Unit conversion
The following factors can be used to convert from English to the most common SI Metric values.
Table 186: SI Metric conversion
Measurement
Multiply English unit
By factor
To obtain Metric unit
Capacity
Tons refrigerant effect (ton)
3.516
Kilowatts (kW)
Power
Horsepower
0.7457
Kilowatts (kW)
Flow rate
Gallons / Minute (gpm)
0.0631
Liters / Second (l/s)
Feet (ft)
0.3048
Meters (m)
Length
Inches (in.)
25.4
Millimeters (mm)
Weight
Pounds (lbs)
0.4536
Kilograms (kg)
Velocity
Feet / Second (fps)
0.3048
Meters / Second (m/s)
Feet of water (ft)
2.989
Kilopascals (kPa)
Pressure drop
Pounds / Square Inch (psi)
6.895
Kilopascals (kPa)
Temperature
To convert degrees Fahrenheit (°F) to degrees Celsius (°C), subtract 32° and multiply by 5/9 or
0.5556.
Example: (45.0°F - 32°) x 0.5556 = 7.22°C
To convert a temperature range (i.e., a range of 10°F) from Fahrenheit to Celsius, multiply by 5/9 or
0.5556.
Example: 10.0°F range x 0.5556 = 5.6 °C range
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