Decibels to watts per square meter
Type a value in dB to get it in W/m² instantly.
1×10⁻⁶W/m²
That's about the same as normal conversation. That carries about 1× the sound energy of ordinary conversation.
What it means
How loud is that?
Decibels here are dB SPL, referenced to 20 micropascals, the quietest sound a young ear can detect.
The math
How to convert dB to W/m²
Decibels are logarithmic: dB = 20 × log₁₀(pressure ÷ 20 µPa). Going back, pressure = 20 µPa × 10^(dB ÷ 20).
Example: 60 dB = 1×10⁻⁶ W/m².
Every unit
Your sound level in every unit
Tables
dB to W/m² conversion table
| dB | W/m² |
|---|---|
| 10 dB | 1×10⁻¹¹ W/m² |
| 20 dB | 1×10⁻¹⁰ W/m² |
| 30 dB | 1×10⁻⁹ W/m² |
| 40 dB | 1×10⁻⁸ W/m² |
| 50 dB | 1×10⁻⁷ W/m² |
| 60 dB | 1×10⁻⁶ W/m² |
| 70 dB | 1×10⁻⁵ W/m² |
| 80 dB | 1×10⁻⁴ W/m² |
| 85 dB | 0.000316228 W/m² |
| 90 dB | 0.001 W/m² |
| 100 dB | 0.01 W/m² |
| 110 dB | 0.1 W/m² |
| 120 dB | 1 W/m² |
| 130 dB | 10 W/m² |
W/m² to dB conversion table
| W/m² | dB |
|---|---|
| 10 W/m² | 130 dB |
| 20 W/m² | 133.01 dB |
| 30 W/m² | 134.771 dB |
| 40 W/m² | 136.021 dB |
| 50 W/m² | 136.99 dB |
| 60 W/m² | 137.782 dB |
| 70 W/m² | 138.451 dB |
| 80 W/m² | 139.031 dB |
| 85 W/m² | 139.294 dB |
| 90 W/m² | 139.542 dB |
| 100 W/m² | 140 dB |
| 110 W/m² | 140.414 dB |
| 120 W/m² | 140.792 dB |
| 130 W/m² | 141.139 dB |
Quick answers
Quick answers
- How many W/m² is 1 dB?
- 1 dB is 1.259×10⁻¹² W/m².
- How many W/m² is 10 dB?
- 10 dB is 1×10⁻¹¹ W/m².
- How many W/m² is 60 dB?
- 60 dB is 1×10⁻⁶ W/m².
The units
About these units
Decibels (dB)
The standard measure of sound level, referenced to the threshold of hearing.
Watts per square meter (W/m²)
Sound intensity: energy flowing through an area. The hearing threshold is 10⁻¹² W/m².
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