overflow's powercalc v0.54
Atomizer:
U: V I: A R: Ω
P: W U:

Power supply: Ignore
Linear regulator
Switching regulator / booster
 
η: %
U: V I: A
P: W (Total)
P: W (Loss)

U = Voltage in volts
 U = I * R 
 U = P / I 
 U = sqrt( P * R ) 

I = Current in amperes
 I = U / R 
 I = P / U 
 I = sqrt( P / R ) 

R = Resistance in ohms
 R = U / I 
 R = P / I2 
 R = U2 / P 

P = Power in watts
 P = U * I 
 P = U2 / R 
 P = I2 * R 

Memo

History

Adapted from overflow's powercalc v0.54