PSI to Kilopascals Converter 2026 | Free Pressure Conversion Tool

Pressure Conversion 2026

PSI to Kilopascals Converter

Accurate pressure conversion between pounds per square inch (PSI) and kilopascals (kPa)

Convert PSI to kilopascals instantly with precise calculations. Includes reverse kPa to PSI conversion, bar, atm, mmHg, Pa outputs, full formula reference, and pressure conversion tables for 2026.

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🔩 PSI to Kilopascals Pressure Converter

Professional pressure conversion for engineering, automotive, medical, and industrial applications

✔ Accurate Conversions

Convert PSI to kilopascals using the exact factor of 1 PSI = 6.89476 kPa, as defined by the International System of Units. Our tool delivers precise results across six pressure units simultaneously — kPa, Pa, bar, atm, mmHg, and inHg — giving you a complete multi-unit breakdown from a single input value.

✔ Bidirectional Tool

Switch seamlessly between PSI to kPa and kPa to PSI conversion modes. Whether you are reading a pressure gauge in psi and need the metric equivalent for an engineering report, or interpreting a kPa spec from a European manufacturer, both directions are covered instantly without manual calculation or lookup tables.

✔ Practical Applications

Essential for automotive tyre pressure, hydraulic systems, HVAC engineering, medical equipment, pneumatic tools, scuba diving, weather forecasting, and any field requiring conversion between imperial and metric pressure units. Particularly important for engineers, mechanics, and scientists working with international specifications and standards in 2026.

🔩 Convert PSI to Kilopascals

Select conversion direction and enter your pressure value below

Enter Pressure — PSI (pounds per square inch)

Enter your pressure value in PSI — e.g., 32 PSI = standard car tyre pressure

Enter Pressure — kPa (kilopascals)

Enter your pressure value in kilopascals — e.g., 220 kPa = standard car tyre pressure

Kilopascals (kPa)

Equivalent pressure

Complete Pressure Breakdown

PSI

kPa

bar

atm

mmHg (Torr)

Detailed Breakdown

Understanding PSI to Kilopascals Conversion

PSI (pounds per square inch) is the dominant pressure unit in the United States, Canada, and other countries still using the imperial system. It measures the force of one pound-force applied over an area of one square inch. PSI is used everywhere from car tyre pressures and bicycle pumps to hydraulic machinery, natural gas pipelines, and medical oxygen tanks. Kilopascals (kPa) is the metric equivalent used across Australia, Europe, and most of the scientific world, forming part of the International System of Units (SI) where 1 kPa = 1,000 pascals (Pa).

The conversion factor between PSI and kPa is 6.89476 — meaning 1 PSI equals 6.89476 kPa exactly, derived from the definition of one pound-force and one square inch in SI base units. Because both units measure the same physical quantity — force per unit area — the conversion is a straightforward multiplication or division. However, understanding the scale difference is important: a car tyre at 32 PSI equals approximately 220.6 kPa, making the kPa value about 6.9 times larger numerically. You can review the SI pressure unit definitions from the NIST SI Units reference.

📐 PSI to Kilopascals Conversion Formula

kPa = PSI × 6.89476

PSI = kPa ÷ 6.89476

Pa = PSI × 6894.76

bar = PSI × 0.0689476

atm = PSI × 0.068046

mmHg (Torr) = PSI × 51.7149

Example: 32 PSI × 6.89476 = 220.63 kPa

🔩 PSI to kPa — Pressure Scale Visual Guide

1 PSI

→

6.895 kPa

→

6,894.76 Pa

→

0.06895 bar

→

51.715 mmHg

1 PSI = 6.895 kPa = 6,894.76 Pa = 0.06895 bar = 0.06805 atm = 51.715 mmHg — all representing the exact same pressure expressed in different unit systems used worldwide.

PSI to Kilopascals Conversion Table

The table below provides quick reference values for the most common pressure values used in automotive, industrial, medical, and engineering applications in 2026. For related unit conversions, see our Atmospheres to Pascals Converter.

