Convert for Windows

Convert is a free and easy to use unit conversion program that will convert the most popular units of distance, temperature, volume, time, speed, mass, power, density, pressure, energy and many others, including the ability to create custom conversions!

Operating Systems

Convert runs on the following operating systems:

» Download Convert for Windows



Fluid Power Formulas

Pressure   Mechanical Horsepower
P = pressure (PSI)
F = force (lb.)
A = area (in²)

HP = mechanical horsepower
d = distance (ft.)
F = foce (lb.)
t = time (seconds)

Volume (cylinder) Mechanical Horsepower
V = volume (in³)
A = area (in²) [note: either Ap or Ae]
HP = mechanical horsepower
F = force (lb.)
V = velocity
Piston Area (cylinder) Hydraulic Horsepower

Ap = piston area
Dp = piston diameter

HP = hydraulic horsepower
Q = flow (gpm)
P = pressure (PSI)
Rod Area (cylinder) Motor Horsepower
Ar = rod area
Dr = rod diameter
HP = motor horsepower
S = speed (rpm)
T = torque (lb.-in.)
Effective Area Heat
Ae = effective area
Ap = piston area
Ar = rod area
H = heat (Btu/hour)
HP = hydraulic horsepower
Piston Rod Speed (cylinder) Flow (SCFM)
V = velocity
Q = flow (gpm)
A = area (in²)
Q = flow (ft³/min.)
V = cylinder volume (in³)
CR = compression ratio
t = stroke time (seconds)
Flow (cylinder) Compression Ratio
Q = flow (gpm)
n = rod speed (in/min)
A = area (in²) [note: either Ap or Ae]
CR = compression ratio
Pg = gauge pressure (PSIG)
Pa = atmospheric pressure (PSIA)
Pipe Flow Air Motor Speed
V = velocity
GPM = gallons per minute
A = area (in²)
RPM = air motor speed
Q = flow (cfm)
Disp = motor displacement (in³/rev)
Pressure Drop in Pipes Pneumatic Cylinder Rod Speed
GPM = gallons per minute
V = viscosity (SSU)
D = diameter
V = cylinder rod speed (in./min.)
S = stroke (in.)
t = stroke time (seconds)
Torque Hydraulic Tank Cooling
T = torque (lb.-in.)
F = force (lb.)
d = distance (in.)
HP = horsepower
Aw = wetted area (ft²)
T = oil temp - ambient air temp.
Motor Torque Flow Coefficient (Cv)
T = motor torque (lb.-in.)
P = pressure (PSI)
Disp = motor displacement (in³/rev)
Cv = flow coefficient
Q = SCFM
G = specific gravity of flow medium (G = 1 for air)
Tabs = absolute temp (460+°F)
P = pressure drop (PSI) static to static pressure
Po = outlet pressure = inlet press - P
Pa = atmospheric pressure
Motor Shaft Speed
RPM = motor shaft speed (rpm)
Q = flow (gpm)
Disp = motor displacement (in³/rev)
Work (ft.-lb.)
W = work (ft.-lb.)
d = distance (ft.)
F = force (lb.)
Power (ft.-lb./sec)
d = distance (ft.)
F = force (lb.)
t = time (seconds)