Calculator

Enter any two values to calculate the others.

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Unit Conversion Reference

Voltage

1 kV = 1000 V

1 V = 1000 mV

Current

1 A = 1000 mA

Resistance

1 kΩ = 1000 Ω

1 MΩ = 1,000,000 Ω

Power

1 kW = 1000 W

1 MW = 1,000,000 W

1 hp ≈ 745.7 W

1 BTU/h ≈ 0.293 W

Formula Wheel

V = P/I V = I×R I = P/V I = V/R R = V/I R = P/I² P = V×I P = I²×R Ohm's Law V = I × R

Ohm's Law Formulas

Voltage (V)

V = I × R

V = P / I

Current (I)

I = V / R

I = P / V

Resistance (R)

R = V / I

R = P / I²

Power (P)

P = V × I

P = I² × R

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