Kilogram or Kilogram Force per Square Centimeter (kg/cm2 or kgf/cm2) is a pressure unit that has been largely superseded by the SI unit system of pascal units. It is the metric equivalent of pounds per square inch (psi). 1 kg/cm2 equals 98,066.5 pascals.

Similarly to psi, kg/cm2 is part of a group of pressure units that relate pressure with weight. This is convenient in applications where a pressure is applied to generate a load such as in material testing. Typically a piston cylinder device is utilised to convert the applied pressure into a force. The force can be easily calculated in kilograms weight by multiplying the kg/cm2 pressure by the area to determine the weight applied in kilogrammes.

The most popular way of writing Kilogrammes per Square Centimeter is as kg/cm2, even though kgf/cm2 describes its meaning more accurately. The conventional way of writing it is misleading to some, since it reads as Mass / Unit Area and leads to confusion since pressure is always defined as Force / Unit Area.

To calculate a kg/cm2 reading into another pressure unit you can multiply it by one of the values in the table below. To convert a value to kgf/cm2 just click on the relevant unit below to obtain the reverse conversion factor.

Alternatively If you have a number of values to convert you can use the pressure converter to save time.

Find out how kg/cm2 is calculated from SI units and view the alternative ways of writing kg/cm2.

Contents

## Conversion Factors

- 0.980665 bar
- 14.2233 psi
- 980.665 mbar
- 98066.5 N/m²
- 98066.5 Pa
- 980.665 hPa
- 98.0665 kPa
- 0.0980665 MPa
- 1 kgf/cm²
- 10000 mmH2O 4°C (39.2°F)
- 1000 cmH2O 4°C (39.2°F)
- 10 mH2O 4°C (39.2°F)
- 393.701 inH2O 4°C (39.2°F)
- 32.8084 ftH2O 4°C (39.2°F)
- 735.559 mmHg 0°C (32°F)
- 73.5559 cmHg 0°C (32°F)
- 28.9590 inHg 0°C (32°F)
- 735.559 Torr
- 735559 mTorr
- 0.967841 atm
- 1 at
- 980665 dyn/cm²
- 227.573 oz/in²
- 735559 µHg 0°C (32°F)
- 0.00634971 tsi (uk, long)
- 0.00711167 tsi (usa, short)
- 1.02408 tsf (usa, short)
- 2048.16 psf
- 1000 g/cm²

*Please note that the conversion factors above are accurate to 6 significant figures.*

## Derivation

The calculation below shows how the pressure unit Kilogram per Square Centimetre (kg/cm²) is derived from SI Units.

#### Formula

- Pressure = Force / Area
- Force = Mass x Acceleration
- Acceleration = Distance / (Time x Time)

#### SI Units

- Mass: kilogram (kg)
- Length: metre (m)
- Time: second (s)
- Force: newton (N)
- Pressure: pascal (Pa)

#### Input Values

- 1 Kilogram = 1 kg
- 1 Centimetre = 0.01 m
- 1 Square Centimetre = 0.01 m x 0.01 m = 0.0001 m²
- Acceleration = Standard Gravity = 9.80665 m/s²

#### Calculation

- 1 Kilogram Force = 1 kg x 9.80665 m/s² = 9.80665 N
- 1 kg/cm² Pressure = 9.80665 N / 0.0001 m² = 98066.5 Pa

## Alternate Descriptions

These are the different versions used for identifying kg/cm² that you may find elsewhere.

- Kilogram per Square Centimetre
- Kilogram Force per Square Centimetre
- Kilogram per Square Centimeter
- Kilogram Force per Square Centimeter
- Kilogrammes per Square Centimetre
- Kilogrammes Force per Square Centimetre
- Kilogrammes per Square Centimeter
- Kilogrammes Force per Square Centimeter
- Kilograms per Square Centimetre
- Kilograms Force per Square Centimetre
- Kilograms per Square Centimeter
- Kilograms Force per Square Centimeter
- Kilopond per Square Centimetre
- Kilopond per Square Centimeter
- Kiloponds per Square Centimetre
- Kiloponds per Square Centimeter
- kg/cm²
- kgf/cm²
- kg/sq cm
- kgf/sq cm
- kg/cm^2
- kgf/cm^2
- kp/cm²

## Conversion Tables

Select a look up table for converting a pressure reading in kilograms force per square centimetre to other measurement units.

