Dead Weight Tester Pressure & Area to Mass Calculator

Dead Weight Tester Parameters
Pressure (P) [?]
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
Effective Area (A) [?]
Select area unit sq millimetres (mm²) sq centimetres (cm²) sq inches (in²)
Local Gravity (ms-2) [?]
Calculate Mass Required
Mass (m) [?]
Select mass unit micrograms (µg or mcg) milligrams (mg) grams (g) ounces (oz) pounds (lb) kilograms (kg)

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User Guide

This online tool will calculate the required mass to be added to a dead weight tester pressure calibrator by entering the target pressure, the effective area of the piston-cylinder and the local gravity.

Formula

The formula used by this calculator to determine the required mass to be added to the dead weight tester is:

F = P·A

F = m·g

m = F/g

m = P·A/g

Symbols

• P = Pressure
• F = Force
• A = Area
• m = Mass
• g = Acceleration due to gravity

Target Pressure (P)

Enter the target pressure required by the dead weight tester for calibration purposes.

Effective Area (A)

Enter the effective area which you should find in the manufacturer’s documentation or instrument labelling.

Local Gravity (g)

Enter the acceleration due to gravity for your geographical location in metres per second per second (ms^-2). The local gravity is dependent on several factors such as latitude, height above sea-level, local geological density, etc… Refer to your national geological survey data for your location or use this local gravity calculator to determine a close approximation. The default value is set to 9.80665 ms^-2 which is standard gravity.

Required Mass (m)

This is the total mass of weights that need to be added to a dead weight tester with the specified effective area & local gravity to generate the target pressure .