JOHNSON CONTROLS
35
Form 160.78-N1
Issue date: 2/02/2022
35
The following factors can be used to convert from
English to the most common SI Metric values.
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
Table 5 -
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)
Length
Feet (ft)
0.3048
Meters (m)
Inches (in.)
25.4
Millimeters (mm)
Weight
Pounds (lb)
0.4536
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)