Calculator

Analog Scaling Calculator

Scale PLC raw input values into engineering units using the standard linear interpolation formula. Works for 4-20 mA, 0-10 V, and vendor-specific raw ranges.

Formula-backed output

The calculation logic is isolated in a typed module so it can be reused by future API routes, tests, and downloadable references.

Analog Scaling Inputs

Use raw counts and engineering limits from the card or PLC tag.

Raw valueCurrent analog input countRaw lowRaw count at engineering lowRaw highRaw count at engineering highEU lowMinimum engineering valueEU highMaximum engineering valueDecimalsDisplay precision

Clamp output to engineering rangeUseful when raw values can drift below zero scale or above full scale.

Result

Linear interpolation result for the current values.

Scaled value

80.61

In range80.606% span

Formula

EU = EULow + ((Raw - RawLow) / (RawHigh - RawLow)) * (EUHigh - EULow)

Engineering note

Confirm raw ranges against the exact card, module configuration, and signal type before using scaled values for commissioning decisions. Different PLC platforms use different defaults and overrange behavior.