Voltage & Power to DC Electrical Resistance Calculator

DC Electrical Circuit Resistance Parameters
Voltage (V) [?]
Select voltage unit microvolts (µV) millivolts (mV) volts (V) kilovolts (kV) quectovolts (qV) rontovolts (rV) yoctovolts (yV) zeptovolts (zV) attovolts (aV) femtovolts (fV) picovolts (pV) nanovolts (nV) microvolts (µV) millivolts (mV) centivolts (cV) decivolts (dV) volts (V) decavolts (daV) hectovolts (hV) kilovolts (kV) megavolts (MV) gigavolts (GV) teravolts (TV) petavolts (PV) exavolts (EV) zettavolts (ZV) yottavolts (YV) ronnavolts (RV) quettavolts (QV)
Power (P) [?]
Select power unit watts (W) kilowatts (kW) megawatts (MW) volt-amperes (V·A) kilovolt-amperes (kV·A) electrical horsepower (hp(E)) quectowatts (qW) rontowatts (rW) yoctowatts (yW) zeptowatts (zW) attowatts (aW) femtowatts (fW) picowatts (pW) nanowatts (nW) microwatts (µW) milliwatts (mW) centiwatts (cW) deciwatts (dW) watts (W) decawatts (daW) hectowatts (hW) kilowatts (kW) megawatts (MW) gigawatts (GW) terawatts (TW) petawatts (PW) exawatts (EW) zettawatts (ZW) yottawatts (YW) ronnawatts (RW) quettawatts (QW) quectovolt-amperes (qV·A) rontovolt-amperes (rV·A) yoctovolt-amperes (yV·A) zeptovolt-amperes (zV·A) attovolt-amperes (aV·A) femtovolt-amperes (fV·A) picovolt-amperes (pV·A) nanovolt-amperes (nV·A) microvolt-amperes (µV·A) millivolt-amperes (mV·A) centivolt-amperes (cV·A) decivolt-amperes (dV·A) volt-amperes (V·A) decavolt-amperes (daV·A) hectovolt-amperes (hV·A) kilovolt-amperes (kV·A) megavolt-amperes (MV·A) gigavolt-amperes (GV·A) teravolt-amperes (TV·A) petavolt-amperes (PV·A) exavolt-amperes (EV·A) zettavolt-amperes (ZV·A) yottavolt-amperes (YV·A) ronnavolt-amperes (RV·A) quettavolt-amperes (QV·A) electrical horsepower (hp(E)) mechanical horsepower (hp(I)) imperial horsepower (hp(I)) metric horsepower (PS) calories/sec (cal/s) kilocalories/sec (kcal/s) joules/sec (J/s) kilojoules/sec (kJ/s) british thermal units/sec (Btu/s ISO) foot-pounds/sec (ft·lb/s) newton-metres/sec (N·m/s) kilogram-force metres/sec (kgf·m/s) gram-force centimetres/sec (gf·cm/s) ergs/sec (erg/s) calories/min (cal/min) kilocalories/min (kcal/min) joules/min (J/min) kilojoules/min (kJ/min) british thermal units/min (Btu/min ISO) foot-pounds/min (ft·lb/min) newton-metres/min (N·m/min) kilogram-force metres/min (kgf·m/min) gram-force centimetres/min (gf·cm/min) ergs/min (erg/min) calories/hour (cal/h) kilocalories/hour (kcal/h) joules/hour (J/h) kilojoules/hour (kJ/h) british thermal units/hour (Btu/h ISO) foot-pounds/hour (ft·lb/h) newton-metres/hour (N·m/h) kilogram-force metres/hour (kgf·m/h) gram-force centimetres/hour (gf·cm/h) ergs/hour (erg/h)
Calculate DC Electrical Resistance
Resistance (R) [?]
Select resistance unit ohms (Ω) kilohms (kΩ) megohms (MΩ) quectoohms (qΩ) rontoohms (rΩ) yoctoohms (yΩ) zeptoohms (zΩ) attoohms (aΩ) femtoohms (fΩ) picoohms (pΩ) nanoohms (nΩ) microohms (µΩ) milliohms (mΩ) centiohms (cΩ) deciohms (dΩ) ohms (Ω) decaohms (daΩ) hectoohms (hΩ) kilohms (kΩ) megohms (MΩ) gigaohms (GΩ) teraohms (TΩ) petaohms (PΩ) exaohms (EΩ) zettaohms (ZΩ) yottaohms (YΩ) ronnaohms (RΩ) quettaohms (QΩ)

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User Guide

Use this calculator to determine the resistance in ohm, kilohm or megohm units of a direct current (DC) electrical circuit with a specified voltage and power. Two conversion scales show how the resistance will vary  when the voltage or power is changed independently, whilst the other remains fixed with the entered value.

Formula

The formula used by this calculator to determine the DC electrical resistance from the voltage and power of the circuit is:

R = V² / P

Symbols

• R = Resistance (DC)
• V = Voltage (DC)
• P = Electrical power (DC)

Voltage (V)

This is the DC voltage or electrical potential difference applied to or generated by the electrical circuit.

Power (P)

This is the electrical power generated in a DC electrical circuit.

Resistance (R)

This is the electrical resistance of the DC electrical circuit with the entered values for power and current.