PSI	kPa	bar	atm	mmHg	Common Application
1 PSI	6.895 kPa	0.0689 bar	0.0680 atm	51.71 mmHg	Low pressure reference
5 PSI	34.47 kPa	0.3447 bar	0.3402 atm	258.57 mmHg	CPAP therapy (low)
10 PSI	68.95 kPa	0.6895 bar	0.6805 atm	517.15 mmHg	Pneumatic tools (light)
14.696 PSI	101.325 kPa	1.0133 bar	1.000 atm	760.00 mmHg	Standard atmosphere (sea level)
15 PSI	103.42 kPa	1.0342 bar	1.0207 atm	776.72 mmHg	Above standard atmosphere
32 PSI	220.63 kPa	2.2063 bar	2.177 atm	1,654.88 mmHg	Standard car tyre (recommended)
35 PSI	241.32 kPa	2.4132 bar	2.382 atm	1,810.02 mmHg	SUV / truck tyre
40 PSI	275.79 kPa	2.7579 bar	2.722 atm	2,068.60 mmHg	High-pressure tyre / van
60 PSI	413.69 kPa	4.1369 bar	4.082 atm	3,102.89 mmHg	Road bicycle tyre
100 PSI	689.48 kPa	6.8948 bar	6.805 atm	5,171.49 mmHg	Industrial pneumatics
120 PSI	827.37 kPa	8.2737 bar	8.165 atm	6,205.78 mmHg	Air compressor standard
145 PSI	999.74 kPa	9.9974 bar	9.867 atm	7,498.66 mmHg	≈ 1,000 kPa / 10 bar

PSI → kPa Quick Reference

1 PSI6.895 kPa

5 PSI34.47 kPa

10 PSI68.95 kPa

14.696 PSI (1 atm)101.325 kPa

32 PSI (car tyre) ★220.63 kPa

35 PSI241.32 kPa

60 PSI413.69 kPa

100 PSI689.48 kPa

120 PSI827.37 kPa

Kilopascals to PSI Reverse Conversion Table

Use this table when reading pressure values in kPa from European or Australian specifications, instruments, or vehicle manuals and needing to understand them in the more familiar PSI unit.

kPa	PSI	bar	atm	Common Application
10 kPa	1.450 PSI	0.100 bar	0.0987 atm	Low gauge pressure
50 kPa	7.252 PSI	0.500 bar	0.4935 atm	CPAP therapy
100 kPa	14.504 PSI	1.000 bar	0.9869 atm	Near-standard atmosphere
101.325 kPa	14.696 PSI	1.0133 bar	1.000 atm	Standard atmosphere (sea level)
150 kPa	21.756 PSI	1.500 bar	1.481 atm	Low tyre / sports ball
220 kPa	31.908 PSI	2.200 bar	2.172 atm	Standard car tyre (metric)
250 kPa	36.259 PSI	2.500 bar	2.467 atm	SUV / light truck tyre
400 kPa	58.015 PSI	4.000 bar	3.948 atm	Road bicycle / racing tyre
700 kPa	101.526 PSI	7.000 bar	6.908 atm	Industrial compressor
1,000 kPa	145.038 PSI	10.000 bar	9.869 atm	Heavy-duty hydraulics

kPa → PSI Quick Reference

10 kPa1.450 PSI

50 kPa7.252 PSI

100 kPa14.504 PSI

101.325 kPa (1 atm) ★14.696 PSI

220 kPa (car tyre) ★31.908 PSI

250 kPa36.259 PSI

400 kPa58.015 PSI

700 kPa101.526 PSI

1,000 kPa145.038 PSI

Real-World PSI to kPa Applications in 2026

PSI and kPa are both used constantly in everyday life and professional engineering. Converting accurately between them is critical across many fields.

🚗 Automotive Tyre Pressure

Most passenger car tyres are recommended at 30–35 PSI (207–241 kPa). Australian and European vehicles display tyre pressure specs in kPa on the door jamb sticker, while many traditional gauges read in PSI. A tyre under-inflated by just 6 PSI (41 kPa) can reduce fuel efficiency by up to 3% and significantly increase tyre wear and blowout risk at highway speeds.

