Convert Kilopascals to PSI — Free kPa to PSI Calculator

Convert kPa to psi as you type.

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

1 kPa ≈ 0.1450377377 psi

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 PSI

psi

PSI

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 — international foot / SI units

kpa → psi — Worked examples

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

Kilopascal to PSI Conversion Formula

To convert kilopascals to PSI, multiply the kPa value by 0.145038. One kilopascal equals 1,000 pascals and one PSI (pound per square inch) equals 6,894.76 pascals.

1 kPa ≈ 0.1450377377 psi

Kilopascal and PSI 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. Everyday Australian pressures land in tidy hundreds under it: sea-level air at 101.325 kPa, family sedan tyres at 220 kPa, suburban mains water around 400 kPa. The unit chains neatly through the metric system, with 100 kPa making one bar and 1,000 kPa making one megapascal, so a single reading serves plumbing, weather and hydraulic contexts alike.

Where it is used: Kilopascals anchor Australian tyre placards, Bureau of Meteorology forecasts, AS/NZS plumbing standards, engineering datasheets and medical device specifications.

Origin: The prefix kilo attached to the pascal after the unit became the SI pressure standard in 1971, filling the gap between raw pascals and industrial megapascals.

PSI (psi)

PSI (pound-force per square inch) is the imperial pressure unit: one pound of force pressing on one square inch. It equals 6,894.76 pascals, or 6.89476 kPa. Even though Australia went fully metric decades ago, PSI still turns up on imported American tools, older workshop gauges and many 4WD accessories — household water spans 43.5-72.5 PSI (300-500 kPa), car tyres sit around 32-36 PSI, and workshop compressors run 90-175 PSI.

Where it is used: PSI remains the default on American-made equipment, pool filter gauges, imported air tools and plenty of aftermarket 4WD gear sold in Australia.

Origin: Rooted in 19th-century British engineering that paired the pound-force with the square inch, the unit survives as a US customary standard long after Britain and Australia metricated.

Kilopascal to PSI Conversion Table

Select a value to use it in the calculator.

Kilopascal (kPa)	PSI (psi)
	0.1450377377 psi
	0.2900754755 psi
	0.7251886887 psi
	1.4503773773 psi
	2.9007547546 psi
	7.2518868865 psi
	10.1526416411 psi
	14.503773773 psi
	14.6959487755 psi
	21.7556606595 psi
	29.007547546 psi
	31.9083023006 psi
	36.2594344326 psi
	43.5113213191 psi
	50.7632082056 psi
	58.0150950921 psi
	65.2669819786 psi
	72.5188688651 psi
	87.0226426381 psi
	101.5264164111 psi

PSI to Kilopascal Conversion Table

PSI (psi)	Kilopascal (kPa)
1 psi	6.8947572932 kPa
5 psi	34.4737864658 kPa
10 psi	68.9475729317 kPa
14.5 psi	99.9739807509 kPa
20 psi	137.8951458634 kPa
25 psi	172.3689323292 kPa
30 psi	206.8427187951 kPa
32 psi	220.6322333814 kPa
35 psi	241.3165052609 kPa
36 psi	248.2112625541 kPa
40 psi	275.7902917267 kPa
50 psi	344.7378646584 kPa
60 psi	413.6854375901 kPa
80 psi	551.5805834535 kPa

Kilopascal to PSI in Everyday Objects

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

	Kilopascal (kPa)	PSI (psi)
A suburban mains water supply	450 kPa	65.2669819786 psi
A 4WD tyre deflated for beach driving	220 kPa	31.9083023006 psi
A backyard drip-irrigation line	300 kPa	43.5113213191 psi
A workshop air compressor	600 kPa	87.0226426381 psi
A rainwater tank pump	400 kPa	58.0150950921 psi
A pool filter gauge	700 kPa	101.5264164111 psi

When You Need Kilopascal to PSI Conversions

Home Water Pressure Tests

A test gauge screwed onto the garden tap reads 400 kPa; enter it to get 58.0 PSI before comparing against the 500 kPa (72.5 PSI) Australian plumbing cap.

Imported Appliance Installs

An American fridge with an icemaker specifies a 30-120 PSI supply; your metric test shows 400 kPa, which converts to 58.0 PSI — comfortably mid-range.

Irrigation for Dry-Climate Gardens

Drip manufacturers quote 70-350 kPa operating bands, and the imported controller thinks in PSI — 300 kPa becomes 43.5 PSI at the regulator for a Perth summer veggie patch.

4WD Beach Driving Prep

You air down to 130 kPa at the K'gari barge landing but your deflator gauge reads PSI only — 130 kPa converts to 18.9 PSI, a safe sand pressure.

