PLC Analog Scaling Calculator

Convert 4–20 mA, 0–10 V, or custom raw values to engineering units—or calculate the inverse command value. Browse the Protection Calculator Hub.

Quick and Advanced Analog Scaling Calculator

Quick example: 12 mA on a 4–20 mA, 0–100 range equals 50 engineering units.

Direction

Input preset

Input/raw minimum

Input/raw maximum

Engineering minimum

Engineering maximum

Value to scale

Scaled result

Result explanation and formula:

Use the exact module's configured raw endpoints. This vendor-neutral calculator does not supply module-specific counts, diagnose wiring, or replace commissioning and loop checks.

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Your Calculation Path

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Continue Your Calculation

After checking scaling, use OEM diagnostics and loop checks to investigate abnormal values.

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Linear scaling method

The same two-point equation works for current, voltage and integer raw counts. Reversed engineering ranges are supported; zero input or engineering spans are blocked. Values outside the endpoints are shown with an overrange advisory rather than silently clamped.

Frequently Asked Questions

How do you scale 4–20 mA?

Map 4 mA to the engineering minimum and 20 mA to the maximum with linear interpolation.

Can I calculate the inverse?

Yes. Select engineering unit → signal/raw value.

Which PLC raw count should I use?

Enter endpoints from the exact module configuration and manufacturer documentation; this tool supplies no vendor default.

What does out of range mean?

Verify sensor, wiring, module diagnostics and program handling before relying on the extrapolated value.