Electrical Fundamentals
Shunt Resistor Calculator
Shunt Resistor converts the entered electrical measurements into shunt resistance. Use it to size an ideal current-measurement shunt.
Enter values for shunt resistance
Use one consistent electrical operating case for all fields.
How Shunt Resistor works
This worksheet evaluates Rshunt = Vshunt ÷ I. Shunt Resistor uses Full-scale shunt voltage, Full-scale current to report Shunt resistance.
With the loaded values, shunt resistance evaluates to 0.000750 Ω. Use separate cases for competing input values. Use Ohm's Law Calculator to find voltage and power from current and resistance.
Inputs for Shunt Resistor
Full-scale shunt voltage and Full-scale current belong to Shunt Resistor. Keep source units with full-scale shunt voltage.
Use the defaults to understand the output, then enter the real circuit or energy data.
- Full-scale shunt voltage
- Example entry: 0.075 V.
- Full-scale current
- Example entry: 100 A.
Reading the Shunt Resistor result
This output represents Shunt Resistor.
Compare the output with equipment limits and the applicable design margins.
Measurement and units
Use measured values and keep prefixes such as milli, kilo, and mega consistent before calculating. Check prefixes on full-scale shunt voltage.
Do not compare cases built from different unit prefixes or measurement locations.
Limits of this calculation
Select a real shunt with adequate power rating and a suitable Kelvin connection. Output voltage can be checked in Voltage Divider Calculator.
Unlisted circuit behavior remains outside the computed result. Unentered effects remain outside Shunt Resistor.