100% free · Runs 100% in your browser · Pa, kPa, bar, psi, atm & more · No signup needed
Type in any field and the rest update instantly. 1 atm = 101,325 Pa = 1.01325 bar = 14.696 psi; 1 bar = 100,000 Pa; 1 psi ≈ 6,894.76 Pa.
Try an example: 2 bar = 200,000 Pa = 29.01 psi
| What | psi | bar | Pa |
|---|---|---|---|
| Sea-level atmosphere | 14.696 | 1.01325 | 101,325 |
| Car tyre (typical) | ~32 | ~2.21 | ~220,632 |
| Bicycle tyre | ~80 | ~5.52 | ~551,581 |
| 100 psi | 100 | 6.89 | 689,476 |
How many bar is 100 psi? How many pascal are in 2 bar? With the free Pressure Converter from FistHost, you get the answer instantly. Type a value in any unit — pascal, kilopascal, bar, psi, or atmosphere — and all the other units update at once. There is nothing to install, no account to create, and no waiting — everything runs in your browser, so your numbers never leave your device.
Pressure comes up in more places than most people realise: car and bicycle tyres, scuba diving, weather reports, boilers, air compressors, and science lessons all use it, and each of them seems to prefer a different unit. A tyre pump shows psi, a handbook quotes bar, a weather map uses hectopascals, and a physics textbook works in pascal. This converter removes the friction of switching between them, so you can check a tyre, read a gauge, or finish a homework question without reaching for a formula.
The converter works with five common pressure units. The pascal (Pa) is the standard scientific unit of pressure, defined as one newton per square metre. It is the unit of the International System, which makes it the natural choice for science and engineering calculations. The kilopascal (kPa) is simply 1,000 pascal, and it is common in weather reports, building work, and engineering, where plain pascal would give unwieldy five-figure numbers.
The bar is a metric unit close to normal atmospheric pressure, and it is widely used for tyres, industrial gauges, and espresso machines. Pounds per square inch (psi) is the unit most drivers in the United States and the United Kingdom meet at the petrol station, and it is also standard in American engineering. The atmosphere (atm) is the average pressure of the air at sea level, and it is a natural reference point for science, diving, and weather.
These are the exact conversion facts the tool uses. One atmosphere equals 101,325 pascal, which is also 1.01325 bar and 14.696 psi. One bar equals 100,000 pascal. One psi is approximately 6,894.76 pascal. Those numbers are all you need to move between any of the units on the page, and the converter applies them for you the moment you type.
Using the tool could not be simpler. Type a number into any one of the unit fields — pascal, kilopascal, bar, psi, or atmosphere — and every other field updates instantly to show the same pressure in its own unit. Change the number, and the rest follow. Clear a field, and you can start again with a different unit.
There is no convert button to press and no form to submit. The instant update is the point: when you are standing at a tyre pump or reading a gauge, you want the answer now, not after three clicks. The common-values table on the page gives you familiar reference points as well, so you can sanity-check a result against a pressure you already know.
Try these conversions in the tool and compare the results with the table below. Each one uses the verified conversion facts above.
| From | To | Result |
|---|---|---|
| 100 psi | bar | Approximately 6.89 bar |
| 2 bar | pascal | 200,000 Pa |
| 2 bar | psi | 29.01 psi |
| 1 atm | pascal | 101,325 Pa |
| 1 atm | bar | 1.01325 bar |
| 1 atm | psi | 14.696 psi |
| 1 bar | pascal | 100,000 Pa |
| 1 psi | pascal | Approximately 6,894.76 Pa |
The 100 psi example is a useful one to remember: 100 psi is approximately 6.89 bar. That sits well above everyday tyre pressures, which makes it a good check that the converter is behaving sensibly. The 2 bar example is equally handy: 2 bar equals 200,000 pascal and 29.01 psi, so a gauge reading of 2 bar and a gauge reading of 29 psi are describing the same pressure in different units. And the 1 atm row is the anchor for the whole table: one atmosphere is 101,325 Pa, 1.01325 bar, and 14.696 psi, all at once.
