mm to awg converter

About This Tool

This tool converts a conductor diameter in millimeters to the nearest AWG size, returning the AWG number and the bare diameter in millimeters. It serves electrical engineers, technicians, designers, and procurement staff who need metric-to-AWG translations for datasheets, BOMs, and compatibility checks.
Conceptually, AWG is a discrete set defined by a standard diameter table. The calculation uses the exact AWG diameter formula d_in = 0.005 * 92^((36 - AWG)/39) and converts to millimeters (d_mm = d_in * 25.4). Given input_mm, the tool derives the AWG, rounds to the nearest integer, and clamps to the 1–40 range. It can also provide the exact diameter for the chosen AWG.
Core value lies in speed, accuracy, and alignment with common specifications. It supports design reviews, BOM validation, and supplier communications by providing a single reference value and a transparent calculation method. It handles edge cases such as very small or very large diameters and reports the corresponding AWG and diameter.
Use cases include selecting wire stock for a harness, verifying tolerance bands on drawings, and converting existing metric data to AWG for compatibility checks. Assumptions include solid conductor with no insulation; results reflect bare-diameter measurements. Output is suitable for engineering calculations, documentation, and procurement workflows.

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