Convert Kilopascals to Inches of Mercury
1 kilopascal (kPa) equals 0.295299833 inches of mercury (inHg).
1 kPa = 0.295299833 inHg
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk kilopascal to inch of mercury converter to paste a column from Excel.
How to Convert Kilopascal to Inch of Mercury
- 1 kPa = 0.295299833 inHg
- 1 inHg = 3.38638864 kPa
- Example: convert 15 kPa to inHg: 15 kPa = 15 × 0.295299833 inHg = 4.429497495 inHg
Reference conditions. inHg: Conventional mercury column: ρ = 13 595.1 kg/m³ and gₙ = 9.80665 m/s² (≈ mercury at 0 °C / 32 °F).
Formula
inHg = kPa × 0.2952998330101
or inHg = kPa ÷ 3.386388640341
Derivation from SI units:
- 1 kPa = 10³ Pa
- 1 inHg = 13 595.1 kg/m³ × 9.80665 m/s² × 0.0254 m = 3386.388640341 Pa
- 1 kPa = 1000 Pa ÷ 3386.388640341 Pa per inHg = 0.2952998330101 inHg
Both units are defined exactly, so the factor is exact. Kilopascal definition: kilopascal; Inch of Mercury definition: inch of mercury.
Worked examples
- Standard pressure, 101.325 kPa, is 29.92125558 inHg.
101.325 kPa × 0.295299833 = 29.92125558 inHg - A barometric pressure of 95 kPa is 28.05348414 inHg.
95 kPa × 0.295299833 = 28.05348414 inHg
Kilopascal to Inch of Mercury conversion table
| Kilopascals (kPa) | Inches of Mercury (inHg) |
|---|---|
| 0.1 kPa | 0.0295299833 inHg |
| 0.25 kPa | 0.07382495825 inHg |
| 0.5 kPa | 0.1476499165 inHg |
| 1 kPa | 0.295299833 inHg |
| 2 kPa | 0.590599666 inHg |
| 2.5 kPa | 0.7382495825 inHg |
| 5 kPa | 1.476499165 inHg |
| 10 kPa | 2.95299833 inHg |
| 20 kPa | 5.90599666 inHg |
| 50 kPa | 14.76499165 inHg |
| 100 kPa | 29.5299833 inHg |
| 101.325 kPa | 29.92125558 inHg |
| 150 kPa | 44.29497495 inHg |
| 200 kPa | 59.0599666 inHg |
| 220 kPa | 64.96596326 inHg |
| 250 kPa | 73.82495825 inHg |
| 300 kPa | 88.5899499 inHg |
| 350 kPa | 103.3549416 inHg |
| 400 kPa | 118.1199332 inHg |
| 500 kPa | 147.6499165 inHg |
| 600 kPa | 177.1798998 inHg |
| 700 kPa | 206.7098831 inHg |
| 800 kPa | 236.2398664 inHg |
| 1000 kPa | 295.299833 inHg |
| 2000 kPa | 590.599666 inHg |
Where it's used
Barometric pressures from metric weather stations in kPa are converted to inHg for US weather reports and aviation.
Kilopascal to other pressure units
| Conversion | 1 kPa equals |
|---|---|
| kilopascal to pascal | 1000 Pa |
| kilopascal to megapascal | 0.001 MPa |
| kilopascal to psi | 0.1450377377 psi |
| kilopascal to bar | 0.01 bar |
| kilopascal to millibar | 10 mbar |
| kilopascal to decibar | 0.1 dbar |
| kilopascal to torr | 7.500616827 Torr |
| kilopascal to millimeter of mercury | 7.500615758 mmHg |
| kilopascal to millimeter of water | 101.9716213 mmH₂O |
| kilopascal to centimeter of water | 10.19716213 cmH₂O |
| kilopascal to inch of water | 4.01463076 inH₂O |
| kilopascal to inch of water (60 °F) | 4.01864652 inH₂O (60 °F) |
| kilopascal to inch of mercury | 0.295299833 inHg |
| kilopascal to atmosphere | 0.009869232667 atm |
| kilopascal to barye | 10000 Ba |
Frequently asked questions
How many inHg is 100 kPa?
100 kPa = 29.5299833 inHg.
How many inches of mercury are in 1 kilopascal?
1 kPa = 0.295299833 inHg.
How do I convert kilopascals to inches of mercury?
Multiply the value in kPa by 0.295299833, or divide it by 3.38638864. For example, 15 kPa × 0.295299833 = 4.429497495 inHg.
Is the kPa to inHg conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7, SI prefixes.
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "inch of mercury, conventional (inHg)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Kilopascals to Inches of Mercury. Retrieved October 17, 2026, from https://scientificconverters.com/pressure/kilopascal-to-inch-of-mercury/
IEEE
Scientific Converters, "Convert Kilopascals to Inches of Mercury," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/pressure/kilopascal-to-inch-of-mercury/