The DC Resistance of a Wire calculator computes the DC resistance of a wire of length lp whose cross sectional area (bare wire) is Aw.
INSTRUCTIONS: Choose your preferred units and enter the following:
- (ρ) Resistivity of Wire (Ω•cm)
- (lp) Length of Wire
- (Aw) Cross Sectional Area of the bare wire.
DC Resistance: The calculator returns the resistance in Ohms. However, this can be automatically converted to other units via the pull-down menu.
General Information
The resistivity of soft-annealed copper at room temperature is `1.724 x 10^-6 Omega * cm`.
AC / DC Calculator Information
- Voltage Drop: This computes the voltage drop in volts and as a percentage over a length of cable (wire) based on length of wire, gauge, wire material, temperature range and phase.
- Wire Gauge Choice for Safe Voltage Drop: This determines the lightest gauge of wire that can be used over a run (circuit) that maintains adequate voltage.
- Circular Mils and Voltage Drop: This computes voltage drop based on wire diameter in circular mils instead of wire gauge.
- Electricity Usage Cost: This computes the cost of electricity for the use of a piece of equipment based on the power consumption rate, duration and cost of electricity.
- Electricity Consumption: This computes the amount of electricity consumed by an electrical appliance or motor over time.
- Rolling Offset: This computes the travel (T) and run (R) of a rolling offset used in conduit piping based on the offsets and angles.
- Diameter of AWG Wire: This provides the diameter of wire based on the American Wire Guide (AWG) gauge in mils and millimeters, and it also provide the cross-section area in square millimeters.
- P = V2 / R: This computes power (Watts) based on the voltage (V) and resistance (R).
- DC to AC Converter: Computes the approximate voltage of Alternating Current (AC) from the voltage of Direct Current (DC).
- Diameter to Circular Mils: Computed the circular mils of a wire and the cross-section area based on the wire's diameter.