Pressure Measurement Accuracy and Tolerance Calculator

Calculate Pressure Accuracy & Tolerance
Select Answer Mode	Pressure Accuracy Tolerance
Pressure [?]
⟳ Select pressure unit bar psi kg/cm² mbar kPa Pa Pa hPa kPa MPa N/m² N/mm² bar mbar mmH₂O 4°C cmH₂O 4°C dmH₂O 4°C mH₂O 4°C inH₂O 4°C ftH₂O 4°C mmHg 0°C cmHg 0°C inHg 0°C g/cm² kg/cm² dyn/cm² oz/in² psi ksi tsi uk long tsi us short tsf us short psf atm at Torr mTorr bar centimetres of mercury at 0°C centimetres of water at 4°C decimetres of water at 4°C dynes per sq centimetre feet of water at 4°C grams per sq centimetre hectopascals inches of mercury at 0°C inches of water at 4°C kilograms per sq centimetre kilopascals kilopounds per sq inch megapascals metres of water at 4°C microns of mercury at 0°C millibars millimetres of mercury at 0°C millimetres of water at 4°C millitorrs newtons per sq metre newtons per sq millimetre ounces per sq inch pascals pounds per sq foot pounds per sq inch standard atmospheres technical atmospheres tons per sq foot (us short) tons per sq inch (uk long) tons per sq inch (us short) torrs
Accuracy [?]
Select accuracy unit per cent (%) parts per million (ppm) parts per thousand (‰) parts per ten thousand (‱) parts per billion (ppb) parts per trillion (ppt)
Tolerance [?]
Select tolerance unit bar psi kg/cm² mbar kPa Pa Pa hPa kPa MPa N/m² N/mm² bar mbar mmH₂O 4°C cmH₂O 4°C dmH₂O 4°C mH₂O 4°C inH₂O 4°C ftH₂O 4°C mmHg 0°C cmHg 0°C inHg 0°C g/cm² kg/cm² dyn/cm² oz/in² psi ksi tsi uk long tsi us short tsf us short psf atm at Torr mTorr bar centimetres of mercury at 0°C centimetres of water at 4°C decimetres of water at 4°C dynes per sq centimetre feet of water at 4°C grams per sq centimetre hectopascals inches of mercury at 0°C inches of water at 4°C kilograms per sq centimetre kilopascals kilopounds per sq inch megapascals metres of water at 4°C microns of mercury at 0°C millibars millimetres of mercury at 0°C millimetres of water at 4°C millitorrs newtons per sq metre newtons per sq millimetre ounces per sq inch pascals pounds per sq foot pounds per sq inch standard atmospheres technical atmospheres tons per sq foot (us short) tons per sq inch (uk long) tons per sq inch (us short) torrs

• High Speed Pressure Sensors
• DMP331 Precision Pressure Transmitter
• KX ATEX Intrinsically Safe SIL2 Approved Pressure Sensor
• DMD331 Compact Differential Liquid Pressure Sensor

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User Guide

This tool will calculate the tolerance value, accuracy factor or pressure value for a pressure measurement device.

Use different pressure units to define the pressure measurement tolerance to avoid long decimals with too many leading zeros.

Define accuracy as a percentage value or a parts per million factor, plus a few other rarely used methods to express measurement accuracy.

Determine the largest pressure range that can be used to achieve a specific pressure measuring accuracy.

Formulas

The formulas used by this pressure measurement, accuracy and tolerance calculator to determine each individual parameter are:

Tol = P · Acc

Acc = Tol / P

P = Tol / Acc

Symbols

• Tol = Tolerance value in pressure units
• Acc = Accuracy as a proportion of a pressure value
• P = Pressure value

Pressure

This is the pressure value used to derive the accuracy or tolerance. The pressure value used is often the pressure range of a pressure measurement device, since typically the accuracy is a fixed value across the whole range.  For pressure calibration equipment the accuracy is sometimes defined as a percentage of reading, and in this case it would be a specific pressure reading that would be used to calculate the tolerance.

Accuracy

This is a proportion of the pressure range or reading that defines the margin of error in  measuring the true pressure value.

Tolerance

This is the amount of pressure that a reading may deviate from the true pressure value.

• Vacuum, Suction, Negative Pressure Gauges
• Data Logging Pressure Gauges
• Analog Output Pressure Gauges
• Pressure Indicator Transmitters

Request info on pressure gauge products for your application.