4–20 mA calculator

Signals and scaling

Convert current, percentage and engineering values in real time.

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Configuration

Instrument range

Value at 4 mA LRV

Value at 20 mA URV

Unit

Span 10 barIncreasing ↗

Calculate from

Input current

Use a comma or decimal point. For negative values, tap +/−.

Transmitter signals failure per NAMUR NE 43Failure ≤ 3.6 mA or ≥ 21 mA; measurement from 3.8 to 20.5 mA. Leave unticked if unsure.

Use an example range

Use the same endpoints configured in the instrument and PLC.

Conversion result

Live

Current

8.4mA

Percentage

27.5%

Engineering value

2.75bar

Within range · linear conversion

Signal curve

0 to 10 bar

Explore the signal

Drag or use the arrow keys

4 mA8 mA12 mA16 mA20 mA

Within range · linear conversion

8.4 mA = 27.5% of range ≈ 2.75 bar (range 0 to 10 bar).

Reading within the configured range.

8.4 mA 2.75 bar

Range table

Reference points for simulation and scale checks.

Current	Percentage	Engineering (bar)
4 mA	0 %	0
6 mA	12.5 %	1.25
8 mA	25 %	2.5
10 mA	37.5 %	3.75
12 mA	50 %	5
14 mA	62.5 %	6.25
16 mA	75 %	7.5
18 mA	87.5 %	8.75
20 mA	100 %	10

Calculated values. These are not calibration measurements.

Current8.4 mA

Percentage27.5 %

Engineering2.75 bar

CONVERSION REPORT

Linear 4–20 mA conversion

Configuration and result

Range: 0 to 10 bar · Input: Input current

Current

8.4mA

Percentage

27.5%

Engineering value

2.75bar

Within range · linear conversion. Reading within the configured range.

Range curve

Reference table

Current (mA)	Percentage (%)	Engineering (bar)
4	0	0
6	12.5	1.25
8	25	2.5
10	37.5	3.75
12	50	5
14	62.5	6.25
16	75	7.5
18	87.5	8.75
20	100	10

Linear mathematical conversion. Points are calculated references, not measurements. This report is not a calibration certificate.