- bar » 1 to 1000 kg/cm² → 0.980665 to 980.665 bar
- psi » 1 to 1000 kg/cm² → 14.2233 to 14,223.3 psi
- kPa » 0.01 to 100.00 kg/cm² → 0.98067 to 980.665 kPa
- MPa » 1 to 1000 kg/cm² → 0.0980665 to 98.0665 MPa
- N/mm² » 1 to 1000 kg/cm² → 0.0980665 to 98.0665 N/mm²

## Help

### kg/m² vs kg/cm²

*Why not use kgf/m² instead of kgf/cm²?*

kgf/cm2 is equal to 0.980665 bar, 10 mH2O & 14.22 psi, so it is the right size of unit for many applications, particularly hydraulics where kgf and cm2 are measured separately.

kgf/m2 is equal to 0.0980665 mbar, 1mmH2O & 0.001422 psi, so it is a very small unit. Typically kgf is used in hydraulics so the pressure is high, and therefore this unit is not practical to use.

There is nothing stopping you using kgf/m2, it’s just not very useful for hydraulics, but it would be for low pressure, but other units such as inH2O and pascals tend to be the most popular.

### kp/cm² meaning

*What are kp/cm² units?*

kp/cm² means kiloponds per square centimetre which is a measure of pressure or tensile strength. The unit is exactly equal to kilogram force per square centimetre (kgf/cm² or kg/cm²).

A kilopond is a force equal to the weight of 1 kg being pulled by an acceleration of 9.80665 m/s² (standard gravity). A square centimetre represents the area over which the force is distributed.

### Does kg/cm² = kgf/cm²

*Is it correct to write kg/sq cm as a unit of pressure?*

It is not strictly correct, since kg is not a measure of force but of mass, but you will find that most documentation and instrumentation refer to the pressure unit as kg/cm² rather than the more correct form of kgf/cm² (kilogram force per square centimetre).

When you see kg/cm² written as a pressure unit it is assumed to be kgf/cm² since pressure can only be a quantity of ‘force’ divided by ‘area’. This is self-evident when you consider that the widely used ‘psi’ pressure unit is also a very popular shortened form of pfsi (pounds force per square inch).

kgf is the force created by the earth’s gravity at sea level (9.80665m/s² acting on a 1 kilogram mass and is defined as follows:

1 kgf = Mass x Acceleration = 1 kg x 9.80665 m/s² = 9.80665

## Measurement Unit Related Terms

More pages related to measurement unit technical terms.

- at – Technical Atmosphere Pressure Unit
- atm – Standard Atmosphere Pressure Unit
- bar Pressure Unit
- cmH2O – Centimetres of Water Column at 4 deg C Pressure Unit
- cmHg – Centimetres of Mercury at 0 deg C Pressure Unit
- daPa – Dekapascal Pressure Unit
- dyn/cm2 – Dyne per Square Centimetre Pressure Unit
- ftH2O – Feet of Water Column at 4 deg C Pressure Unit
- g – Acceleration due to Gravity
- g/cm² – Grams per Square Centimetre Pressure Unit
- hPa – Hectopascal Pressure Unit
- inH2O – Inches of Water Column at 4 deg C Pressure Unit
- inHg – Inches of Mercury at 0 degrees C Pressure Unit
- kg/mm² – Kilogram per Square Millimetre Pressure Unit
- kPa – Kilopascal Pressure Unit
- ksi – Kilopounds per Square Inch Pressure Unit
- mbar – Millibar Pressure Unit
- mH2O – Metres of Water Gauge at 4 deg C Pressure Unit
- mmH2O – Millimetres of Water Column at 4 deg C Pressure Unit
- mmHg – Millimetres of Mercury at 0 deg C Pressure Unit
- MPa – Megapascal Pressure Unit
- mPa – Millipascal Pressure Unit
- mTorr – Millitorr Pressure Unit
- N/cm² – Newton per Square Centimetre Pressure Unit
- N/m2 – Newton per Square Metre Pressure Unit
- N/mm² – Newton per Square Millimetre Pressure Unit
- oz/in² – Ounce per Square Inch Pressure Unit
- Pa – Pascal Pressure Unit
- Pressure
- Pressure Units
- psf – Pounds per Square Foot Pressure Unit
- psi – Pounds per Square Inch Pressure Unit
- Specific Gravity
- Torr Pressure Unit
- tsf – Tons per Square Foot (USA, Short) Pressure Unit
- tsi – Tons per Square Inch (UK, Long) Pressure Unit
- tsi – Tons per Square Inch (USA, Short) Pressure Unit
- Water Density
- µHg – Micron of Mercury at 0 deg C Pressure Unit