Convert 18 Pound/sq foot (psf) to Atmosphere (std) (atm).

18 Pound/sq foot equals 0.008506 Atmosphere (std). Multiply 18 by 0.0004725414.

What is 18 Pound/sq foot in Atmosphere (std)?

18 Pound/sq foot equals 0.008506 Atmosphere (std).

How many Atmosphere (std)s are in 1 Pound/sq foot?

There are exactly 0.0004725414 Atmosphere (std)s in 1 Pound/sq foot. This means the conversion factor from Pound/sq foot to Atmosphere (std) is 0.0004725414.

What is the formula to convert Pound/sq foot to Atmosphere (std)?

The formula to convert Pound/sq foot to Atmosphere (std) is: atm = psf × 0.0004725414. For example, to convert 10 Pound/sq feet to Atmosphere (std)s, you would multiply 10 by 0.0004725414.

What are the common uses of Pound/sq foot?

The Pound/sq foot is commonly used in pressure calculations, engineering and science, education.

What is 18 Pound/sq foot in Atmosphere (std)?

To convert 18 Pound/sq feet to Atmosphere (std)s, multiply by 0.0004725414. Therefore, 18 Pound/sq foot (psf) equals 0.008506 Atmosphere (std) (atm).

18 Pound/sq foot to Atmosphere (std)

Worked example: converting Pound/sq foot to Atmosphere (std)

Step 1 — start with the formula. atm = psf × 0.0004725414
Step 2 — substitute your figure. 18 psf × 0.0004725414
Step 3 — read the result. 18 psf = 0.008506 atm
Step 4 — check it in reverse. psf = atm × 2,116.216623674 returns 18.0005 psf, which matches the figure you started with.

Pressure Converter

29 units available

Decimals:

From

To

0.008506

18 psf = 0.008506 atm

Formula:

atm = psf × 0.0004725414

With your value: 18 psf = 0.00850575 atm

Other Pound/sq foot to Atmosphere (std) conversions

13 psf to atm 14 psf to atm 15 psf to atm 16 psf to atm 20 psf to atm 21 psf to atm 24 psf to atm Full Pound/sq foot to Atmosphere (std) converter

Pound/sq foot to Atmosphere (std) Conversion Table

Pound/sq foot (psf)	Atmosphere (std) (atm)
0.5	0.000236
1	0.000473
2	0.000945
5	0.002363
10	0.004725
15	0.007088
20	0.009451
25	0.011814
50	0.023627
100	0.047254
250	0.118135
500	0.236271
1000	0.472541

Atmosphere (std) to Pound/sq foot Conversion Table

Atmosphere (std) (atm)	Pound/sq foot (psf)
0.5	1,058.108312
1	2,116.216624
2	4,232.433247
5	10,581.083118
10	21,162.166237
15	31,743.249355
20	42,324.332473
25	52,905.415592
50	105,810.831184
100	211,621.662367
250	529,054.155918
500	1,058,108.311837
1000	2,116,216.623674

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

Atmosphere (std) (atm)

Pressure

Exact conversion

The standard atmosphere is exactly 101 325 Pa.

Source: Units accepted for use with the SI, SI Brochure Table 8

Bureau International des Poids et Mesures · Reviewed 2026-07-01

How to Convert Pound/sq foot to Atmosphere (std)

To convert from Pound/sq foot (psf) to Atmosphere (std) (atm), multiply the value by 0.0004725414.

Formula: atm = psf × 0.0004725414

Reverse: psf = atm × 2,116.216623674

Step-by-Step Example

Start with your value in Pound/sq foot. For example: 5 psf
Multiply by the conversion factor: 5 x 0.0004725414
The result is: 0.002363 atm

Pound/sq foot and Atmosphere (std) Relationship

This calculation facilitates standardized conversion between recognized units of pressure. Since 1 Pound/sq foot represents a fraction of a Atmosphere (std) (1 Atmosphere (std) ≈ 2,116.2166 Pound/sq feet), the Atmosphere (std) is the larger measurement interval. Understanding the relationship between Pound/sq foot and Atmosphere (std) is essential for accurate calculations in physics, engineering, commerce, and daily applications.

About Pound/sq foot

The Pound/sq foot (symbol: psf) is a recognized unit in the Standard measurement framework, utilized within pressure applications for precision and standardized data representation.

Common uses of Pound/sq foot: pressure calculations, engineering and science, education.

About Atmosphere (std)

One standard atmosphere equals 101,325 Pascals and represents the average air pressure at sea level.

Common uses of Atmosphere (std): diving, weather, chemistry.

Frequently Asked Questions

What is 18 Pound/sq foot in Atmosphere (std)?: 18 Pound/sq foot equals 0.008506 Atmosphere (std).
How many Atmosphere (std)s are in 1 Pound/sq foot?: There are exactly 0.0004725414 Atmosphere (std)s in 1 Pound/sq foot. This means the conversion factor from Pound/sq foot to Atmosphere (std) is 0.0004725414.
What is the formula to convert Pound/sq foot to Atmosphere (std)?: The formula to convert Pound/sq foot to Atmosphere (std) is: atm = psf × 0.0004725414. For example, to convert 10 Pound/sq feet to Atmosphere (std)s, you would multiply 10 by 0.0004725414.
What is a Pound/sq foot?: The Pound/sq foot (symbol: psf) is a recognized unit in the Standard measurement framework, utilized within pressure applications for precision and standardized data representation.
What is a Atmosphere (std)?: One standard atmosphere equals 101,325 Pascals and represents the average air pressure at sea level.
What are the common uses of Pound/sq foot?: The Pound/sq foot is commonly used in pressure calculations, engineering and science, education.