Engineering Calculators

Resistor Color Code Calculator

Band 1 (1st digit)

Band 2 (2nd digit)

Band 3 (Multiplier)

Band 4 (Tolerance)

Resistance Value

2,000 Ω (2 kΩ) ±5%

V = I × R P = V × I

Voltage (V)

Current (A)

Resistance (Ω)

Power (W)

Enter any two values to calculate the others

Supply Voltage (V)

LED Forward Voltage (V)

LED Forward Current (mA)

Number of LEDs (series)

Required Resistor: 150 Ω

Power Dissipation: 60 mW

Nearest Standard Value: 150 Ω (E24)

Input Voltage (Vin)

R1 (Ω)

R2 (Ω)

Output Voltage (Vout)

6.00 V

Vout = Vin × (R2 / (R1 + R2))