Convert Pressure
Enter the numerical value you want to convert between pressure units.
Table of Contents
- Importance of Pressure and Its Conversion
- Formulas to Convert Pressure Units
- Practical Examples of Pressure Unit Conversion
- Frequently Asked Questions
Importance of Pressure and Its Conversion
Pressure is a fundamental concept in physics and engineering, and it is a crucial parameter in many industrial and scientific applications.
Understanding pressure conversions is important because it allows us to accurately measure and compare pressures in different units and convert them to a unit that is more convenient for a specific application.
Formulas to Convert Pressure Units
To convert between different pressure units, specific conversion factors are used. Below are the most common formulas to convert values between pascals (Pa), bars (bar), atmospheres (atm), millimeters of mercury (mmHg), and pounds per square inch (psi).
- From pascals (Pa) to bars (bar):
Formula: bar = Pa ÷ 100,000 - From pascals (Pa) to atmospheres (atm):
Formula: atm = Pa ÷ 101,325 - From pascals (Pa) to millimeters of mercury (mmHg):
Formula: mmHg = Pa ÷ 133.322 - From pascals (Pa) to pounds per square inch (psi):
Formula: psi = Pa ÷ 6,894.76
For reverse conversions, simply multiply the value by the same factor:
- From atmospheres to pascals:
Formula: Pa = atm × 101,325 - From bars to pascals:
Formula: Pa = bar × 100,000 - From mmHg to pascals:
Formula: Pa = mmHg × 133.322 - From psi to pascals:
Formula: Pa = psi × 6,894.76
Practical Examples of Pressure Unit Conversion
- Example 1: How to convert 2 psi to kilopascals (kPa)?
Calculation: 2 psi × 6.89475729 = 13.78951458 kPa - Example 2: How to convert 5 bars (bar) to pascals (Pa)?
Calculation: 5 bar × 100,000 = 500,000 Pa - Example 3: How to convert 15 atmospheres (atm) to psi?
Calculation: 15 atm × 14.696 = 220.44 psi
Frequently Asked Questions
What is pressure and how is it measured?
Pressure is the force exerted on a surface per unit area. It is measured in units such as pascals (Pa), atmospheres (atm), bars (bar), or psi (pounds per square inch), depending on the measurement system used.
Why are there different pressure units?
Different pressure units exist because of the various measurement systems adopted by regions or industries. For example, pascal (Pa) is used in physics, while psi or bar is commonly used in pneumatics or automotive applications.
When is it necessary to convert pressure units?
Converting pressure units is necessary when working with data from different sources, countries, or industries that use different measurement systems, or when uniformity is needed for technical and scientific calculations.
What is the pressure unit in the International System?
The pressure unit in the International System of Units (SI) is the pascal (Pa), which is equivalent to one newton per square meter (N/m²).
What pressure unit is used for measuring tire pressure?
Tire pressure is commonly measured in psi (pounds per square inch) or bar, depending on the country or vehicle manufacturer.
What instrument is used to measure pressure?
The most common instrument for measuring pressure is the manometer. There are several types, such as U-tube, spring-based, and electronic manometers, each with specific applications.
Does atmospheric pressure change with altitude?
Yes, atmospheric pressure decreases as altitude increases, because there is less air exerting force on a surface at higher elevations.
What is the difference between absolute and gauge pressure?
Absolute pressure is measured from a total vacuum, while gauge pressure is measured relative to atmospheric pressure. For example, 1 atm of gauge pressure equals about 2 atm of absolute pressure at sea level.