Physical Properties of Coil

Determine resistance, total wire length, and number of windings.

Utilize this online electrical calculator to compute the physical characteristics of a coil or material, including resistance, total wire length, and number of windings. The calculator assumes the wire to be copper when calculating resistance and voltage.

Wire Diameter
Number Of Turns
Bobbin Length
Bobbin Diameter
Send the result to an email

    1 Number of calculations

    T = \frac{bl}{d}
    n = \frac{\text{Turns}}{T}
    cd = (2 \cdot n \cdot d) + bd
    r = \frac{n \cdot d + bd}{2}
    a = \pi \cdot r \cdot r
    L = \frac{2 \cdot \pi \cdot r \cdot n}{1000}
    \text{rpm} = 0.0333 \cdot \frac{(\frac{0.812}{2})(\frac{0.812}{2})}{(\frac{d}{2})(\frac{d}{2})}
    R = \text{rpm} \cdot L
    V = R \cdot I
    P = V \cdot I


    • 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,

    Leave a Reply

    Your email address will not be published. Required fields are marked *

    You can use the Markdown in the comment form.