ELECTRONICS · CALCULATOR

Analog signal range converter

Free analog signal range converter: get scaled output from input value, input minimum, input maximum, output minimum and output maximum. 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

Input value

Input minimum

Input maximum

Output minimum

Output maximum

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

THE MATH BEHIND THE ANSWER

Method & assumptions

y = ymin + (x − xmin) × (ymax − ymin) / (xmax − xmin)

Linear scaling, e.g. 4–20 mA. Input maximum must exceed minimum.

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

Input value: 12 · Input minimum: 4 · Input maximum: 20 · Output minimum: 0 · Output maximum: 100

Scaled output: 50

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

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