Ounce or Ounce Force per Square Inch is a low pressure unit which is part of the British and American system of units. 1 ounce per square inch equals 430.922 pascals.
The ozf/in² is used mostly for very low pressure rated equipment such as breather valves or controllers for LP natural gas appliances.
There are exactly 16 oz/in² in 1 psi which duplicates the relationship between pounds and ounces used to measure mass and weight.
To convert 1 oz/in² into other pressure units please use the list of conversion factors below.
Click on a pressure unit link to obtain the equivalent oz/in² conversion value.
To convert different different values of ozf/in² please use our on page pressure calculator.
See how oz/in² are derived from SI units and check whether a unit matches one of the versions of identifying oz/in2.
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Conversion Factors
- 0.00430922 bar
- 0.0625 psi
- 4.30922 mbar
- 430.922 N/m²
- 430.922 Pa
- 4.30922 hPa
- 0.430922 kPa
- 0.000430922 MPa
- 0.00439418 kg/cm²
- 43.9418 mmH2O 4°C (39.2°F)
- 4.39418 cmH2O 4°C (39.2°F)
- 0.0439418 mH2O 4°C (39.2°F)
- 1.72999 inH2O 4°C (39.2°F)
- 0.144166 ftH2O 4°C (39.2°F)
- 3.23218 mmHg 0°C (32°F)
- 0.323218 cmHg 0°C (32°F)
- 0.127251 inHg 0°C (32°F)
- 3.23218 Torr
- 3232.18 mTorr
- 0.00425287 atm
- 0.00439418 at
- 4309.22 dyn/cm²
- 1 oz/in²
- 3232.18 µHg 0°C (32°F)
- 0.0000279018 tsi (uk, long)
- 0.00003125 tsi (usa, short)
- 0.0045 tsf (usa, short)
- 9 psf
- 4.39418 g/cm²
Please note that the conversion factors above are accurate to 6 significant figures.
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Clean room monitoring system to measure pressure, humidity & temperature in 4 individual rooms - A complete clean room measurement system for 4 separate rooms, each with its own room pressure, humidity and air temperature indicator, and a central monitoring unit for clean room corridor or control room.
DPS200 HVAC Differential Pressure Transmitter - Differential air pressure sensor with a 10 volt or a 4-20mA output for building ventilation applications. Ranges from 0 to 6 mbar up to 0 to 1000 mbar.
Derivation
The calculation below shows how the pressure unit Ounce per Square Inch (oz/in²) is derived from SI Units.
Formula
- Pressure = Force / Area
- Force = Mass x Acceleration
- Acceleration = Distance / (Second x Second)
SI Units
- Mass: kilogram (kg)
- Length: metre (m)
- Time: second (s)
- Force: newton (N)
- Pressure: pascal (Pa)
Input Values
- 1 Ounce = 0.02834952313 kg
- 1 Inch = 0.0254 m
- 1 Square Inch = 0.0254 m x 0.0254 m = 0.00064516 m²
- Acceleration = Standard Gravity = 9.80665 m/s²
Calculation
- 1 Ounce Force = 0.02834952313 kg x 9.80665 m/s² = 0.278013851 N
- 1 oz/in² Pressure = 0.278013851 N / 0.00064516 m² = 430.9223309 Pa
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DPC Low Range Pressure Controller and Calibrator - The DPC low range pressure controller calibrator measures and generates low range pressures over 1, 10, 100 or 1000 mbar, and can be used as a pressure measurement device or as a test and calibration device for pressure sensors and pressure switches.
Measuring HVAC plenum and sub-floor air pressure in data centers - Monitoring the critical air pressure gradients in data center sub-floors, server rooms, and ceiling plenums. Low range differential pressure transmitter provides stable gauge pressure readings for optimizing HVAC and cooling efficiency.
Alternate Descriptions
These are the different versions used for identifying oz/in² that you may find elsewhere.
- Ounce per Square Inch
- Ounce Force per Square Inch
- Ounces per Square Inch
- Ounces Force per Square Inch
- oz/in²
- ozf/in²
- oz/in^2
- ozf/in^2
- oz/sq in
- ozf/sq in
Conversion Tables
Select a look up table for converting a pressure reading in ounces force per square inch to other measurement units.
- psi » 0.1 to 2000 oz/in² → 0.0625 to 125.000 psi
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- PrimAtü 10 Low Cost Low Range Differential Air Pressure Transducer - The PrimAtü 10 low cost low range differential air pressure transducer can detect and display both positive and negative differential pressure variations of very low low pressure ranges from 0.5 up to 1000 mbar/hPa, and output the pressure as a 4-20mA, 0-20mA or a 0-10Vdc analog output.
Low Pressure Data Loggers - Low pressure data loggers offer precise and reliable tracking of gauge or differential air pressures in critical environments such as ventilation systems and clean rooms.
Glossary of Low Pressure technical terms
- g Effect
- inH2O – Inches of Water Column at 4 deg C Pressure Unit
- mmH2O – Millimetres of Water Column at 4 deg C Pressure Unit
- Pa – Pascal Pressure Unit
