Pound/sq foot to mmH2O (4°C) Converter

Pressure Converter

29 units available

Decimals:

From

To

4.882428

1 psf = 4.882428 mmH2O

Formula:

mmH2O = psf × 4.8824276364

With your value: 1 psf = 4.88242764 mmH2O

Other Pound/sq foot to mmH2O (4°C) conversions

2 psf to mmH2O 3 psf to mmH2O 4 psf to mmH2O 5 psf to mmH2O 6 psf to mmH2O 7 psf to mmH2O 8 psf to mmH2O

Pound/sq foot to mmH2O (4°C) Conversion Table

Pound/sq foot (psf)	mmH2O (4°C) (mmH2O)
0.5	2.441214
1	4.882428
2	9.764855
5	24.412138
10	48.824276
15	73.236415
20	97.648553
25	122.060691
50	244.121382
100	488.242764
250	1,220.606909
500	2,441.213818
1000	4,882.427636

mmH2O (4°C) to Pound/sq foot Conversion Table

mmH2O (4°C) (mmH2O)	Pound/sq foot (psf)
0.5	0.102408
1	0.204816
2	0.409632
5	1.024081
10	2.048161
15	3.072242
20	4.096323
25	5.120404
50	10.240807
100	20.481614
250	51.204036
500	102.408072
1000	204.816144

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Pound/sq foot (psf)

Pressure

Exact conversion

Derived from the pascal (1 Pa = 1 N/m²). The standard atmosphere is exactly 101 325 Pa.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

mmH2O (4°C) (mmH2O)

Pressure

Exact conversion

Derived from the pascal (1 Pa = 1 N/m²). The standard atmosphere is exactly 101 325 Pa.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Pound/sq foot to mmH2O (4°C)

To convert from Pound/sq foot (psf) to mmH2O (4°C) (mmH2O), multiply the value by 4.8824276364.

Formula: mmH2O = psf × 4.8824276364

Reverse: psf = mmH2O × 0.2048161436

Step-by-Step Example

Start with your value in Pound/sq foot. For example: 5 psf
Multiply by the conversion factor: 5 x 4.8824276364
The result is: 24.412138 mmH2O

About Pound/sq foot

The pound/sq foot (psf) is a unit of pressure and stress. One pound/sq foot equals 47.88025898 pascals. UnitConvertLab converts it against every other pressure unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: pressure calculations, engineering and science, education.

About mmH2O (4°C)

The mmh2o (4°c) (mmH2O) is a unit of pressure and stress. One mmh2o (4°c) equals 9.80665 pascals. UnitConvertLab converts it against every other pressure unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: pressure calculations, engineering and science, education.

Frequently Asked Questions

How many mmH2O (4°C) are in 1 Pound/sq foot?

There are exactly 4.8824276364 mmH2O (4°C) in 1 Pound/sq foot. This means the conversion factor from Pound/sq foot to mmH2O (4°C) is 4.8824276364.

What is the formula to convert Pound/sq foot to mmH2O (4°C)?

The formula to convert Pound/sq foot to mmH2O (4°C) is: mmH2O = psf × 4.8824276364. For example, to convert 10 Pound/sq foot to mmH2O (4°C), you would multiply 10 by 4.8824276364.

What is a Pound/sq foot?