Convert Inches of Mercury to Kilopounds per Square Inch
Instantly convert Inches of Mercury (inHg) to Kilopounds per Square Inch (ksi) with our free online calculator.
Formula: inHg to ksi — multiply by 4.9115e-4
Reference Table
| Inches of Mercury (inHg) | Kilopounds per Square Inch (ksi) |
|---|---|
| 1 | 0.000491154 |
| 5 | 0.00245577 |
| 10 | 0.00491154 |
| 25 | 0.0122789 |
| 50 | 0.0245577 |
| 100 | 0.0491154 |
How to Convert Inches of Mercury to Kilopounds per Square Inch
Formula
To convert Inches of Mercury (inHg) to Kilopounds per Square Inch (ksi): multiply by 4.9115e-4
Step-by-Step
- Start with your value in Inches of Mercury (inHg).
- Multiply by 4.9115e-4 to perform the conversion.
- The result is your value expressed in Kilopounds per Square Inch (ksi).
Conversion Factor
1 inHg = 0.000491154 ksi
Reverse Factor
1 ksi = 2036.02 inHg
Worked Example
Convert 25 Inches of Mercury to Kilopounds per Square Inch: 25 inHg = 0.0122789 ksi
About Inch of Mercury (inHg)
A pressure unit defined as the pressure exerted by a 1-inch column of mercury at the standard density of mercury (0 °C) and the standard acceleration of gravity (≈ 3,386.389 Pa per NIST SP 811). Inches of mercury are the primary unit in US aviation for altimeter settings (the QNH datum is reported in inHg in METAR weather observations — "Altimeter 30.12 inHg" means 30.12 inHg corrected to mean sea level), US barometric weather reporting on consumer indoor weather stations and TV weather graphics, HVAC and refrigeration duct/return static pressure (often quoted as fractions of an inHg, e.g., 0.25 inHg = ~62 Pa), and some legacy automotive vacuum gauges measuring intake-manifold vacuum below atmospheric (a healthy engine reads ~18-22 inHg of vacuum at idle). Standard sea-level atmospheric pressure is 29.92 inHg = 1013.25 hPa = 101.325 kPa.
About Kilopound per Square Inch (ksi)
An imperial unit of pressure equal to exactly 1,000 psi (≈ 6.895 MPa). KSI is the standard US unit for reporting material strength: structural-steel yield (A36 = 36 ksi, A992 W-shapes = 50 ksi, A572-Gr50 plate = 50 ksi, A514 quenched-tempered = 100 ksi), bolt-grade tensile strength (SAE Grade 5 = 120 ksi, Grade 8 = 150 ksi, ASTM A325 = 105-120 ksi, A490 = 150 ksi), aluminum aerospace alloys (7075-T6 ultimate = ~83 ksi), and the S-N fatigue curves in MMPDS / ASME Section VIII Division 3. US structural codes (AISC Steel Construction Manual, AASHTO LRFD Bridge Design), aerospace stress reports, and oil-and-gas casing specifications (API 5CT) all express allowables and yield in ksi. When cross-referencing US alloys against international material databases (typically MPa), the conversion ksi × 6.895 → MPa is essentially universal.
