Reference for one unit; displayed values may be rounded.
Kilopascal
Use a dot or comma for decimals, without thousands separators.
PSI
Display rounding does not improve the accuracy of your original measurement. Very large or very small results use scientific notation.
Method and sourceChanging units does not change gauge pressure into absolute pressure or set a safe operating pressure.
NIST SP 811 — international foot / SI unitskpa → 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 equals 6,894.76 pascals.
Kilopascal and PSI Explained
Kilopascal (kPa)
The kilopascal (kPa) is the SI pressure unit equal to 1,000 pascals — a thousand newtons of force over one square meter. Everyday pressures land in tidy hundreds under it: sea-level air at 101.325 kPa, passenger tires at 220 kPa, household water at 450 kPa. The unit chains cleanly 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 Canadian tire stickers and forecasts, SI engineering datasheets, international plumbing codes, 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. The scale suits American infrastructure well — household water spans 40-80 PSI, car tires 32-36 PSI, and shop compressors 90-175 PSI — which keeps the unit entrenched across US gauges, codes, and manuals even as the rest of the world reads kilopascals or bar.
Where it is used: PSI is the default pressure unit in the United States for plumbing inspections, appliance ratings, tire care, and compressed-air equipment.
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 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 municipal water supply | 450 kPa | 65.2669819786 psi |
| A Canadian tire sticker | 220 kPa | 31.9083023006 psi |
| A drip-irrigation feed | 300 kPa | 43.5113213191 psi |
| A workshop air line | 600 kPa | 87.0226426381 psi |
| A home reverse-osmosis feed | 400 kPa | 58.0150950921 psi |
| A fire-sprinkler riser | 700 kPa | 101.5264164111 psi |
When You Need Kilopascal to PSI Conversions
Home Water Pressure Tests
A test gauge screwed onto a hose bib reads 450 kPa; enter it to get 65.3 PSI before comparing against the 80 PSI plumbing ceiling.
US Appliance Installations
An American icemaker specifies a 30-120 PSI supply; your metric test shows 400 kPa, which converts to 58.0 PSI — safely mid-range.
Irrigation Zone Design
Drip manufacturers quote 70-350 kPa operating bands, and the installation crew thinks in PSI — 300 kPa becomes 43.5 PSI at the regulator.
Pneumatic Filter Servicing
A filter-change indicator trips at 70 kPa of pressure drop, equal to 10.2 PSI, and the US maintenance log records the drop in PSI.
Related Pressure Conversions
How to Use
-
1
Enter kPa Value
Type the kilopascal reading — typical entries include residential water (400-500 kPa), Canadian tire stickers (220-250 kPa), and sea-level weather (about 101 kPa)
-
2
View PSI Result
The PSI equivalent appears instantly. For example, 450 kPa converts to about 65.3 PSI
-
3
Copy or Swap
Copy the result or click Swap to convert PSI back to kilopascals
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4
Check Against US Limits
Compare with American plumbing norms: codes generally cap home water at 80 PSI (551.6 kPa), so install a reducer if your reading lands higher
Why Use Be Converter?
Instant Conversion
Get precise kPa to PSI results in real-time as you type — perfect for water-pressure tests and metric spec sheets
High Accuracy
Uses 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 100 kPa (14.5 PSI), 220 kPa (31.9 PSI), and 700 kPa (101.5 PSI)
Bidirectional
Easily swap between kilopascals and PSI with one click for reverse conversions
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Frequently Asked Questions
How many PSI is 1 kPa?
What is 220 kPa in PSI?
What is the difference between kPa and PSI?
How do I convert water pressure from kPa to PSI?
How many kPa are in 1 PSI?
How many PSI is 300 kPa?
What is normal house water pressure?
How do I estimate kPa to PSI without a calculator?
About Kilopascal to PSI Converter
Our free online kilopascal to PSI converter turns metric pressure readings into the imperial figures American hardware expects. Whether you are testing household water pressure on a kPa gauge, installing a US-made icemaker against a metric supply spec, designing an irrigation zone, or reading a Canadian tire sticker with an American inflator, this tool delivers the exact equivalent. Kilopascals serve Canada, SI engineering, and medical device documentation, while PSI governs US plumbing codes, appliances, and shop equipment. 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), 450 kPa = 65.3 PSI (typical municipal supply), 550 kPa = 79.8 PSI (right at the 80 PSI code ceiling)
Canadian tire stickers print 220-240 kPa — that is 31.9-34.8 PSI, matching the 32-35 PSI on the same car sold in the United States
Boiler and heating loops: a 150 kPa fill is 21.8 PSI, while 200 kPa is 29.0 PSI; most residential relief valves open near 210 kPa (30.5 PSI)
For field estimates divide kPa by 7 and add 2 percent; for anything recorded on paper use the exact 0.145038 factor instead
Pneumatic maintenance gauges often show pressure drop in kPa — a 70 kPa filter drop (10.2 PSI) is the usual trigger to replace the element
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