Authoritative definitions of the International System of Units and SI prefixes.
Dedicated unit pair
Bar to Pounds per square inch
Convert bar to psi instantly, then review the formula, assumptions, and rounding guidance.
Pressure & stressInstant result
Decimals
Formula result = input × 100000 ÷ 6894.757293. 1 bar = 14.5038 psi
Common examples
One value, several units
Pascals100,000 Pa
Kilopascals100 kPa
Megapascals0.1 MPa
Atmospheres0.9869 atm
Pounds per square inch14.5038 psi
Millimetres of mercury750.0616 mmHg
Conversion table
| bar | psi |
|---|---|
| 1 bar | 14.5038 psi |
| 2 bar | 29.0075 psi |
| 5 bar | 72.5189 psi |
| 10 bar | 145.0377 psi |
| 25 bar | 362.5943 psi |
| 50 bar | 725.1887 psi |
| 100 bar | 1,450.3774 psi |
Conversion chart
1 bar14.5038 psi
5 bar72.5189 psi
10 bar145.0377 psi
25 bar362.5943 psi
50 bar725.1887 psi
Worked example
Standard atmosphere is 101,325 pascals.
Unit definition
Bar (bar) One bar equals 100,000 pascal.
Unit history
Bar is represented here using its modern SI definition or an internationally accepted relationship to an SI base unit.
Step by step
1. Parse the value, including fractions.
2. Convert bar to pascal.
3. Convert the base value to psi and apply your display precision.
Understand the result before using it
Bar to Pounds per square inch converts a value measured in Bar (bar) into the equivalent value in Pounds per square inch (psi). The numerical value changes because the size and definition of the selected unit changes; the underlying quantity does not.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 100000 ÷ 6894.757293
Assumptions
- Bar and Pounds per square inch represent the same pressure & stress quantity.
- The input is expressed in bar; the output is expressed in psi.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 bar = 14.5037737734 psi. For another value, apply the same relationship and round only to the precision your source measurement supports.
When to use it
Good uses
- Read a bar measurement in a document that expects psi.
- Compare a bar value with a value reported in pounds per square inch.
- Check the bar-to-psi arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Do not confuse bar with another unit that has a similar name or symbol.
- Round the output to a precision justified by the original measurement.
- Verify safety-critical, regulated, laboratory, and contractual conversions against the controlling standard.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
How do I convert Bar to Pounds per square inch?
result = input × 100000 ÷ 6894.757293 Using the displayed relationship, 1 bar equals 14.5037737734 psi.
How many Pounds per square inch are in one Bar?
One Bar is 14.5037737734 Pounds per square inch. The displayed digits may be rounded.
Can I reverse the bar to psi conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts psi back to bar.
Is the Bar to Pounds per square inch result exact?
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.