kPa to PSI Converter – Instant Pressure Conversion Tool
Convert kPa to psi as you type.
US Standard Pressure Converter & CalculatorReference 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
Multiply your kPa value by 0.145038 to get PSI. One kilopascal equals 1,000 pascals, and one PSI equals 6,894.76 pascals — one quick multiplication handles any reading.
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 show up on imported-car tire stickers, Canadian weather reports, SI engineering datasheets, international plumbing specs, and medical device documentation.
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 went metric.
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 city water supply | 450 kPa | 65.2669819786 psi |
| A Canadian-market tire sticker | 220 kPa | 31.9083023006 psi |
| A drip-irrigation feed | 300 kPa | 43.5113213191 psi |
| A shop 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 an outdoor spigot reads 450 kPa; enter it for 65.3 PSI, then check it against your local 80 PSI plumbing limit.
US Appliance Installations
An American icemaker calls for a 30-120 PSI supply line; your metric gauge shows 400 kPa, which is 58.0 PSI — safely mid-range.
Sprinkler & Irrigation Design
Drip manufacturers quote 70-350 kPa operating bands while your irrigation crew works in PSI — 300 kPa at the regulator becomes 43.5 PSI.
Pneumatic Filter Servicing
A filter-change indicator trips at 70 kPa of pressure drop, equal to 10.2 PSI, so the shop's maintenance log gets the PSI figure.
Related Pressure Conversions
How to Use
-
1
Enter kPa Value
Type in the kilopascal reading — common US entries include home water pressure measured at an outdoor spigot (400-500 kPa), imported tire specs (220-250 kPa), and sea-level barometric readings (about 101 kPa)
-
2
View PSI Result
Your PSI result appears instantly. A typical municipal reading of 450 kPa converts to about 65.3 PSI
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3
Copy or Swap
Copy the result for your inspection notes, or hit Swap to run PSI back into kilopascals
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4
Check Against US Limits
Compare it against American plumbing norms: most codes cap household water at 80 PSI (551.6 kPa). If your reading runs higher — common in older Chicago or Houston neighborhoods — add a pressure-reducing valve
Why Use Be Converter?
Instant Conversion
Get precise kPa to PSI numbers in real time as you type — perfect for checking well pressure, imported tire specs, or metric spec sheets
High Accuracy
Built 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 chart with common values like 100 kPa (14.5 PSI), 220 kPa (31.9 PSI), and 700 kPa (101.5 PSI)
Bidirectional
One click flips the tool from kilopascals to PSI and back, so reverse conversions take zero extra work
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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 the kPa to PSI Converter
Our free kPa to PSI converter turns metric pressure readings into the numbers American tools, codes, and gauges actually use. Checking water pressure at your Phoenix home, installing an icemaker with a metric supply spec, designing a backyard sprinkler zone in Texas, or decoding the kPa tire sticker on a newly imported car — this tool delivers the exact PSI equivalent every time. Kilopascals show up on foreign vehicles, SI engineering documents, and medical gear, while PSI governs US plumbing codes, appliances, and shop compressors. We apply the exact factor: 1 kPa = 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 city supply), 550 kPa = 79.8 PSI (just under the 80 PSI code ceiling)
Imported-car tire stickers print 220-240 kPa — that's 31.9-34.8 PSI, matching the 32-35 PSI door-jamb figures on US-market versions of the same vehicle
Boiler loops in Northeast homes: a 150 kPa fill is 21.8 PSI and 200 kPa is 29.0 PSI; most residential relief valves pop near 210 kPa (30.5 PSI)
For quick field estimates, divide kPa by 7 and add about 2 percent; for anything recorded on a permit or inspection sheet, use the exact 0.145038 factor
Shop-air gauges often track pressure drop in kPa — a 70 kPa drop across a compressor filter (10.2 PSI) is the usual signal to swap the element
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