Inches of Water (inH₂O)	Kilopascals (kPa)
1 inH₂O	0.2491 kPa
2 inH₂O	0.4982 kPa
5 inH₂O	1.2454 kPa
10 inH₂O	2.4909 kPa
25 inH₂O	6.2272 kPa
50 inH₂O	12.4544 kPa
100 inH₂O	24.9089 kPa
250 inH₂O	62.2722 kPa
500 inH₂O	124.5445 kPa
1000 inH₂O	249.0889 kPa

Convert Inches of Water to Kilopascals

Convert inches of water to kilopascals (inH₂O to kPa) with our instant calculator. 1 inH₂O = 0.249089 kPa. Includes exact formula and reference tables.

How to Convert Inches of Water to Kilopascals (inH₂O to kPa)

1 Inch of Water (inH₂O) is equal to 0.249089 Kilopascals (kPa). Multiply the inch of water value by 0.24908891

Quick Answer 1 inH₂O = 0.249089 kPa

Formula kPa = inH₂O × 0.24908891

Inverse Factor 1 kPa = 4.014631 inH₂O

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 Kilopascals (kPa): Kilopascal (kPa) is a unit in the Pressure measurement category. It is a standard everyday unit of pressure measurement. Relative to the pressure base unit, 1 kPa equals 1000 Pascals (Pa).

Need to convert in the opposite direction? Visit our Convert Kilopascals to Inches of Water (kPa to inH₂O) calculator (1 kPa = 4.014631 inH₂O).

Step-by-Step Worked Examples (inH₂O to kPa)

Convert 5 Inches of Water to Kilopascals: Applying the formula (kPa = inH₂O × 0.24908891): starting with 5 inH₂O, multiply the inch of water value by 0.24908891 to get 1.2454 kPa.
Convert 10 Inches of Water to Kilopascals: Applying the formula (kPa = inH₂O × 0.24908891): starting with 10 inH₂O, multiply the inch of water value by 0.24908891 to get 2.4909 kPa.
Convert 50 Inches of Water to Kilopascals: Applying the formula (kPa = inH₂O × 0.24908891): starting with 50 inH₂O, multiply the inch of water value by 0.24908891 to get 12.4544 kPa.

Popular Pressure Conversions

Pound per Square Inch ⇄ Bar

Multiply PSI by ~0.0689476 to convert to bar.

Bar ⇄ Pound per Square Inch

Multiply bar by ~14.5038 to find pressure in pounds per square inch (PSI).

Kilopascal ⇄ Pound per Square Inch

1 PSI equals approximately 6.89476 kilopascals (kPa).

Standard Atmosphere ⇄ Pound per Square Inch

1 standard atmosphere equals approximately 14.6959 PSI.

Frequently Asked Questions

Verified answers and formulas for converting inches of water to kilopascals.

How many kilopascals are in 1 inch of water?

There are 0.249089 kilopascals (kPa) in 1 inch of water (inH₂O). Conversely, 1 kilopascal equals 4.014631 inches of water.

How do you convert inches of water to kilopascals?

To convert inches of water (inH₂O) to kilopascals (kPa), use the formula: kPa = inH₂O × 0.24908891. Multiply the inch of water value by 0.24908891. For example, 10 inH₂O equals 2.4909 kPa.

How do I convert back from kilopascals to inches of water?

To convert in the reverse direction from kilopascals (kPa) to inches of water (inH₂O), use the inverse formula: inH₂O = kPa × 4.01463076. Multiply the kilopascal value by 4.01463076 (1 kPa = 4.014631 inH₂O).

What is the difference between inch of water (inH₂O) and kilopascal (kPa)?

Both inch of water and kilopascal 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). Kilopascal (kPa) is a unit in the Pressure measurement category. It is a standard everyday unit of pressure measurement. Relative to the pressure base unit, 1 kPa equals 1000 Pascals (Pa).

How many PSI is in 1 bar?

1 bar equals approximately 14.5038 PSI. For car tires, 2.2 bar is roughly 32 PSI.