FORM 160.77-O2
ISSUE DATE: 11/15/2011
JOHNSON CONTROLS
127
SI METRIC CONVERSION
The following factors can be used to convert from
English to the most common SI Metric values.
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)
Length
Feet (ft) 304.8 Meters (m)
Inches (in) 25.4 Millimeters (mm)
Weight Pounds (lbs) 0.4538 Kilograms (kg)
Velocity Feet / Second (fps) 0.3048 Meters / Second (m/s)
Pressure Drop
Feet of Water (ft) 2.989 Kilopascals (kPa)
Pounds / Square Inch (psi) 6.895 Kilopascals (kPa)
TABLE 8 - SI METRIC CONVERSION
TEMPERATURE
To convert degrees Fahrenheit (°F) to degrees Celsius
(°C), subtract 32° and multiply by 5/9 or 0.5556.
Ex: (45.0°F - 32°) • 0.5556 = 27.2°C
To convert a temperature range (i.e., a range of 10°F)
from Fahrenheit to Celsius, multiply by 5/9 or 0.5556.
Ex: 10.0°F range • 0.5556 = 5.6 °C range
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