Electronics / Free browser tool

Headphone Voltage from Power

Calculate voltage required for a specified resistive-load power.

Your result
Required voltage (V RMS)
0.8944272

How this works

V RMS = √(mW × R/1000)

Use the result carefully

Not a recommendation to apply that power; check equipment ratings and keep listening levels conservative.

Calculations run on your device. No audio uploads, account, or email required. Numerical outputs are rounded for display; these tools do not analyze a recording unless explicitly stated.

Report a calculation issue →

Related tools