Convert Inches of Water to Standard Atmospheres
Convert inches of water to standard atmospheres (inH₂O to atm) with our instant calculator. 1 inH₂O = 0.002458 atm. Includes exact formula and reference tables.
How to Convert Inches of Water to Standard Atmospheres (inH₂O to atm)
1 Inch of Water (inH₂O) is equal to 0.002458 Standard Atmospheres (atm). Multiply the inch of water value by 0.002458316408
Unit Definitions & Metrology Context
The SI unit of pressure is the pascal (Pa). Standard sea-level atmosphere is defined as 101,325 Pa (1.01325 bar or ~14.696 psi).
About Inches of Water (inH₂O): Inch of Water (inH₂O) is a unit in the Pressure measurement category. It is widely used in hvac duct & fan static pressure. Relative to the pressure base unit, 1 inH₂O equals 249.08891 Pascals (Pa).
About Standard Atmospheres (atm): Standard Atmosphere (atm) is a unit in the Pressure measurement category. It is a standard everyday unit of pressure measurement. Relative to the pressure base unit, 1 atm equals 101325 Pascals (Pa).
Need to convert in the opposite direction? Visit our Convert Standard Atmospheres to Inches of Water (atm to inH₂O) calculator (1 atm = 406.782462 inH₂O).
Step-by-Step Worked Examples (inH₂O to atm)
- Convert 5 Inches of Water to Standard Atmospheres: Applying the formula (atm = inH₂O × 0.002458316408): starting with 5 inH₂O, multiply the inch of water value by 0.002458316408 to get 0.0123 atm.
- Convert 10 Inches of Water to Standard Atmospheres: Applying the formula (atm = inH₂O × 0.002458316408): starting with 10 inH₂O, multiply the inch of water value by 0.002458316408 to get 0.0246 atm.
- Convert 50 Inches of Water to Standard Atmospheres: Applying the formula (atm = inH₂O × 0.002458316408): starting with 50 inH₂O, multiply the inch of water value by 0.002458316408 to get 0.1229 atm.
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Frequently Asked Questions
Verified answers and formulas for converting inches of water to standard atmospheres.
There are 0.002458 standard atmospheres (atm) in 1 inch of water (inH₂O). Conversely, 1 standard atmosphere equals 406.782462 inches of water.
To convert inches of water (inH₂O) to standard atmospheres (atm), use the formula: atm = inH₂O × 0.002458316408. Multiply the inch of water value by 0.002458316408. For example, 10 inH₂O equals 0.0246 atm.
To convert in the reverse direction from standard atmospheres (atm) to inches of water (inH₂O), use the inverse formula: inH₂O = atm × 406.7824617. Multiply the standard atmosphere value by 406.7824617 (1 atm = 406.782462 inH₂O).
Both inch of water and standard atmosphere measure pressure. Inch of Water (inH₂O) is a unit in the Pressure measurement category. It is widely used in hvac duct & fan static pressure. Relative to the pressure base unit, 1 inH₂O equals 249.08891 Pascals (Pa). Standard Atmosphere (atm) is a unit in the Pressure measurement category. It is a standard everyday unit of pressure measurement. Relative to the pressure base unit, 1 atm equals 101325 Pascals (Pa).
1 bar equals approximately 14.5038 PSI. For car tires, 2.2 bar is roughly 32 PSI.