kPa to Bar Converter | Convert Kilopascals to Bar

Convert kPa to bar as you type.

Pressure Converter - Convert kPa, PSI, Bar & More Instantly

1 kPa = 0.01 bar

Reference for one unit; displayed values may be rounded.

Enter Kilopascal

kPa

Kilopascal

Use a dot or comma for decimals, without thousands separators.

Result in Bar

bar

Bar

Decimal places

Display rounding does not improve the accuracy of your original measurement. Very large or very small results use scientific notation.

Method and source

Changing units does not change gauge pressure into absolute pressure or set a safe operating pressure.

NIST SP 811

kpa → bar — Worked examples

Choose an example to fill the tool. Results use the displayed formula and are rounded for display.

Kilopascal to Bar Conversion Formula

To convert kilopascals to bar, divide the kPa value by 100. One kilopascal equals 1,000 pascals and one bar is defined as exactly 100,000 pascals, so 1 kPa = 0.01 bar exactly.

1 kPa = 0.01 bar

Kilopascal and Bar Explained

Kilopascal (kPa)

The kilopascal (kPa) is the SI pressure unit equal to 1,000 pascals — a thousand newtons of force spread over one square metre. It is the native unit of industrial sensors, medical device specs, and engineering documentation, with everyday pressures landing in tidy hundreds: sea-level air at 101.325 kPa, passenger tyres at 220 kPa, hydraulic lines in the tens of thousands. It's also the unit you'll see on Australian vehicle tyre placards. Because it chains directly to other SI units, one kPa reading serves calculation and compliance alike.

Where it is used: Kilopascals dominate sensor readouts, SI engineering datasheets, Australian tyre placards, plumbing standards, and medical device documentation.

Origin: The prefix kilo attached to the pascal after the unit became the SI pressure standard in 1971, giving engineers a humane alternative to raw pascals.

Bar (bar)

The bar is a metric pressure unit defined as exactly 100,000 pascals — conveniently close to standard atmospheric pressure (1.01325 bar), which is why it feels intuitive on gauges. Imported machinery nameplates, dive gear and CO2 regulators are all scaled in bar, with familiar anchors like 9 bar espresso and 200 bar dive cylinders. Australian tyre placards read in kPa, so bar mostly shows up through European imports and the dive industry. Though not an SI unit, it is accepted for use alongside SI and remains the working language of European pressure hardware.

Where it is used: Bar is the default gauge unit across Europe and the dive industry — machinery ratings, compressor dials, imported equipment, and carbonation regulators.

Origin: Named after the Greek baros (weight) by Norwegian meteorologist Vilhelm Bjerknes around 1909, the bar was later pinned to exactly 100 kPa to keep meteorology and engineering on one scale.

Kilopascal to Bar Conversion Table

Select a value to use it in the calculator.

Kilopascal (kPa)	Bar (bar)
	0.01 bar
	0.02 bar
	0.05 bar
	0.1 bar
	0.2 bar
	0.5 bar
	0.7 bar
	1 bar
	1.01325 bar
	1.5 bar
	2 bar
	2.2 bar
	2.5 bar
	3 bar
	3.5 bar
	4 bar
	4.5 bar
	6 bar
	9 bar
	10 bar

Bar to Kilopascal Conversion Table

Bar (bar)	Kilopascal (kPa)
0.1 bar	10 kPa
0.2 bar	20 kPa
0.5 bar	50 kPa
0.7 bar	70 kPa
1 bar	100 kPa
1.5 bar	150 kPa
2 bar	200 kPa
2.3 bar	230 kPa
2.5 bar	250 kPa
3 bar	300 kPa
4 bar	400 kPa
5 bar	500 kPa
9 bar	900 kPa
10 bar	1000 kPa

Kilopascal to Bar in Everyday Objects

Common real-world examples that make Kilopascal and Bar easy to picture at a glance.

	Kilopascal (kPa)	Bar (bar)
A ute's tyre placard	230 kPa	2.3 bar
A Melbourne café espresso machine	900 kPa	9 bar
A dive cylinder filled in Cairns	20000 kPa	200 bar
Standard sea-level air	101.325 kPa	1.01325 bar
A hydraulic excavator line on a mine site	35000 kPa	350 bar
A home carbonation peak	400 kPa	4 bar
A track-cycling tyre at the velodrome	800 kPa	8 bar

When You Need Kilopascal to Bar Conversions

Imported Machinery Sign-Off

A test sheet calls for 350 bar on the main hydraulic line while the site's transducer logs 35,000 kPa — enter either figure to confirm the run met spec, whether you're in a Perth workshop or a Pilbara mine.

Home Carbonation Setup

A CO2 regulator dialled to 2.5 bar for cold fridge carbonation reads 250 kPa on the inline gauge; convert once and mark both scales on the keg collar.

Scuba Fill Verification

A dive shop in Cairns or Jervis Bay charges cylinders to 200 bar (20,000 kPa) while your dive computer logs kPa — convert at the counter before logging the dive profile.

Imported Appliance Hookup

An imported espresso machine specifies a 9 bar (900 kPa) pump; verify the installer's kPa gauge matches before pulling your first flat white, since mains fluctuations show up in kPa first.

