Coil Calculator

Step-by-Step Guide to Using the Coil Calculator

Step 1: Select Wire Gauge

Begin by selecting the appropriate wire gauge from the drop-down menu. The wire gauge you select will determine the thickness of the coil wire. This field is required, and you can choose from various options, ranging from 32 AWG to 20 AWG, each corresponding to a specific diameter in millimeters.

Step 2: Enter Inner Diameter

Input the inner diameter of the coil in millimeters. This measurement should fall between the minimum of 1 mm and the maximum of 50 mm. Ensure that the inner diameter accurately reflects the desired coil size to proceed with accurate calculations.

Step 3: Specify Coil Length

Enter the length of the coil in millimeters. The coil length must be between 1 mm and 100 mm. Providing an accurate coil length will help in determining other parameters of the coil such as wire length.

Step 4: Input Number of Wraps

Define the number of wraps for your coil. This integer value should be between 1 and 50. The number of wraps directly influences the coil resistance and the total length of the wire needed.

Step 5: Define Target Resistance

Input your desired target resistance for the coil in ohms (Ω). You can set this value between a minimum of 0.1 Ω and a maximum of 3 Ω. This target is essential for comparing with the actual resistance of the coil after calculations.

Step 6: Calculate Results

• Wire Diameter: Calculated automatically based on the wire gauge selected. The result is displayed in millimeters to four decimal places.
• Coil Outer Diameter: The calculator will add the wire thickness to the inner diameter to find the outer diameter, displayed in millimeters to two decimal places.
• Total Wire Length: This value is determined by the number of wraps and the coil’s diameter and is presented in millimeters to two decimal places.
• Actual Resistance: Using the wire length, an accurate resistance value is calculated and shown in ohms with two decimal precision.
• Resistance Difference: This indicates the difference between the actual and target resistance, formatted to three decimal places in ohms, to show how close your coil is to the desired resistance.
• Heat Flux: The heat flux of the coil, displayed in watts per square millimeter, provides insight into the power distribution along the coil, calculated to two decimal places.

Review all calculated results, ensuring they meet your specifications. Adjust any input parameters if necessary to achieve the desired coil characteristics.