Quick Facts
- 1 Inch of Mercury equals 0.000491154 Kilopounds per Square Inch
- 1 Kilopound per Square Inch equals 2036.02 Inches of Mercury
- Inch of Mercury is a unit of pressure
- Kilopound per Square Inch is a unit of pressure
- This conversion is commonly used in tire inflation, weather reporting, scuba diving, and engineering
- The Inch of Mercury belongs to the imperial system
Common Inch of Mercury to Kilopound per Square Inch Conversions
| Inches of Mercury (inHg) | Kilopounds per Square Inch (ksi) |
|---|---|
| 0.1 | 0.0000491154 |
| 0.5 | 0.000245577 |
| 1 | 0.000491154 |
| 2 | 0.000982308 |
| 5 | 0.00245577 |
| 10 | 0.00491154 |
| 14.696 | 0.007218 |
| 15 | 0.00736731 |
| 20 | 0.00982308 |
| 25 | 0.0122789 |
| 50 | 0.0245577 |
| 100 | 0.0491154 |
| 150 | 0.0736731 |
| 200 | 0.0982308 |
| 500 | 0.245577 |
| 1000 | 0.491154 |
Understanding Inches of Mercury
The Inch of Mercury (symbol: inHg) is a unit of pressure. A pressure unit defined as the pressure exerted by a 1-inch column of mercury at the standard density of mercury (0 °C) and the standard acceleration of gravity (≈ 3,386.389 Pa per NIST SP 811). Inches of mercury are the primary unit in US aviation for altimeter settings (the QNH datum is reported in inHg in METAR weather observations — "Altimeter 30.12 inHg" means 30.12 inHg corrected to mean sea level), US barometric weather reporting on consumer indoor weather stations and TV weather graphics, HVAC and refrigeration duct/return static pressure (often quoted as fractions of an inHg, e.g., 0.25 inHg = ~62 Pa), and some legacy automotive vacuum gauges measuring intake-manifold vacuum below atmospheric (a healthy engine reads ~18-22 inHg of vacuum at idle). Standard sea-level atmospheric pressure is 29.92 inHg = 1013.25 hPa = 101.325 kPa.
It belongs to the imperial measurement system.
Inches of Mercury are commonly used in tire inflation, weather reporting, scuba diving, and engineering.
Understanding Kilopounds per Square Inch
The Kilopound per Square Inch (symbol: ksi) is a unit of pressure. An imperial unit of pressure equal to exactly 1,000 psi (≈ 6.895 MPa). KSI is the standard US unit for reporting material strength: structural-steel yield (A36 = 36 ksi, A992 W-shapes = 50 ksi, A572-Gr50 plate = 50 ksi, A514 quenched-tempered = 100 ksi), bolt-grade tensile strength (SAE Grade 5 = 120 ksi, Grade 8 = 150 ksi, ASTM A325 = 105-120 ksi, A490 = 150 ksi), aluminum aerospace alloys (7075-T6 ultimate = ~83 ksi), and the S-N fatigue curves in MMPDS / ASME Section VIII Division 3. US structural codes (AISC Steel Construction Manual, AASHTO LRFD Bridge Design), aerospace stress reports, and oil-and-gas casing specifications (API 5CT) all express allowables and yield in ksi. When cross-referencing US alloys against international material databases (typically MPa), the conversion ksi × 6.895 → MPa is essentially universal.
It belongs to the imperial measurement system.
Kilopounds per Square Inch are commonly used in tire inflation, weather reporting, scuba diving, and engineering.
Why Convert Inches of Mercury to Kilopounds per Square Inch?
Engineers, mechanics, and scientists frequently need to convert pressure between Inches of Mercury and Kilopounds per Square Inch when working with different measurement standards. Tire pressure, blood pressure readings, weather barometric measurements, and industrial process specifications may all use different pressure units depending on the region or discipline. Reliable conversion prevents equipment misuse and ensures safety.
Frequently Asked Questions
How do I convert Inches of Mercury to Kilopounds per Square Inch?
A pressure unit defined as the pressure exerted by a 1-inch column of mercury at the standard density of mercury (0 °C) and the standard acceleration of gravity (≈ 3,386. To convert Inches of Mercury to Kilopounds per Square Inch, multiply by 4.9115e-4. For example, 25 inHg equals 0.0122789 ksi.
How many Kilopounds per Square Inch are in 1 Inch of Mercury?
There are 0.000491154 Kilopounds per Square Inch in 1 Inch of Mercury.
How many Inches of Mercury are in 1 Kilopound per Square Inch?
There are 2036.02 Inches of Mercury in 1 Kilopound per Square Inch.
What is the formula for Inch of Mercury to Kilopound per Square Inch conversion?
The formula is: multiply by 4.9115e-4. This means 1 inHg = 0.000491154 ksi.
Is a Inch of Mercury bigger than a Kilopound per Square Inch?
Yes. One Inch of Mercury is larger than one Kilopound per Square Inch because 1 inHg equals 0.000491154 ksi, which is less than 1.
When do you need to convert between Inches of Mercury and Kilopounds per Square Inch?
An imperial unit of pressure equal to exactly 1,000 psi (≈ 6. Inch of Mercury and Kilopound per Square Inch are both pressure units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.