Common Conversions
In Australia with our multi cultural society and International outlook it is common to have pump applications expressed in several formats rather than the supposedly standard litres per minute and pressure in bar or metres head. To help address this we hope the following common conversions will be of some assistance.
Volume
UK (Imperial) Gallons multiplied by
US Gallons multiplied by
Litres multiplied by
4.542 = litres 1.2 = US Gallons
3.7854 = Litres 0.8333 = UK gallons 231 = Cubic inches 0.1336 = Cubic feet
0.2642 = US Gallons 0.2202 = UK gallons 61.024 = Cubic inches 0.0353 = Cubic feet
277.2 = Cubic Inches 0.1597 = Cubic feet
Pressure
UK (Imperial) Gallons multiplied by
US Gallons multiplied by
Bar (at sea level) multiplied by
14.223 = Pounds per sq’ inch (psi) 0.9807 = Bar 98.07 = Kilopascals (kPa) 0.9678 = Atmosphere
0.06895 = Bar 6.895 = Kilopascals (kPa) 0.06805 = Atmosphere 0.070307 = kilograms / sq cm 2.309 = foot water column (pump head ft) 0.7038 = metres water column (pump head m)
14.504 = Pounds per sq’ inch (psi) 100 = Kilopascals (kPa) 0.98692 = Atmosphere 1.02 = kilograms / sq cm 33.6 = foot water column (pump head ft) 10.24 = metres water column (pump head m)
32.84 = foot water column (pump head ft) 10.00 = metres water column (pump head m)
Linear
Area
inches (in.)
x 25.4
= = = = = =
millimetres (mm) millimetres (mm)
square inches square feet square yards
x 6.4516
= = = = = =
square centimetres
feet (ft) feet (ft)
x 304.8 x 0.3048 x 0.9144 x 1,609.3 x 1.0693
x 0.092903
square metres
metres (m) metres (m) metres (m)
x 0.8361
square metres1.02
yards (yd) miles (mi) miles (mi)
acres acres
x 0.004047
square kilograms10.24
x 0.4047
hectares
kilometres (k)
square miles
x 2.59
square kilometres
PLEASE NOTE :
Other
The above conversions should be used as a guide only due to necessary “rounding”.
Horsepower (hp)
x 0.746 x 158.99
= =
kilowatts (kW)
Barrel oil
litres (l)
Other Conversions
Weights and Volumes
Torque
Length Calculations
Gal. Gal.
x x x x
3.785
= = = =
Liters
= = =
.Ft./lb. .NM Ft./lb
x
1.35 1.35
.001 in.
x x x =
25.4 25.4
= = =
Microns
NM
128
Ft./lb. In./lb.
/
In.
MM
Ounces Gal. Pounds Ltr. Gal. Ounces Ltr. Gallons Ltr. Cm ML (CC) Ounces Gram Ltr. Ounces PSI In. HG In. H 2 O Bar
x
12
MM
.03937
Inches
231
Cu. In.
Belt Length
2 x CD+D+d x 1.57
Temperatures
8.3453
Nozzles GPM
4000 PSI PSI 4000
Nozzle #
=
= =
.555(°F-32)
°C °F
(1.8*°C)+32 Required Horsepower
x x
61.02 33.82
= =
Cu. In.
GPM
=
Nozzle #
2
GPM Nozzle #
PSI
=
4000 x
GPM x PSI 1460 GPM x PSI 1714 GPM x PSI 1100
x
.2642
=
=
Elec. Brake HP
Pulley Ratio
x
1000
=
Cubic
Motor Pulley OD Pump RPM
Pump RPM Motor Pulley OD
=
Hydraulic HP
=
x
.0338
=
=
Gasoline HP
x
.03527
=
x x x x
.0680 14.5 .4912 .8226
= = = =
bar PSI PSI
In. HG
1030
B.A.R. Group Pty Ltd - Price List 18th September 2026
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