Convert Inches of Mercury to Kilopounds per Square Inch
Convert Inches of Mercury (inHg) to Kilopounds per Square Inch (ksi) instantly and accurately.
Conversion Formula
ksi = inHg × 0.0004911541475
About Inches of Mercury
One inch of mercury (inHg) ≈ 3,386 Pa - the primary barometric pressure unit in US aviation and meteorology. ASOS weather stations, METARs, and altimeter settings in the US report in inHg. Standard sea-level pressure is 29.92 inHg. Altimeters are set to local QNH in inHg to maintain altitude reference. US barometers for home weather stations display inHg. Typical pressure range: 28.5-31.0 inHg in continental weather systems. Record low: ~25.70 inHg (Typhoon Tip, 1979). 1 inHg = 3,386.39 Pa.
About Kilopounds per Square Inch
One ksi (kilopound per square inch) = 1,000 psi ≈ 6.895 MPa - the standard engineering stress unit in the US. ASTM A36 structural steel: 36 ksi yield, 58-80 ksi tensile. ASTM A325 high-strength bolts: 92 ksi proof load. AISC steel construction tables, FAA/MIL-SPEC aerospace allowables, and ASME Section VIII pressure vessel design all use ksi. Fracture toughness (K_IC) for steels: 50-200 ksi·√in. Convenient because it keeps large structural stresses as manageable 3-digit numbers. 1 ksi = 6.895 MPa.
Quick Reference Table
| Inches of Mercury (inHg) | Kilopounds per Square Inch (ksi) |
|---|---|
| 1 inHg | 0.000491154 ksi |
| 2 inHg | 0.000982308 ksi |
| 5 inHg | 0.00245577 ksi |
| 10 inHg | 0.00491154 ksi |
| 25 inHg | 0.0122789 ksi |
| 50 inHg | 0.0245577 ksi |
| 100 inHg | 0.0491154 ksi |