This calculator determines the required power (in milliwatts) needed to drive your headphones to a desired listening level, based on impedance, sensitivity, and desired volume.
Start with your values, or try a preset.
Enter Headphone Impedance (Ohms), Headphone Sensitivity (dB/mW), and Desired Listening Volume (dB SPL) in the units shown.
Read Required Power (mW), Required Power (W), Required Voltage (V), and Required Current (A) in the results panel. Results update as you change the inputs.
Choose a preset to load an example, then adjust the values for your situation.
See the inputs and their calculated results.
Headphone Impedance (Ohms): 300; Headphone Sensitivity (dB/mW): 96; Desired Listening Volume (dB SPL): 90
Required Power (mW): 0.2511886432 mW; Required Power (W): 0.0002511886432 W; Required Voltage (V): 0.2745115534 V; Required Current (A): 0.0009150385113 A
Headphone Impedance (Ohms): 32; Headphone Sensitivity (dB/mW): 100; Desired Listening Volume (dB SPL): 90
Required Power (mW): 0.1 mW; Required Power (W): 0.0001 W; Required Voltage (V): 0.05656854249 V; Required Current (A): 0.001767766953 A
Headphone Impedance (Ohms): 32; Headphone Sensitivity (dB/mW): 100; Desired Listening Volume (dB SPL): 80
Required Power (mW): 0.01 mW; Required Power (W): 0.00001 W; Required Voltage (V): 0.01788854382 V; Required Current (A): 0.0005590169944 A
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