Bar To PSI Calculator: Convert Bars To PSI (+ Pressure Chart) (2024)

Bar to PSI is one of the most common pressure unit conversions. Here, we will help you convert any bars to PSI (Pounds per Square Inch). We will explain exactly how to convert pressure in bars to pressure in PSI with these 2 useful tools:

1. Bar To PSI Calculator. Here, you just insert the number of bars, and the online calculator will immediately convert them to PSI. Example: You insert ‘2.8 bars’, and the calculator tells you this is equal to 40.61 PSI right away.
2. Bar To PSI Conversion Chart. We converted 0.01-100 bars into PSI and summarized all the bar-to-psi equivalents in a neat conversion chart.

Let’s start with the calculator (we’ll show you the formula below the calculator, followed by the conversion chart):

Let’s use this online calculator to solve one example to illustrate how the calculator works:

How many PSI is 0.8 bar? We simply input ‘0.8’ in the bar input field, hit ‘Calculate’, and we get this result (screenshot):

We see that 0.8 bar is equal to 11.60 PSI. You can also use a similar PSI to bar calculator here, if you need this conversion in reverse.

Let’s have a look at the math behind this conversion:

Bar To PSI Formula

Namely, both bars and PSI are units of pressure:

• Bar is defined as 100,000 Pa (Pascals, another unit of pressure). This is a pressure produced by a force of 100,000 N (Newtons) being exerted on an area of 1 m² (square meter). Our atmospheric pressure at sea level, for example, is about 1.013 bars.
• PSI or pounds per square inch is just that; a pressure produced by a force of 1 pound being exerted on a surface of 1 square inch.

Now, to convert between these two pressure units, we only need to know this 1 conversion relationship:

1 Bar = 14.5037738 PSI

Basically, 1 bar is equal to about 14.5 PSI. Using this relationship, we can write the following bar to PSI formula:

PSI = Bar × 14.5037738

Namely, if we want to convert bars to PSI, we have to multiply the number of bars by a factor of 14.5037738.

Quick Example: How many PSI is 0.3 bars? Simple. We just input 0.3 bars in the equation above like this (with the result):

PSI (0.3 Bar) = 0.3 Bar × 14.5037738 = 4.35 PSI

We can see that 0.3 bar is equal to 4.35 PSI (accurate to two decimal places). You can check this result with the calculator above.

This is just one example. We convert pressures ranging from 0.01 and up to 100 bars into PSI, and summarized the results in this conversion chart you can freely use:

Bar To PSI Conversion Chart

From now on, you can just check this chart, and see how many PSI you get for the certain amount of bars. In practice, the most commonly used conversions are below 1 bar. Here are the most important ones from the chart:

• 0.1 bar is equal to 1.45 PSI.
• 0.2 bar is equal to 2.90 PSI.
• 0.3 bar is equal to 4.35 PSI.
• 0.4 bar is equal to 5.80 PSI.
• 0.5 bar is equal to 7.25 PSI.
• 0.6 bar is equal to 8.70 PSI.
• 0.7 bar is equal to 10.15 PSI.
• 0.8 bar is equal to 11.60 PSI.
• 0.9 bar is equal to 13.05 PSI.

The atmospheric pressure at sea level (about 1.013 bar) is equal to 14.69 PSI.

Using the online calculator and this chart, you can now convert any bar to PSI yourself. If you need any help from us, you can always use the comment section below to specify how we can help you out, and we will lend our hand.