🔧 Hydraulic & Pneumatic Systems

Industrial hydraulic systems operate at 1,000–5,000 PSI (6,895–34,474 kPa), while pneumatic tools typically require 90–120 PSI (621–827 kPa). Engineers specifying system pressures must convert between PSI (common in US equipment manuals) and kPa (required in Australian and European engineering documents and compliance reports) to ensure correct component ratings and safety standards.

🌡️ HVAC & Refrigeration

Heating, ventilation, air conditioning, and refrigeration systems use both PSI and kPa depending on the equipment manufacturer's country of origin. Refrigerant pressures in R-410A systems typically range from 120–400 PSI (827–2,758 kPa) on the high side. HVAC technicians in Australia regularly convert between PSI on US-made gauges and kPa specifications in local standards.

🏥 Medical Equipment

Medical oxygen and anaesthetic gas systems, ventilators, blood pressure cuffs, and CPAP machines all use pressure measurements. Blood pressure is expressed in mmHg (torr), oxygen cylinder pressures in kPa or PSI, and CPAP therapy settings in cm H₂O or hPa. Clinical engineers and biomedical technicians frequently need to convert between these units when calibrating or specifying equipment.

🤿 Scuba Diving

Scuba tanks are typically filled to 3,000 PSI (20,684 kPa / 207 bar) for aluminium tanks or 3,500 PSI (24,132 kPa / 241 bar) for steel tanks. Dive computers and gauges sold in the US display PSI while those sold in Australia and Europe display bar or kPa. A diver at 30 metres depth experiences approximately 4 atm (58.8 PSI / 405 kPa) of ambient pressure.

☁️ Meteorology & Weather

Atmospheric pressure is measured in hPa (hectopascals) or mbar for weather forecasting, equivalent to 100 Pa. Standard sea-level pressure is 101,325 Pa = 101.325 kPa = 14.696 PSI. Weather stations across Australia report pressure in hPa on Bureau of Meteorology forecasts, and converting to PSI or kPa is needed when interpreting international aviation or maritime weather reports.

💡 PSI Gauge vs PSI Absolute — Important Difference

Pressure is measured as either gauge pressure (PSIG) — relative to atmospheric pressure — or absolute pressure (PSIA) — relative to a perfect vacuum. A car tyre at 32 PSIG has an absolute pressure of approximately 32 + 14.7 = 46.7 PSIA. The same distinction applies to kPa: kPag (gauge) vs kPaA (absolute). When converting PSI to kPa, always confirm whether the value is gauge or absolute, as using the wrong reference can cause significant errors in engineering calculations and safety assessments.

How to Convert PSI to Kilopascals — Step by Step

Converting PSI to kPa is a single multiplication. Here is the full process, including all related pressure units.

Step 1: Identify your PSI value — e.g., 32 PSI (standard car tyre).
Step 2: Multiply by the conversion factor 6.89476 — e.g., 32 × 6.89476 = 220.63 kPa.
For Pa: Multiply PSI by 6,894.76 — e.g., 32 × 6,894.76 = 220,632 Pa.
For bar: Multiply PSI by 0.0689476 — e.g., 32 × 0.0689476 = 2.2063 bar.
For atm: Multiply PSI by 0.068046 — e.g., 32 × 0.068046 = 2.177 atm.
For mmHg: Multiply PSI by 51.7149 — e.g., 32 × 51.7149 = 1,654.88 mmHg.
Reverse (kPa → PSI): Divide by 6.89476 — e.g., 220.63 ÷ 6.89476 = 32 PSI.

✅ Key Pressure Conversion Facts — 2026 Reference

1 PSI = 6.89476 kPa
1 PSI = 6,894.76 Pa
1 PSI = 0.0689476 bar
1 PSI = 0.068046 atm
1 PSI = 51.7149 mmHg (Torr)
1 PSI = 2.03602 inHg (inches of mercury)
Standard atmosphere = 14.696 PSI = 101.325 kPa = 1.01325 bar

⚠️ Common PSI to kPa Mistakes to Avoid

A frequent error is confusing kPa and Pa — they differ by a factor of 1,000. A tyre at 220 kPa is not 220 Pa (which would be nearly a vacuum). Also, do not confuse bar and kPa — 1 bar = 100 kPa, not 1 kPa. Another common mistake is failing to distinguish between gauge pressure (relative to atmosphere) and absolute pressure — always check whether your source measurement is gauge (PSIG / kPag) or absolute (PSIA / kPaA) before performing critical engineering or safety calculations.

