OnSiteCalc
your quick no nonsense on-site unit converter
Category
ALL
Pressure
Energy
Power
Length / Distance
Area
Volume / Capacity
Diameter / Thickness
Mass / Weight
Density / Material Weight
Flow
From unit
PSI
(pressure)
PSIA
(pressure)
psf
(pressure)
Pa
(pressure)
kPa
(pressure)
bar
(pressure)
atm
(pressure)
Torr
(pressure)
mmHg
(pressure)
inHg
(pressure)
ft of head
(pressure)
inH2O
(pressure)
mmH2O
(pressure)
kgf/cm²
(pressure)
at
(pressure)
Barye (Ba)
(pressure)
J
(energy)
cal
(energy)
kcal
(energy)
ft·lb
(energy)
eV
(energy)
Wh
(energy)
kWh
(energy)
Therm
(energy)
W
(power)
kW
(power)
MW
(power)
hp
(power)
BTU/hr
(power)
ft·lb/s
(power)
m
(length)
mm
(length)
cm
(length)
in
(length)
ft
(length)
yd
(length)
km
(length)
mi
(length)
mm
(diameter)
in
(diameter)
ft
(diameter)
m
(diameter)
m²
(area)
ft²
(area)
in²
(area)
yd²
(area)
acre
(area)
hectare
(area)
Square (100 ft²)
(area)
m³
(volume)
ft³
(volume)
in³
(volume)
yd³
(volume)
L
(volume)
mL
(volume)
gal (US)
(volume)
qt (US)
(volume)
pt (US)
(volume)
Board Foot (BF)
(volume)
acre-ft
(volume)
kg
(mass)
g
(mass)
lb
(mass)
oz
(mass)
ton (US)
(mass)
kg/m³
(density)
lb/ft³
(density)
lb/in³
(density)
g/cm³
(density)
lb/gal (US)
(density)
m3/s
(flow)
m3/h
(flow)
L/s
(flow)
L/min
(flow)
L/h
(flow)
ft3/s
(flow)
ft3/min
(flow)
ft3/h
(flow)
gal (US)/s
(flow)
gal (US)/min
(flow)
gal (US)/h
(flow)
CFM
(flow)
CFS
(flow)
About This Tool
OnSiteCalc is built for field professionals who need quick unit conversions. Learn more about how pressure, head, and BTU relate, and why these conversions matter in plumbing and HVAC work.
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