BASICS · CALCULATOR

Electrical unit converter

Free electrical unit converter: get mechanical power, length and awg conductor area from horsepower, length and awg gauge. With the formula shown.

Written by Chameera Sampath · Not yet reviewed by a licensed electrician. See the methodology.

US (NEC) only · NFPA 70 / NEC — locally adopted editionDefaults are US values. Verify the locally adopted NEC edition and project data.Official reference ↗

Project inputs

Measurements

Horsepower

Length

AWG gauge

Updates as inputs change. Unit changes preserve the same physical values.

THE MATH BEHIND THE ANSWER

Method & assumptions

1 hp = 745.7 W; 1 ft = 0.3048 m; dAWG = 0.127 × 92^((36−AWG)/39)

AWG conversion is geometric, not ampacity equivalence. Negative gauges: −1 = 00, −2 = 000, −3 = 0000.

Results do not check every aspect of an electrical installation. The calculators follow US (NEC) practice only; a regional preset changes defaults such as voltage and units, and no result certifies NEC compliance.

Sources and validation →

Worked example

Horsepower: 1 hp · Length: 100 ft · AWG gauge: 12

Mechanical power: 0.746 kW · Length: 30.48 m · AWG conductor area: 3.309 mm²

This example uses the stated inputs; results for the entered values appear above.

Explore the basics branch →See the related electrical concepts →

Estimating and invoicing tool

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