Frequently Asked Questions — PSI to Kilopascals Converter

How do I convert PSI to kilopascals?

Multiply your PSI value by 6.89476 to get kilopascals. For example, 30 PSI × 6.89476 = 206.84 kPa. To convert in reverse, divide the kPa value by 6.89476 to get PSI. The conversion factor 6.89476 is the exact ratio derived from SI definitions of force (pound-force = 4.44822 N) and area (1 square inch = 0.000645 m²).

What is 32 PSI in kilopascals?

32 PSI equals 220.63 kPa. This is the standard recommended tyre pressure for most passenger cars. On Australian and European tyre placard stickers (found on the driver's door jamb or inside the fuel cap), this same pressure is listed as approximately 220 kPa. Both values represent identical pressure — just expressed in different unit systems.

What is 100 kPa in PSI?

100 kPa equals approximately 14.504 PSI. Note that standard atmospheric pressure at sea level is 101.325 kPa (14.696 PSI), so 100 kPa is just below one standard atmosphere. In Australian tyre pressure contexts, 100 kPa is a very low gauge pressure — most car tyres require 200–250 kPa (29–36 PSI) of gauge pressure.

What is standard atmospheric pressure in PSI and kPa?

Standard atmospheric pressure (1 atm) is defined as exactly 101,325 Pa = 101.325 kPa = 14.696 PSI = 1.01325 bar = 760 mmHg. This is the average air pressure at sea level and is used as the reference point for gauge pressure measurements. A tyre reading of 32 PSIG means the tyre is 32 PSI above atmospheric pressure, giving an absolute pressure of approximately 46.7 PSIA (321.95 kPa absolute).

What is the difference between PSI and kPa for tyre pressure?

PSI and kPa measure the same tyre pressure — only the scale differs. A tyre at 32 PSI equals 220.6 kPa. Australian vehicles specify tyre pressure in kPa on door stickers, while many gauges (especially older ones) display PSI. Inflating to 220 kPa on a metric gauge gives the same result as 32 PSI on an imperial gauge. Always check your vehicle's specific recommendation, as it varies between models and load conditions.

How many PSI is 1 bar?

1 bar equals 14.5038 PSI, or equivalently 100 kPa. Bar is a common pressure unit in European engineering and industrial applications. It is very close to but not exactly equal to 1 atmosphere (1 atm = 1.01325 bar = 14.696 PSI). Car tyre pressures in Europe are often expressed in bar — a tyre at 2.2 bar equals 31.91 PSI or 220 kPa.

What is 145 PSI in kPa?

145 PSI equals approximately 999.74 kPa — very close to exactly 1,000 kPa (1 MPa or 10 bar). This is why 145 PSI is often used as a convenient reference point for engineers working in mixed unit systems. Many industrial compressors and hydraulic systems are rated to 145 PSI / 1,000 kPa / 10 bar, making this a common crossover benchmark in engineering specifications.

Pressure Conversion Resources

📘 The SI Pascal Defined

The pascal (Pa) is the SI derived unit of pressure, defined as one newton per square metre (N/m²). It was named after Blaise Pascal and adopted by the International System of Units. The kilopascal (kPa = 1,000 Pa) is the standard pressure unit in most engineering and scientific contexts, replacing older units like PSI, atm, and bar in metric-system countries.

NIST SI Reference →

🚗 Tyre Pressure Standards

Australian vehicles manufactured from 2006 onward are required to display tyre pressure in kPa on the tyre placard (door jamb sticker). The recommended range for most passenger cars is 200–250 kPa (29–36 PSI). Under-inflation by 20 kPa (3 PSI) can reduce tyre life by 10% and increase fuel consumption — making accurate PSI to kPa conversion essential for vehicle maintenance.

Atm to Pa →

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