Current Divider  Online Calculator
An electric current divider outputs a current that is a fraction of the input current.
A current divider is a linear circuit that produces an output current that is a fraction of the input current.
Current is split between the branches of the divider. The total resistance in the electrical circuit can calculated
R _{ T } = R_{1} R_{2}/ (R_{1} + R_{2}) (1)
where
R _{ T } = total resistance (ohms, Ω)
R _{ n } = resistance in branch n (ohms, Ω )
The voltage difference across the circuit
U = I R _{ T }
= I R_{1} R_{2}/ (R_{1} + R_{2}) (2)
where
U = electrical potential (volts, V)
I = total current through the circuit (amps, A)
Split current I_{1} can be calculated
I_{1} = U / R_{1}
= (I R_{1} R_{2}/ (R_{1} + R_{2}) ) / R_{1}
= I R_{2}/ (R_{1} + R_{2}) (3)
Split current I_{2} can be calculated
I_{2}= U / R_{2}
= (I R_{1} R_{2}/ (R_{1} + R_{2}) ) / R_{2}
= I R_{1} / (R_{1} + R_{2}) (4)
Example  Current Divider
The total resistance in a current divider with supply voltage 3.3 V and resistor R_{1} = 220 ohm and resistor R_{2}= 47 ohm can be calculated as
R _{ T } = ( 220 ohm ) ( 47 ohm ) / (( 220 ohm ) + ( 47 ohm ))
= 38.7 ohm
The total current through the current divider can be calculated
I = (3.3 V) / (38.7 ohm)
= 0.085 amps
= 85 mA
The current through resistor R_{1} can be calculated
I_{1} = (3.3 V) / (220 ohm)
= 0.015 amps
= 15 mA
The current through resistor R_{2} can be calculated
I_{2}= (3.3 V) / (47 ohm)
= 0.070 amps
= 70 mA
Current Divider  Online Calculator
R  total resistance (ohms)
I_{1}  split current (amps)
I_{2} split current (amps)
I  total current (amps)
Related Topics

Electrical
Electrical engineering with units, amps and electrical wiring. Wire gauges, electrical formulas, motors and more.
Related Documents

Electric Circuit Diagram  Drawing Template
Online shareable electric circuit diagram. 
Electrical Parallel Circuits
Resistance, voltage and current in electrical parallel circuits. 
Electrical Resistance in Serial and Parallel Networks
Resistors in parallel and serial connections. 
Electrical Series Circuits
Voltage and current in electrical series circuits. 
Kirchhoff's Voltage and Current Laws
Kirchhoff's current and voltage laws. 
Relative vs. Absolute Voltage
Electric circuits and voltage at any point. 
Voltage Dividers  Online Calculator
Output voltage potential divider. 
Voltage Sources vs. Current Sources
Voltage and Current Sources