Wire Gauge AWG Calculator
American Wire Gauge, or AWG, is the standard system for sizing electrical wire in North America, where a smaller number means a thicker wire. This calculator converts a gauge number into the wire diameter and cross sectional area in both metric and imperial units, using the exact geometric definition where the diameter equals 0.005 inch times 92 raised to the power of 36 minus the gauge, over 39. It also works the other way, letting you enter a diameter to find the closest gauge. Knowing the area matters because it sets how much current a wire can safely carry and how much resistance it adds over a run. Enter an AWG number from a thick 4 gauge feeder down to a thin 30 gauge signal wire and read the dimensions instantly. Everything runs locally in your browser.
How to use Wire Gauge AWG Calculator
- Choose whether to convert from AWG or from a diameter.
- Enter the gauge number, or the diameter in mm or inches.
- Read the matching diameter and cross section area.
- Compare the metric and imperial output for your cable spec.
Frequently asked questions
How does AWG relate to wire diameter?
AWG is a logarithmic scale where a smaller gauge number means a thicker wire, and the tool converts a gauge to its exact diameter and vice versa.
What cross section does it report?
It computes the circular cross section area from the wire diameter, giving square millimetres and square mils so you can compare against metric cable ratings.
Can it convert a diameter back to a gauge?
Yes, enter a diameter in mm or inches and it returns the nearest American Wire Gauge number for that conductor.
What is Wire Gauge AWG Calculator?
American Wire Gauge, or AWG, is the standard system for sizing electrical wire in North America, where a smaller number means a thicker wire. This calculator converts a gauge number into the wire diameter and cross sectional area in both metric and imperial units, using the exact geometric definition where the diameter equals 0.
Is Wire Gauge AWG Calculator free to use?
Yes. Wire Gauge AWG Calculator is completely free, with no sign-up and no usage limits.
Does Wire Gauge AWG Calculator work in a web browser?
Yes. Wire Gauge AWG Calculator runs in any modern web browser. There is nothing to download or install.
Is my data private with Wire Gauge AWG Calculator?
Yes. Wire Gauge AWG Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.
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