A few familiar pressures help you judge whether a conversion looks right. A typical car tyre is around 32 psi, which is about 2.21 bar — a useful reference when a pump shows one unit and your handbook shows the other. Sea-level atmospheric pressure is 1 atm, which is 101,325 Pa, 1.01325 bar, and 14.696 psi. If your conversion of a pressure near sea level lands far from those figures, check which unit you typed into.
Weather reports often quote pressure in hectopascals, which are the same size as millibars and equal to 100 pascal, so a reading of 1,013 hectopascals is normal sea-level pressure in another costume. Bicycle tyres run much higher than car tyres, scuba tanks far higher still, and none of those numbers mean much until they are expressed in the unit your gauge uses — which is exactly what this converter does. The habit to build is simple: convert first, then compare, never the other way around.
Each unit has a home territory, and knowing it saves confusion. Psi rules the road in America and Britain: tyre pumps, air compressors, and pressure washers quote psi. Bar rules the road in Europe, and it also appears on espresso machines, where 9 bar is the classic brewing pressure, and on diving gauges. Pascal and kilopascal rule the classroom and the laboratory, because they fit the metric system cleanly. Atmospheres rule textbooks and diving tables, because 1 atm is a memorable baseline.
Weather is the odd one out: forecasters use hectopascals or millibars, which are not on this converter as separate fields, but the conversion is trivial — one hectopascal is 100 pascal, so multiply the hectopascal reading by 100 to get pascal, then let the tool do the rest. Once you know the home of each unit, a strange number becomes a familiar one in a single keystroke.
The values shown on the page are rounded for display, so that results stay readable instead of trailing off into long strings of decimals. That rounding is only on the surface: the tool keeps the full-precision value and uses it for the next conversion, not the rounded display. In practice, that means converting from psi to bar and then back to psi returns the number you started with, instead of drifting a little further away with each step. The tool says this on the page, because a converter that quietly loses precision would be worse than no converter at all.
For most everyday uses — tyres, gauges, homework, and general curiosity — the rounded display is more than accurate enough. For careful scientific or engineering work, always check the tolerance your task needs and use the full-precision value the tool carries behind the display. And remember that a gauge itself has an error margin, often a psi or two, so chasing the fourth decimal place of a conversion is rarely the part that matters.
The most common mistake is mixing up bar and psi, because both are everyday tyre units and their numbers look similar — 32 psi and 2.2 bar describe the same tyre, but 32 bar would be a disaster. The second mistake is forgetting that atmospheric pressure is the baseline: a gauge that reads zero is usually reading zero above atmospheric pressure, not zero pressure altogether. The third is typing into the wrong field and reading the answer from the wrong row, which is why the converter labels every field clearly and updates them all together.
A final mistake is trusting a single conversion when the stakes are high. If a tyre, a tank, or a boiler depends on the number, convert it twice — once in this tool, and once against a known reference like the 1 atm or 2 bar examples above. A thirty-second check is cheap insurance against a misread gauge.
Pressure is only one of many units you may need to convert. The Unit Converter covers many categories in one place when you need to switch between different kinds of measurement. The Temperature Converter moves between Celsius, Fahrenheit, and Kelvin, and the Speed Converter handles kilometres per hour, miles per hour, metres per second, and knots. Together with this pressure converter, they cover most of the unit switching you meet in daily life, travel, and study.
How many psi is 1 bar? One bar is 14.5038 psi, so 2 bar is 29.01 psi. The converter works this out from the exact fact that 1 psi is approximately 6,894.76 Pa.
How many pascal are in 1 atm? One atmosphere equals 101,325 pascal. It also equals 1.01325 bar and 14.696 psi.
What is 100 psi in bar? 100 psi is approximately 6.89 bar. Try it in the converter and watch all the other units update at the same time.
What is normal tyre pressure? A typical car tyre is around 32 psi, which is about 2.21 bar. Always check your own vehicle handbook or door sticker, because the right pressure varies by car, load, and tyre size.
Are the results rounded? The displayed values are rounded to stay readable, but the tool uses the full-precision value for the next conversion, not the rounded display, so repeated conversions do not drift.
Is my data sent anywhere? No. The conversion runs entirely in your browser, so the values you type never leave your device.
Whether you are checking a tyre, reading a gauge, comparing a weather report, or finishing a physics problem, this converter turns one unit into all the others in a single keystroke — accurately, instantly, and without fuss.
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