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How to Use

1

Enter kPa Value

Type the kilopascal reading — typical entries include tyre pressures off the door placard (220-250 kPa), sand-driving pressures after airing down (100-150 kPa), pump discharge (600 kPa), and industrial sensors on site (up to 35,000 kPa)
2

View Bar Result

The bar equivalent appears instantly. For example, 450 kPa converts to 4.5 bar
3

Copy or Swap

Copy the result or click Swap to convert bar back to kilopascals
4

Cross-Check the Spec Sheet

Compare against the nameplate: imported European machinery usually rates in bar (e.g. a 350 bar hydraulic line = 35,000 kPa on the sensor)

Why Use Be Converter?

Instant Conversion

Get precise kPa to bar results in real time as you type — perfect for machine datasheets, workshop cross-checks and pre-dive gear checks

Exact Metric Relation

The conversion is definitionally exact: 1 bar = 100,000 Pa and 1 kPa = 1,000 Pa, so every result is a clean two-decimal shift

Conversion Table

Quick reference with common values like 220 kPa (2.2 bar) — a typical door-placard pressure on a ute — 600 kPa (6 bar), and 20,000 kPa (200 bar) dive fills

Bidirectional

Easily swap between kilopascals and bar with one click for reverse conversions

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Frequently Asked Questions

How many bar is 1 kPa?

1 kPa equals 0.01 bar exactly — the relationship is a clean metric shift because 1 bar is defined as 100,000 pascals and 1 kPa is 1,000 pascals.

What is 220 kPa in bar?

220 kPa ÷ 100 = 2.2 bar — right in the range printed on Australian tyre placards, where cold pressures for passenger cars typically sit between 200 and 250 kPa.

What is the difference between kPa and bar?

Both are metric: the kilopascal is the SI pressure unit (1,000 Pa) used in engineering documentation and medical devices, while bar (100,000 Pa) is the conventional unit on European gauges, dive gear and imported car stickers. They differ only by a factor of 100 — and Aussie drivers meet both daily, with kPa on the door placard and bar on the dive tank.

How do I convert machinery specs from kPa to bar?

Divide kPa by 100. A hydraulic test pressure of 35,000 kPa is 350 bar — the sort of figure on heavy machinery in the Pilbara — a workshop air line at 600 kPa is 6 bar, and a filter warning at 70 kPa is 0.7 bar.

How many kPa are in 1 bar?

Exactly 100 kPa. So a full dive cylinder at 200 bar holds 20,000 kPa — the standard fill at dive shops from Cairns to Jervis Bay — and an espresso machine brewing at 9 bar pumps at 900 kPa.

How many bar is 250 kPa?

250 kPa = 2.5 bar, a common tyre pressure for utes, SUVs and EVs — you'll find it printed on the placard inside the driver's door of many models sold in Australia.

Is 1 bar exactly 100 kPa or an approximation?

It is exact by definition: the bar was set to exactly 100,000 pascals. Only the atmosphere (101,325 Pa = 1.01325 bar) is a measured quantity, not a definition.

Why do weather maps use hPa instead of kPa or bar?

Sea-level pressure is about 1,013 hPa — the same figure you'll see on Bureau of Meteorology synoptic charts, carried over from decades of millibar readings (1 hPa = 1 mbar = 0.1 kPa). When a high parks over the Bight or a low barrels up the NSW coast, the chart reads hPa while engineering specs use kPa and bar.

About Kilopascal to Bar Converter

Our free online kilopascal to bar converter bridges the gap between the SI unit on sensor readouts and datasheets and the bar figures on imported European gauges, machinery nameplates and dive gear. Whether you're signing off a hydraulic test bench that logs in kPa against a 350 bar rating, setting a CO2 regulator on the kegerator, matching the kPa on your ute's tyre placard against a European owner's manual, or checking a fill before a dive on the Great Barrier Reef, this tool moves the decimal with definitionally exact precision. Because 1 bar equals exactly 100,000 pascals and 1 kPa equals 1,000 pascals, every conversion is the clean factor 0.01 — no rounding drift, ever.

Expert Tips for Kilopascal to Bar Conversion

Anchor values worth memorising: tyre placard 220 kPa = 2.2 bar, espresso 900 kPa = 9 bar, household mains water 450 kPa = 4.5 bar, dive fill 20,000 kPa = 200 bar

Sensor drift checks: many industrial transducers log in kPa while the acceptance criterion is written in bar — convert the limit first (e.g. 6.3 bar test = 630 kPa) so both sides of the log use one unit. Common practice on mine sites and processing plants

Home carbonation runs 2-3 bar (200-300 kPa) at fridge temperature; SodaStream bottles peak near 4 bar (400 kPa), which is why regulators carry both scales

Weather bridge: 1,013 hPa on a BOM synoptic chart = 101.3 kPa = 1.013 bar, so a summer low of 985 hPa is 98.5 kPa — handy when the forecast map and an engineering spec disagree in style

For PSI-minded mates: 1 bar = 14.5038 PSI and 100 kPa carries the same value — convert through bar once instead of juggling two factors, then check it against the PSI figure on the placard

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