Calculate resistance, total wire length, and the number of windings.

Use this online electrical calculator to determine the physical attributes of a coil or material, encompassing resistance, total wire length, and the number of windings. Please note that the calculator assumes the wire to be copper when computing resistance and voltage.

## Physical Properties of Coil formula

**Where**:

- T = Turns per winding,
- bl = Length of Bobbin,
- d = Wire Diameter,
- n = Number of windings,
- cd = Outer diameter of the coil,
- bd = Diameter of Bobbin,
- r = radius of the middle of the coil,
- a = Cross-sectional area,
- L = Total Length,
- rpm = Resistance/meter,
- R = Resistance,
- V = Voltage at Rated Current,
- I = Current,
- P = Power at Rated Current