Decibel SPL (re 20 µPa) to Pascal Converter
0 dB SPL is 0.00002 Pa. Convert decibels SPL (dB SPL) to pascals (Pa) below: type a value and the result updates as you type.
dB SPL to Pa calculator
Result
Decibel SPL (re 20 µPa) to Pascal conversion
1 dB SPL ≈ 0.00002244036909 Paone decibel SPL in pascals
1 Pa ≈ 93.97940009 dB SPLone pascal in decibels SPL
Decibel SPL (re 20 µPa) (dB SPL): Sound pressure level in air: 20 times the base-10 logarithm of the RMS sound pressure divided by the reference pressure of 20 µPa. 0 dB SPL is 20 µPa, about the quietest sound a young adult can hear.
Pascal (Pa): SI derived unit: one newton per square meter.
Source:Decibel SPL (re 20 µPa): ISO 1683:2015, Acoustics: Preferred reference values for acoustical and vibratory levels; Pascal: SI Brochure, 9th edition (BIPM, 2019)
How to convert decibels SPL to pascals
To convert decibels SPL to pascals, divide the level by 20, raise 10 to that power, then multiply by 0.00002.
Formula
Pa = 0.00002 × 10^(dB SPL ÷ 20)
Examples
- 0 dB SPL = 0.00002 × 10^(0 ÷ 20) = 0.00002 Pa
- 60 dB SPL = 0.00002 × 10^(60 ÷ 20) = 0.02 Pa
- 94 dB SPL = 0.00002 × 10^(94 ÷ 20) ≈ 1.002374467 Pa
Decibel SPL (re 20 µPa) to Pascal conversion table
| Decibel SPL (re 20 µPa) (dB SPL) | Pascal (Pa) |
|---|---|
| 0 dB SPL | 0.00002 Pa |
| 10 dB SPL | 0.0000632455532 Pa |
| 20 dB SPL | 0.0002 Pa |
| 30 dB SPL | 0.000632455532 Pa |
| 40 dB SPL | 0.002 Pa |
| 50 dB SPL | 0.00632455532 Pa |
| 60 dB SPL | 0.02 Pa |
| 70 dB SPL | 0.0632455532 Pa |
| 80 dB SPL | 0.2 Pa |
| 90 dB SPL | 0.632455532 Pa |
| 94 dB SPL | 1.002374467 Pa |
| 100 dB SPL | 2 Pa |
| 110 dB SPL | 6.32455532 Pa |
| 120 dB SPL | 20 Pa |
| 130 dB SPL | 63.2455532 Pa |
| 140 dB SPL | 200 Pa |
Values rounded to 10 significant digits where needed.
Frequently asked questions
- What is 0 dB SPL in Pa?
- 0 dB SPL is 0.00002 Pa. To convert decibels SPL to pascals, divide the level by 20, raise 10 to that power, then multiply by 0.00002.
- How do I convert pascals to decibels SPL?
- To convert pascals to decibels SPL, divide the amount by 0.00002, take the base-10 logarithm, then multiply by 20. The formula is dB SPL = 20 × log₁₀(Pa ÷ 0.00002).
- Is this conversion exact?
- Yes. Both units have exact definitions and the factor 0.00002 is exact. Displayed results are only rounded when they have many decimal places.