Introduction
In the world of pressure measurement, the units of psig and kg/cm2 are frequently encountered. Understanding the conversion between these units is crucial for various industrial applications, scientific experiments, and engineering calculations. This article delves into the intricacies of converting 100 psig to kg/cm2, exploring its significance and providing practical insights.

Definition of psig and kg/cm2
psig (Pounds per Square Inch Gauge)
psig is a unit of pressure measured relative to the atmospheric pressure. It represents the pressure above the surrounding atmospheric pressure. For instance, a pressure of 100 psig indicates that the pressure is 100 pounds per square inch greater than the current atmospheric pressure.
kg/cm2 (Kilograms per Square Centimeter)
kg/cm2 is a unit of pressure measured in the metric system. It represents the force exerted by a mass of one kilogram acting on an area of one square centimeter. For example, a pressure of 1 kg/cm2 indicates that a force of one kilogram is acting on an area of one square centimeter.
Conversion Formula
1 psig = 0.070307 kg/cm2
To convert psig to kg/cm2, multiply the psig value by 0.070307.
Example Conversion
Convert 100 psig to kg/cm2:
100 psig x 0.070307 kg/cm2 = 7.0307 kg/cm2
Therefore, 100 psig is equal to 7.0307 kg/cm2.
Significance of Conversion
The conversion between psig and kg/cm2 is essential in various fields, including:
- Pressure gauge calibration
- Hydraulic and pneumatic system design
- Fluid flow calculations
- Engineering analysis
- Scientific research
Understanding the conversion allows engineers, scientists, and technicians to accurately measure, compare, and analyze pressure values expressed in different units.
Tables for Conversion
Table 1: Conversion Factors
psig | kg/cm2 |
---|---|
0 | 0 |
5 | 0.35154 |
10 | 0.70307 |
15 | 1.05461 |
20 | 1.40614 |
Table 2: Common Pressure Values
psig | kg/cm2 | Description |
---|---|---|
0 | 0 | Atmospheric pressure |
15 | 1.05461 | Automobile tire pressure |
100 | 7.0307 | Hydraulic system pressure |
200 | 14.0614 | High-pressure gas pipeline |
500 | 35.1535 | Oil well drilling pressure |
Table 3: Conversion Chart
psig | kg/cm2 |
---|---|
10 | 0.70307 |
15 | 1.05461 |
20 | 1.40614 |
25 | 1.75768 |
30 | 2.10921 |
35 | 2.46075 |
40 | 2.81228 |
45 | 3.16382 |
50 | 3.51535 |
… | … |
Table 4: Metric Conversions
Unit | Conversion |
---|---|
1 bar | 1.01972 kg/cm2 |
1 atmosphere | 1.03323 kg/cm2 |
1 MPa | 10.1972 kg/cm2 |
1 psi | 0.070307 kg/cm2 |
Common Mistakes to Avoid
1. Confusing Gauge and Absolute Pressures: Gauge pressure is measured relative to atmospheric pressure, while absolute pressure is measured relative to a perfect vacuum. It is crucial to verify which type of pressure is being measured before converting.
2. Using Incorrect Conversion Factor: Remember to use the correct conversion factor of 0.070307 to convert psig to kg/cm2 and vice versa.
3. Mixing Units: Avoid mixing different units of pressure in calculations. Ensure that all pressure values are expressed in the same unit before conversion.
Applications
The conversion between psig and kg/cm2 has numerous applications in various industries. Here are a few examples:
-
Pressure Vessel Design: Engineers need to convert psig to kg/cm2 to ensure that pressure vessels can withstand the desired operating pressure in different regions.
-
Fluid Power Systems: In hydraulic and pneumatic systems, pressure values are often expressed in psig. Converting to kg/cm2 allows for compatibility with metric system components.
-
Instrumentation Calibration: Pressure gauges and other instruments may have scales marked in psig or kg/cm2. Understanding the conversion enables accurate calibration and readings.
Conclusion
Converting 100 psig to kg/cm2 requires a simple multiplication by the conversion factor of 0.070307. This conversion plays a vital role in various fields, ranging from engineering to science. By understanding the formula and its significance, you can accurately convert pressure values and ensure optimal performance in your applications.