What is the base SI unit for sound?

The primary reference unit for sound in this converter is the Pascal (Sound Pressure) (Pa). All 4 supported sound units are anchored to this standard.

Are these sound conversion factors verified?

Yes, all sound conversion constants on UnitConvertersGo are verified against NIST Special Publication 811 and ISO/IEC 80000 international metrology standards.

Sound Converter

Enter a value below to convert between metric, imperial, and standard sound units.

Convert Sound

Enter a value and select the units to convert between pascals (pa), millipascals (mpa), and micropascals (µpa).

Instant conversion

Value

From

Result

10,000 mPa

10 Pa = 10,000 mPa

10 Pa = 10,000 mPa = 10,000,000 µPaGet Widget

You can change the units using the dropdowns above or click on a unit button.

Suggested Conversions

Common Sound Reference Points

Here are some common sound values in Pascal (Sound Pressure) (Pa), Millipascal (mPa), and Micropascal (µPa). Click any preset value or arrow to load it into the converter.

Description	Pascal (Sound Pressure) (Pa)	Millipascal (mPa)	Micropascal (µPa)
1 pascal (sound pressure) unit	1	1,000	1,000,000
5 pascals (pa)	5	5,000	5,000,000
10 pascals (pa) benchmark	10	10,000	10,000,000
25 pascals (pa)	25	25,000	25,000,000
50 pascals (pa)	50	50,000	50,000,000
100 pascals (pa) reference	100	100,000	100,000,000

Sound Conversion Formulas

Use the following formulas to convert between pascals (pa), millipascals (mpa), and micropascals (µpa).

Pascals (Pa) to Millipascals (mPa)

mPa = Pa × 1,000

Millipascals (mPa) to Pascals (Pa)

Pa = mPa × 0.001

Pascals (Pa) to Micropascals (µPa)

µPa = Pa × 1,000,000

Example: Convert 10 Pascals (Pa) (Pa) to Millipascals (mPa) (mPa)

1 Pa = 1,000 mPa

10 Pa × 1,000 = 10,000 mPa

All sound conversions are anchored to the international SI base unit (Pascal (Sound Pressure)) for full scientific and engineering accuracy.

More Pascal & Millipascal Conversions

Convert from Pascals

Convert to Millipascals

Frequently Asked Questions

1 pascal (sound pressure) (Pa) equals 1,000 millipascals (mpa) (mPa). Multiply your pascal (sound pressure) value by 1,000 or enter it in the Sound Converter above for instant calculation.

Sound Converter

Quick Info

Pascal (Sound Pressure) (Pa) is a primary sound unit used globally across science, commerce, and daily measurement.
Millipascal (mPa) is widely used alongside Pa for practical sound specifications and conversions.
Pascal (Sound Pressure) (Pa) serves as the standardized reference base unit anchoring all 4 units in this category.
Verified accuracy: All conversion factors follow official NIST SP 811 and ISO/IEC 80000 metrology constants.

Sound Units Comparison

Pascal (Sound Pressure) (Pa)

SI unit of acoustic sound pressure (1 Pa ≈ 94 dB SPL).

Millipascal (mPa)

Equal to 0.001 Pa.

Micropascal (µPa)

Acoustics reference pressure unit (20 µPa = 0 dB SPL threshold of human hearing).

References

[1]NIST · NIST HB 133 / SP 811
Source
[2]BIPM · BIPM SI-9
Source
[3]NIST SP 811 · NIST SP 811 App. B.9
Source

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All Sound Conversion Calculators (6)

Select any dedicated sound pair below for worked examples and printable tables

Pascals (Pa) to Millipascals (mPa) (Pa to mPa)Millipascals (mPa) to Pascals (Pa) (mPa to Pa)Pascals (Pa) to Micropascals (µPa) (Pa to µPa)Micropascals (µPa) to Pascals (Pa) (µPa to Pa)Pascals (Pa) to Baryes (Microbars) (Pa to µbar)Baryes (Microbars) to Pascals (Pa) (µbar to Pa)

Category Conversion Matrix

Simultaneous comparison of 4 units in this category

Pascal (Sound Pressure) (Pa)

Millipascal (mPa)

1,000

Micropascal (µPa)

1,000,000

Dyne per Sq. Centimeter (Barye) (µbar)

Sound Unit Definitions & Symbols

Pascal (Sound Pressure) (Pa)

SI unit of acoustic sound pressure (1 Pa ≈ 94 dB SPL).

Millipascal (mPa)

METRIC

Equal to 0.001 Pa.

Micropascal (µPa)

METRIC

Acoustics reference pressure unit (20 µPa = 0 dB SPL threshold of human hearing).

Dyne per Sq. Centimeter (Barye) (µbar)

METRIC

CGS acoustic pressure unit equal to 0.1 Pa.

References

NIST · BIPM · ISO

[1]
NIST (NIST HB 133 / SP 811)·Checking the Net Contents of Packaged Goods, Handbook 133 - 2019 Edition & NIST SP 811
NIST HB 133 Standard
[2]
BIPM (BIPM SI-9)·The International System of Units (SI Brochure, 9th Edition)
BIPM SI Brochure
[3]
NIST SP 811 (NIST SP 811 App. B.9)·NIST Guide to the SI, Appendix B.9: Factors for Units Listed by Kind of Quantity or Field of Science
NIST SP 811 Appendix B.9

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