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How to Use

1

Enter kPa Value

Type in your kilopascal reading — typical entries include family sedan tyres (220-250 kPa), 4WD tyres run down for beach driving (110-160 kPa) and suburban mains water (around 400 kPa)
2

View PSI Result

The PSI equivalent appears instantly. For example, 230 kPa converts to about 33.4 PSI
3

Copy or Swap

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

Check Against Australian Standards

Compare with Australian plumbing rules: AS/NZS 3500 generally caps mains water at 500 kPa (72.5 PSI) at the tap, so fit a pressure-limiting valve if your reading runs higher

Why Use Be Converter?

Instant Conversion

Get precise kPa to PSI results in real time as you type — handy for tyre checks, pool filter gauges and mains water tests

High Accuracy

Runs on the exact international standard: 1 kPa = 1,000 Pa and 1 PSI = 6,894.76 Pa, accurate to 6 decimal places

Conversion Table

Quick reference with common values like 220 kPa (31.9 PSI), 300 kPa (43.5 PSI) and 500 kPa (72.5 PSI)

Bidirectional

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

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No registration required. Unlimited conversions. Completely free forever

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Frequently Asked Questions

How many PSI is 1 kPa?

1 kPa equals 0.145038 PSI. Scaling up, 100 kPa = 14.5 PSI and 1,000 kPa = 145.0 PSI, which is why metric gauges read roughly seven times the PSI figure.

What is 220 kPa in PSI?

220 kPa × 0.145038 = 31.9 PSI — a common cold tyre pressure on Australian-delivered sedan placards, matching the 32 PSI stamped on imported US-spec vehicles.

What is the difference between kPa and PSI?

The kilopascal is the SI metric pressure unit used across Australia for weather maps, tyre placards and plumbing standards, while PSI is the imperial unit on imported American gauges, dive gear and older equipment. They measure identical physics on different scales: 1 PSI = 6.89476 kPa.

How do I convert water pressure from kPa to PSI?

Multiply kPa by 0.145038. A suburban mains supply at 400 kPa equals 58.0 PSI, a strong connection at 500 kPa equals 72.5 PSI, and a garden line regulated to 300 kPa equals 43.5 PSI for drip irrigation.

How many kPa are in 1 PSI?

6.89476 kPa per PSI — the exact inverse of the 0.145038 forward factor. So a 50 PSI compressor reading is 344.7 kPa, and a 90 PSI tank cutout is 620.5 kPa.

How many PSI is 300 kPa?

300 kPa × 0.145038 = 43.5 PSI. That's a typical drip-irrigation feed for a Perth or Adelaide veggie garden, or a low-pressure supply line, well under the 500 kPa mains cap.

What is normal house water pressure?

In Australian homes the mains supply typically runs 300-500 kPa — about 43.5-72.5 PSI. AS/NZS 3500 caps static pressure at 500 kPa, so anything above that calls for a pressure-limiting or reducing valve.

How do I estimate kPa to PSI without a calculator?

Divide kPa by 7: 230 ÷ 7 ≈ 32.9, close to the exact 33.4 PSI. The shortcut works because 1 PSI = 6.89476 kPa; switch to the precise 0.145038 factor for anything you're writing down.

About Kilopascal to PSI Converter

Our free online kPa to PSI converter turns metric pressure readings into the PSI figures you'll spot on imported American tools, 4WD gauges and pool equipment. Whether you're checking mains water pressure against the Australian 500 kPa standard, setting beach-driving tyre pressures from a PSI-only deflator, servicing an imported air compressor, or sizing a drip-irrigation line for a Perth summer, this tool delivers the exact equivalent. Kilopascals are the official unit right across Australia — on Bureau of Meteorology maps, tyre placards and plumbing specs — while PSI still rules American-made gear and plenty of workshop gauges. Our converter applies the exact factor where 1 kPa equals 0.145038 PSI.

Expert Tips for Kilopascal to PSI Conversion

Water-pressure anchors: 300 kPa = 43.5 PSI (drip irrigation), 400 kPa = 58.0 PSI (typical suburban mains), 500 kPa = 72.5 PSI (the AS/NZS 3500 ceiling at the tap)

Tyre placards on Australian-delivered cars print 210-250 kPa — that's 30.5-36.3 PSI, handy when you're borrowing a mate's US-spec gauge

Beach driving: dropping 4WD tyres to 120-160 kPa (17.4-23.2 PSI) is standard on the sand at K'gari or Cable Beach; reinflate to placard pressure before hitting 110 km/h highways

For quick field estimates divide kPa by 7 and add 2 percent; for anything recorded on paper use the exact 0.145038 factor instead

Pool and workshop gauges often show PSI only — a filter reading of 10 PSI is 68.9 kPa, and a 90 PSI compressor cutout equals 620.5 kPa

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