Convert Kilogram-force per Square Centimeters to Inches of Mercury
Instantly convert Kilogram-force per Square Centimeters (kgf/cm²) to Inches of Mercury (inHg) with our free online calculator.
Formula: kgf/cm² to inHg — multiply by 28.959
Reference Table
| Kilogram-force per Square Centimeters (kgf/cm²) | Inches of Mercury (inHg) |
|---|---|
| 1 | 28.959 |
| 5 | 144.795 |
| 10 | 289.59 |
| 25 | 723.975 |
| 50 | 1447.95 |
| 100 | 2895.9 |
How to Convert Kilogram-force per Square Centimeters to Inches of Mercury
Formula
To convert Kilogram-force per Square Centimeters (kgf/cm²) to Inches of Mercury (inHg): multiply by 28.959
Step-by-Step
- Start with your value in Kilogram-force per Square Centimeters (kgf/cm²).
- Multiply by 28.959 to perform the conversion.
- The result is your value expressed in Inches of Mercury (inHg).
Conversion Factor
1 kgf/cm² = 28.959 inHg
Reverse Factor
1 inHg = 0.0345316 kgf/cm²
Worked Example
Convert 25 Kilogram-force per Square Centimeters to Inches of Mercury: 25 kgf/cm² = 723.975 inHg
About Kilogram-force per Square Centimeter (kgf/cm²)
A legacy metric unit of pressure equal to one kilogram-force applied over one square centimeter, formally defined as exactly 98,066.5 Pa (using the standard acceleration of gravity g₀ = 9.80665 m/s² per CIPM Resolution 2, 1901). This is the "technical atmosphere" (symbol at) and is roughly equivalent to one standard atmosphere or one bar — but not exactly. Although superseded by SI-proper units (pascal, megapascal) under ISO 80000-4, kgf/cm² persists on industrial gauges in Japan, Korea, and parts of Eastern Europe; on older industrial machinery; on legacy pressure-vessel drawings (where the implicit assumption of g = 9.80665 m/s² matters); on tire-pressure data tables in some markets; and in older engineering textbooks. Engineers updating legacy documentation should be careful: the technical atmosphere (98,066.5 Pa) is NOT the same as the standard atmosphere (101,325 Pa). Converting kgf/cm² to MPa is divide by 10.197 (a clean approximation: ÷10.2); to psi is multiply by 14.223.
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.
Quick Facts
- 1 Kilogram-force per Square Centimeter equals 28.959 Inches of Mercury
- 1 Inch of Mercury equals 0.0345316 Kilogram-force per Square Centimeters
- Kilogram-force per Square Centimeter is a unit of pressure
- Inch of Mercury is a unit of pressure
- This conversion is commonly used in tire inflation, weather reporting, scuba diving, and engineering
- The Kilogram-force per Square Centimeter belongs to the metric system
- The Inch of Mercury belongs to the imperial system
Common Kilogram-force per Square Centimeter to Inch of Mercury Conversions
| Kilogram-force per Square Centimeters (kgf/cm²) | Inches of Mercury (inHg) |
|---|---|
| 0.1 | 2.8959 |
| 0.5 | 14.4795 |
| 1 | 28.959 |
| 2 | 57.918 |
| 5 | 144.795 |
| 10 | 289.59 |
| 14.696 | 425.582 |
| 15 | 434.385 |
| 20 | 579.18 |
| 25 | 723.975 |
| 50 | 1447.95 |
| 100 | 2895.9 |
| 150 | 4343.85 |
| 200 | 5791.8 |
| 500 | 14479.5 |
| 1000 | 28959 |
Understanding Kilogram-force per Square Centimeters
The Kilogram-force per Square Centimeter (symbol: kgf/cm²) is a unit of pressure. A legacy metric unit of pressure equal to one kilogram-force applied over one square centimeter, formally defined as exactly 98,066.5 Pa (using the standard acceleration of gravity g₀ = 9.80665 m/s² per CIPM Resolution 2, 1901). This is the "technical atmosphere" (symbol at) and is roughly equivalent to one standard atmosphere or one bar — but not exactly. Although superseded by SI-proper units (pascal, megapascal) under ISO 80000-4, kgf/cm² persists on industrial gauges in Japan, Korea, and parts of Eastern Europe; on older industrial machinery; on legacy pressure-vessel drawings (where the implicit assumption of g = 9.80665 m/s² matters); on tire-pressure data tables in some markets; and in older engineering textbooks. Engineers updating legacy documentation should be careful: the technical atmosphere (98,066.5 Pa) is NOT the same as the standard atmosphere (101,325 Pa). Converting kgf/cm² to MPa is divide by 10.197 (a clean approximation: ÷10.2); to psi is multiply by 14.223.
It belongs to the metric measurement system.
Kilogram-force per Square Centimeters are commonly used in tire inflation, weather reporting, scuba diving, and engineering.
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.
Why Convert Kilogram-force per Square Centimeters to Inches of Mercury?
Engineers, mechanics, and scientists frequently need to convert pressure between Kilogram-force per Square Centimeters and Inches of Mercury 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 Kilogram-force per Square Centimeters to Inches of Mercury?
A legacy metric unit of pressure equal to one kilogram-force applied over one square centimeter, formally defined as exactly 98,066. To convert Kilogram-force per Square Centimeters to Inches of Mercury, multiply by 28.959. For example, 25 kgf/cm² equals 723.975 inHg.
How many Inches of Mercury are in 1 Kilogram-force per Square Centimeter?
There are 28.959 Inches of Mercury in 1 Kilogram-force per Square Centimeter.
How many Kilogram-force per Square Centimeters are in 1 Inch of Mercury?
There are 0.0345316 Kilogram-force per Square Centimeters in 1 Inch of Mercury.
What is the formula for Kilogram-force per Square Centimeter to Inch of Mercury conversion?
The formula is: multiply by 28.959. This means 1 kgf/cm² = 28.959 inHg.
Is a Kilogram-force per Square Centimeter bigger than a Inch of Mercury?
No. One Kilogram-force per Square Centimeter is smaller than one Inch of Mercury because 1 kgf/cm² equals 28.959 inHg, which is greater than 1.
When do you need to convert between Kilogram-force per Square Centimeters and Inches of Mercury?
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. Kilogram-force per Square Centimeter and Inch of Mercury 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.