Headphone Power Calculator (Sensitivity, Impedance, Loudness)

This headphone power calculator helps determine the exact amount of power required to drive headphones effectively by considering sensitivity and impedance.

Let’s say you have headphones with a sensitivity of 90 dB/mW and an impedance of 32 ohms. The calculator can help determine how much power is needed to reach a desired volume level, such as 110 dB, from an amplifier or audio source.

Headphone Power Calculator

Sensitivity (dB/mW)	Impedance (Ω)	Desired Volume (dB)	Required Power (mW)
90	32	110	100
95	250	105	10
102	64	115	19.95
88	16	100	15.85
92	40	108	50
98	150	112	25
85	24	95	35.48
100	300	118	50

Headphone Power Calculation Formula

The formula for calculating headphone power is:

P = 10^((dB - S) / 10)

Where:

• P = Power in milliwatts (mW)
• dB = Desired volume level in decibels
• S = Headphone sensitivity in dB/mW

For headphones with 90 dB/mW sensitivity, to reach 110 dB: P = 10^((110 – 90) / 10) = 100 mW

What is Headphone Power?

Headphone power refers to the electrical energy required to drive headphones and produce sound at a specific volume level. It’s typically measured in milliwatts (mW) or watts (W).

What is Headphone Sensitivity?

Headphone sensitivity measures how efficiently headphones convert electrical power into sound. It’s expressed in decibels per milliwatt (dB/mW) and indicates how loud headphones will be at a given power input.

What is Headphone Impedance (Ohms)?

Headphone impedance is the electrical resistance of headphones, measured in ohms (Ω). It affects how much voltage and current are needed to drive the headphones. Higher impedance headphones typically require more voltage to reach the same volume level as lower impedance ones.

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