kg/cm² to PSI Converter

Kilogramme-force per Square Centimetre (kg/cm²)

Pounds per Square Inch (PSI)

Converting between kg/cm² and psi matters when you’re dealing with hydraulic equipment, older pressure gauges, or specifications from different countries. Industrial machinery often uses kg/cm² in Asia and Europe, whilst psi dominates in the UK and US. This converter gives you accurate results instantly, whether you’re checking compressor ratings, tyre pressures on heavy equipment, or verifying hydraulic system specs.

How the Conversion Works

The conversion between these pressure units relies on a fixed mathematical relationship. One kg/cm² equals 14.22334 psi. This value comes from the international definition of pressure units, where kg/cm² represents kilogramme-force per square centimetre.

To convert kg/cm² to psi, multiply by 14.22334. Going the other way, divide psi by 14.22334 to get kg/cm². Results shown here round to 2 decimal places for practical use, though the converter stores full precision internally. For most engineering applications, 2 decimal places provide sufficient accuracy.

The kg/cm² unit, also called a technical atmosphere, equals 98,066.5 pascals. It’s deprecated in modern SI standards but remains common in older equipment documentation and certain industries. Meanwhile, psi measures force in pounds over area in square inches, standard across Anglo-American engineering.

Related Pressure Conversions

From	To	Multiply By
kg/cm²	bar	0.980665
kg/cm²	kPa	98.0665
kg/cm²	MPa	0.0980665
psi	bar	0.0689476
psi	kPa	6.89476

Standard Conversion Values

kg/cm²	PSI
0.5	7.11
1	14.22
2	28.45
3	42.67
5	71.12
7	99.56
10	142.23
15	213.35
20	284.47
50	711.17
100	1,422.33
150	2,133.50

Where You’ll Need This

Hydraulic systems present the most common scenario. European and Asian manufacturers often rate their equipment in kg/cm², whilst UK engineers work in psi. A hydraulic press rated at 200 kg/cm² delivers 2,844.67 psi. Getting this right prevents equipment damage and safety issues.

Older pressure gauges in factories still display kg/cm². When maintenance specs call for 5.5 psi, you need to know that’s 0.39 kg/cm² on your gauge. Industrial compressors from different regions also mix units—a Japanese compressor rated at 8 kg/cm² outputs 113.79 psi.

Heavy equipment tyres show another practical case. Agricultural machinery from continental Europe might specify 3.2 kg/cm² tyre pressure, equal to 45.51 psi. Construction equipment imports often arrive with kg/cm² specifications that need converting for UK service procedures.

Engineering drawings and technical manuals create conversion needs too. An Italian pump specification of 12 kg/cm² maximum pressure translates to 170.68 psi. Chemical processing plants with international equipment see this daily.

Quick Mental Maths

For rough estimates, remember that 1 kg/cm² equals roughly 14 psi. This lets you quickly approximate—7 kg/cm² is about 98 psi without a calculator. The actual value is 99.56 psi, so you’re within 2% for quick decisions.

Another handy reference: 10 kg/cm² equals 142 psi. Double or halve from there for fast mental conversions. This approximation works fine for initial assessments, but always use precise values for final specifications or safety-critical applications.

About These Pressure Units

The kg/cm² unit emerged from metric engineering traditions in Europe and Asia. It represents the pressure exerted by one kilogramme-force over one square centimetre. Despite being replaced by the pascal in formal SI standards, it persists in hydraulic engineering, especially with equipment manufactured before 2000.

PSI became standard in British and American engineering during industrialisation. It measures pounds of force per square inch of area. The UK formally adopted metric units in the 1960s, yet psi remains dominant in many sectors—pneumatic systems, tyre pressures, gas cylinders, and petroleum engineering all still work primarily in psi.

Both units measure gauge pressure in most applications, meaning they read zero at atmospheric pressure. Absolute pressure measurements add roughly 14.7 psi or 1.03 kg/cm² to account for atmospheric pressure. Always check whether specifications refer to gauge or absolute pressure.

FAQs

What does kg/cm² stand for?

Kilogramme-force per square centimetre, sometimes written kgf/cm². It measures how many kilogrammes of force press on each square centimetre of area. One kg/cm² equals 14.22334 psi or 98,066.5 pascals.

Is kg/cm² the same as bar?

Nearly, but not exactly. One kg/cm² equals 0.980665 bar—about 2% less than one bar. For rough work they’re often treated as equivalent, but precise engineering requires the actual conversion factor.

Why do some countries still use kg/cm²?

Older equipment and established industries continue using kg/cm² because changing all documentation, gauges, and training would cost millions. It’s particularly common in Asian manufacturing and European hydraulics. Engineers in these regions understand it intuitively.

How accurate does my conversion need to be?

Two decimal places suit most applications—hydraulic systems, tyre pressures, compressor ratings. Safety-critical systems like aircraft or medical equipment may require more precision. Always follow your industry’s specific standards.

What’s the difference between gauge and absolute pressure?

Gauge pressure reads zero at atmospheric pressure—what most pressure gauges show. Absolute pressure includes atmospheric pressure, so it’s about 14.7 psi or 1.03 kg/cm² higher. Vacuum systems and scientific work typically use absolute pressure.

Can I use this converter for tyre pressures?

Yes, though car tyres typically use psi or bar. Heavy equipment and agricultural machinery from certain manufacturers specify tyre pressure in kg/cm². A typical agricultural tyre at 2.8 kg/cm² equals 39.83 psi.

What pressure unit should I use in the UK?

PSI remains standard in most UK industries despite metrication. Bar is also common, especially in automotive and pneumatic systems. Use whatever unit your equipment or specifications require, but know how to convert between them.

How do I convert multiple values quickly?

Use the quick conversion buttons above for common values. For batches of numbers, multiply each kg/cm² value by 14.22334 to get psi. A spreadsheet formula makes this instant for dozens of values at once.