1000
1000
kVA
=
I × V
1000
1000
I
=
kW × 1000
V × pF × Eff
V × pF × Eff
I
=
kVA × 1000
V
V
I
=
HP × 746
V × pF × Eff
V × pF × Eff
AC Three Phase
kW
=
I × V × 1.732 × pF
1000
kW
=
kVA × pF
kW
=
HP × 746
1000 × Eff
Output kW
=
I × V × 1.732 × pF × Eff
1000
kVA
=
I × V × 1.732
1000
kVA
=
kW
pF
I
=
kW × 1000
V × 1.732 × pF × Eff
kW
=
I × V × 1.732 × pF
1000
1000
kW
=
kVA × pF
kW
=
HP × 746
1000 × Eff
1000 × Eff
Output kW
=
I × V × 1.732 × pF × Eff
1000
1000
kVA
=
I × V × 1.732
1000
1000
kVA
=
kW
pF
pF
I
=
kW × 1000
V × 1.732 × pF × Eff
V × 1.732 × pF × Eff
Direct Current
kW
=
I × V
1000
Output kW
=
I × V × Eff
1000
I
=
kW × 1000
V × Eff
I
=
HP × 746
V × Eff
HP
=
I × V × Eff
746
Eff
=
HP × 746
I × V
kW
=
I × V
1000
1000
Output kW
=
I × V × Eff
1000
1000
I
=
kW × 1000
V × Eff
V × Eff
I
=
HP × 746
V × Eff
V × Eff
HP
=
I × V × Eff
746
746
Eff
=
HP × 746
I × V
I × V
Voltage Drop
Vc (mV/A.m)
=
500 × Vd
L I
Vd (volts)
=
Vc L I
500
Vd (%)
=
Vd × 100
Source Voltage
Vc (mV/A.m)
=
500 × Vd
L I
L I
Vd (volts)
=
Vc L I
500
500
Vd (%)
=
Vd × 100
Source Voltage
Source Voltage
