Kilopascal to inH2O Converter

Pressure · unit-converter

Convert Kilopascal to inH2O with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations bridge through pascal with fixed definitions (standard atmosphere = 101,325 Pa; torr and mmHg = atm/760; plus industrial/manometer units like kgf/cm², inHg, inH2O, and mmH2O).

About Kilopascal

The kilopascal (kPa) equals 1,000 Pa. It appears in HVAC, building science, and many technical specifications.

About inH2O

Inches of water column (inH2O) is common in low-pressure HVAC and duct static-pressure measurements.

How to convert kilopascal to inch of water (inh2o, 4 °c)

1 kilopascal equals 4.014630759755623 inh2o in this tool (via pascal):

1 kpa = (1000 Pa ÷ 249.08891 Pa) inh2o = 4.014630759755623 inh2o

Each kilopascal carries 1000 Pa and each inh2o 249.08891 Pa, so one kpa equals 1000 ÷ 249.08891 inh2o.

Let p(kpa) be pressure in Kilopascal (kpa), and p(inh2o) in inH2O (inh2o). Then:

p(inh2o) = p(kpa) × (1000 / 249.08891)

Equivalently, divide by how many kpa fit into one inh2o (Pa per inh2o divided by Pa per kpa):

p(inh2o) = p(kpa) ÷ 0.24908891

Examples

Example #1: Convert 1 kpa to inh2o

1 kpa = 1 kpa × (1000/249.08891) inh2o = 4.0146307598 inh2o

1 kpa = 1 kpa ÷ 0.24908891 = 4.0146307598 inh2o

1 kpa × (1,000/249.08891) = 4.014631 inh2o

Example #2: Convert 10 kpa to inh2o

10 kpa = 10 kpa × (1000/249.08891) inh2o = 40.1463075976 inh2o

10 kpa = 10 kpa ÷ 0.24908891 = 40.1463075976 inh2o

10 kpa × (1,000/249.08891) = 40.146308 inh2o

Summary

To convert Kilopascal to inH2O, multiply the value in kpa by (1000 Pa per kpa) / (249.08891 Pa per inh2o). Equivalently: value_inh2o = value_kpa × (1000 / 249.08891). Numerically, 1 kpa equals 4.014630759755623 inh2o.

Relationship context

Both Kilopascal and inH2O are converted by fixed multiples of the pascal. Multiplying by (Pa per kpa) ÷ (Pa per inh2o) gives the same result as passing through pascal, keeping bar, atm, PSI, kPa, hPa, torr, and mmHg consistent on the hub.

Conversion tables

Kilopascal (kpa)inH2O (inh2o)
0.10.401463076
14.0146307598
28.0292615195
312.0438922793
416.058523039
520.0731537988
624.0877845585
728.1024153183
832.117046078
936.1316768378
Kilopascal (kpa)inH2O (inh2o)
1040.1463075976
2080.2926151951
30120.438922793
40160.58523039
50200.731537988
60240.877845585
70281.024153183
80321.17046078
90361.316768378
100401.463075976