Sense resistor / current shunt calculator

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.

Too much power dissipation? You need to use a current sense amplifier ! See our Sense resistor / current shunt + current sense amplifier calculator !

Know the value of your sense resistor already? Use our Sense resistor power dissipation calculator

This calculator allows you to find out which sense resistor you need to drop a specified voltage at a given current. Additionally it computes the power dissipated in the sense resistor.



R_{\text{sense}} = \frac{U_{\text{drop}}}{I_{\text{sense}}} P_{\text{sense}} = I_{\text{sense}}² \cdot R_{\text{sense}}