# Sense resistor / current shunt + current sense amplifier calculator

Calculate the output voltage of a current sense amplifier combined with a current shunt resistor – formula included.

TechOverflow calculators:
You can enter values with SI suffixes like 12.2m (equivalent to 0.012) or 14k (14000) or 32u (0.000032).
The results are calculated while you type and shown directly below the calculator, so there is no need to press return or click on a Calculate button. Just make sure that all inputs are green by entering valid values.

Don’t need a current sense amplifier? See our Sense resistor / current shunt calculator.

This calculator allows you to find out which sense resistor and current sense amplifier you need to use to obtain a specific amplifier output voltage at a specific current.

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$$R_{\text{sense}} = \frac{U_{\text{drop}}}{I_{\text{sense}} \cdot G_{\text{current sense amplifier}}}$$ $$U_{\text{sense,drop}} = I_{\text{sense}} \cdot R_{\text{sense}}$$ $$P_{\text{sense}} = {I_{\text{sense}}}^2 \cdot R_{\text{sense}}$$