Bar to pascals (bar to Pa) converter

What is a bar to pascals converter?

A bar to pascals converter is an online tool that translates a pressure value expressed in bars into its equivalent in pascals (Pa), and back again. The bar is a practical, human-friendly unit that is close to ordinary atmospheric pressure, while the pascal is the SI base unit for pressure. Because engineering data sheets, weather reports, and laboratory results often mix the two, a quick converter saves you from second-guessing the decimal point on a number that can run into the millions.

The relationship between the two is fixed and exact: 1 bar equals 100,000 pascals. That clean factor of one hundred thousand makes the conversion easy in principle but error-prone by hand, since it is easy to drop or add a zero.

How it works

The pascal is defined as one newton of force spread over one square meter (1 Pa = 1 N/m²). The bar was introduced as a convenient multiple of the pascal, set at exactly 100,000 Pa. Related units you will meet on the same dial follow the same chain:

• 1 bar = 100,000 Pa (the value this page focuses on)
• 1 bar = 100 kilopascals (kPa)
• 1 bar ≈ 0.986923 standard atmospheres (atm)
• 1 bar ≈ 14.5038 pounds per square inch (psi)

To go from bars to pascals you multiply by 100,000. To go the other way, from pascals back to bars, you divide by 100,000 (or multiply by 0.00001). The converter on this page lets you type into either field and updates the other instantly, so it works in both directions.

Formula

To convert bars to pascals:

$\text{Pa} = \text{bar} \times 100000$

To convert pascals back to bars:

$\text{bar} = \frac{\text{Pa}}{100000}$

Bar to pascals conversion table

The table below lists common bar values with their pascal equivalents. The pattern is consistent: shift the decimal point five places to the right.

Examples

Example 1: One bar to pascals

A single bar is the headline conversion. Multiply by the factor:

$1 \text{ bar} \times 100000 = 100000 \text{ Pa}$

So 1 bar is exactly 100,000 pascals, or 100 kPa.

Example 2: Pascals back to bar

Suppose a sensor reports a reading of 100,000 Pa and you want it in bars. Divide by the factor:

$\frac{100000 \text{ Pa}}{100000} = 1 \text{ bar}$

The reading is exactly 1 bar.

Example 3: A tire-style pressure of 2.5 bar

Many car tires are inflated to roughly 2.5 bar. In pascals that becomes:

$2.5 \text{ bar} \times 100000 = 250000 \text{ Pa}$

That is 250,000 Pa, or 250 kPa.

Example 4: A high-pressure value of 100 bar

Industrial systems such as hydraulic equipment can operate near 100 bar. Converting:

$100 \text{ bar} \times 100000 = 10000000 \text{ Pa}$

The result is 10,000,000 Pa, or 10 megapascals (MPa).

Notes

• The bar-to-pascal factor of 100,000 is exact by definition, not an approximation, so results are precise.
• Pascals grow large quickly. A pressure of 100 bar is already 10 million pascals, which is why kilopascals (kPa) and megapascals (MPa) are often used to keep the numbers readable.
• The bar is not part of the official SI, but it is accepted for use alongside SI units and is widely used in meteorology (where the millibar, equal to 100 Pa, is common) and engineering.
• Do not confuse absolute pressure with gauge pressure. The conversion factor is identical, but the reference point differs: gauge pressure is measured relative to the surrounding atmosphere.

Frequently asked questions

How many pascals are in 1 bar?

There are exactly 100,000 pascals in 1 bar. Equivalently, 1 bar equals 100 kilopascals (kPa).

How do I convert pascals to bars?

Divide the number of pascals by 100,000. For example, 250,000 Pa ÷ 100,000 = 2.5 bar.

Is the bar to pascal conversion exact?

Yes. The bar is defined as exactly 100,000 pascals, so the conversion involves no rounding. Any rounding you see comes only from how the final number is displayed.

What is the difference between a bar and a pascal?

The pascal is the SI unit of pressure, equal to one newton per square meter, and it is a very small unit. The bar is a much larger, more practical unit equal to 100,000 pascals, close to everyday atmospheric pressure.

How many bars is 1,000,000 pascals?

One million pascals equals 10 bar (1,000,000 ÷ 100,000 = 10). That is also 1 megapascal (MPa).

How does a bar compare to an atmosphere?

They are close but not identical: 1 bar is about 0.986923 standard atmospheres, and 1 atmosphere is about 1.01325 bar. For a precise pressure-unit comparison, use our pressure converter.