How to Convert Pascals to Bar (Pa to bar)
Pressure conversions are used for tyre pressure (psi or bar), blood pressure readings in mmHg and weather maps in millibars. This guide shows how to convert pascals into bar by hand, with examples and a quick-reference table.
The conversion
To convert pascals to bar, multiply the value by 1.000000e-05. To go the other way, divide by the same number (or multiply by 100,000). Because the factor is tiny, scientific notation keeps the numbers manageable.
Bar = pascals × 1.000000e-05
Worked examples
- 3 Pa = 3.000000e-5 bar
- 12.5 Pa = 0.000125 bar
- 75 Pa = 0.00075 bar
Pascals to Bar table
| Pascals | Bar |
|---|---|
| 1 Pa | 1.000000e-5 bar |
| 2 Pa | 2.000000e-5 bar |
| 5 Pa | 5.000000e-5 bar |
| 10 Pa | 0.0001 bar |
| 20 Pa | 0.0002 bar |
| 25 Pa | 0.00025 bar |
| 50 Pa | 0.0005 bar |
| 100 Pa | 0.001 bar |
| 250 Pa | 0.0025 bar |
| 500 Pa | 0.005 bar |
| 1,000 Pa | 0.01 bar |
Common questions
Is Pa to bar exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the Bar to Pascals converter.
Mistakes to avoid
Dropping the units
A bare number without a unit is easy to misread later. Always write the unit with the result.
Forgetting squared and cubed units
Area and volume factors are the length factor squared or cubed, so 1 m² is about 10.76 sq ft, not 3.28.
Rounding the factor too early
Using 3 instead of 3.28 for feet per metre introduces an error of almost 9% before you have started.
Background
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
For any value, use the Pascals to Bar Converter or browse all pressure converters.
Run your own numbers: Pascals to Bar Converter