Psi Converter
A versatile pressure converter for pounds per square inch (PSI) to other common units like bar, atm, and kPa.
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Understanding PSI and Pressure Conversions
PSI, or Pounds per Square Inch, is an imperial unit of pressure. It measures the amount of force applied perpendicular to a surface, distributed over an area of one square inch. While widely used in the United States for applications like tire pressure and fuel storage, most of the world uses SI units like the Pascal. This article explains how to use the PSI converter and provides context on the conversions.
How to Use the PSI Converter
Our PSI converter is a simple tool designed for quick and accurate conversions.
- Enter PSI Value: Input the number of pounds per square inch you want to convert in the designated field.
- Select Target Unit: Choose the unit you want to convert to from the dropdown menu. Options include Kilopascals (kPa), Bar, Atmospheres (atm), and more.
- View the Result: The converted value will be displayed instantly in the results area.
Key Conversion Formulas
The calculator works by using standard conversion factors. Here are some of the most common ones:
1 PSI ≈ 6.895 kPa1 PSI ≈ 0.06895 bar1 PSI ≈ 0.068046 atm1 PSI ≈ 51.715 Torr (or mmHg)
Example Calculation
If you want to convert a standard car tire pressure of 32 PSI to kilopascals:
32 PSI × 6.895 kPa/PSI = 220.64 kPa
This is a common conversion for automotive engineers and manufacturers who work with international standards.
Quick PSI Conversion Chart
| PSI | kPa (approx.) | Bar (approx.) | atm (approx.) |
|---|---|---|---|
| 1 | 6.9 | 0.069 | 0.068 |
| 14.5 | 100 | 1 | 0.987 |
| 30 | 206.8 | 2.07 | 2.04 |
| 50 | 344.7 | 3.45 | 3.40 |
| 100 | 689.5 | 6.90 | 6.80 |
Frequently Asked Questions (FAQ)
- What is PSI used for?
- PSI is commonly used in the US for measuring pressure in car tires, fuel storage tanks, and in various industrial and hydraulic systems.
- What's the difference between PSI, PSIA, and PSIG?
- PSI is the general term.PSIA (Pounds per Square Inch Absolute) is pressure relative to a perfect vacuum.PSIG (Pounds per Square Inch Gauge) is pressure relative to the surrounding atmospheric pressure. A tire pressure gauge measures in PSIG. To get PSIA, you add the atmospheric pressure (approx. 14.7 PSI at sea level) to the PSIG reading.
- Why convert from PSI?
- Converting from PSI is essential when working with international scientific standards, engineering specifications from other countries, or any context where SI units (like Pascals or bar) are the required standard.
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