Instrumentation Signal · Free Calculator
Analog Signal Converter Calculator (Any Range to Any Range)
Convert a value from one analog range to another, such as 0 to 10 V to 4 to 20 mA, or 4 to 20 mA to an engineering range, as a signal isolator or converter does.
0 to 10 V4 to 20 mA1 to 5 VAny range
Output value14.4 mA
Percent of range65.00 %
How this result was calculated
- % = (x − in low) ÷ (in high − in low) = 65.00 %
- y = out low + % × (out high − out low) = 14.4 mA
Conversion table
| % | Input (V) | Output (mA) |
|---|---|---|
| 0 % | 0 | 4 |
| 25 % | 2.5 | 8 |
| 50 % | 5 | 12 |
| 75 % | 7.5 | 16 |
| 100 % | 10 | 20 |
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Linear Scaling
y = ylow + (x − xlow) ÷ (xhigh − xlow) × (yhigh − ylow)
Worked example
6.5 V on a 0 to 10 V input is 65 %, which a converter outputs as 4 + 0.65 × 16 = 14.4 mA.
Key insight: converting a 0 to 10 V signal to 4 to 20 mA near the source makes it immune to voltage drop and much less sensitive to noise on long cables.
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Frequently Asked Questions
How do I convert 0 to 10 V to 4 to 20 mA?
mA = 4 + 1.6 × V. 5 V gives 12 mA.
How do I convert 4 to 20 mA to 1 to 5 V?
Pass the current through a 250 Ω resistor: 4 mA gives 1 V and 20 mA gives 5 V.
Is this the same as PLC scaling?
Yes, the same linear equation; the PLC analog scaling calculator also handles raw counts.
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