Bernoulli's equation calculator

Basic fluid dynamics

online since 2015

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Calculation setup
Conditions at position one
Dimensions at one
Flow rates
Conditions at position two
Dimensions at two
Fluid properties

Calculator description

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Also, read about calculation procedures, what you have to know for the calculations and what limitations apply.

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Issues and answers

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issues and answers

Description

p1 – pressure in position one
Static pressure of fluid in the point in which flow parameters are known – referent position
p2 – pressure in position two
Static pressure of fluid in the point in which flow parameters should be calculated
D1 - diameter in position one
Internal pipe or stream diameter in the point in which flow parameters are known
D2 - diameter in position two
Internal pipe or stream diameter in the point in which flow parameters should be calculated
V1 - velocity in position one
Flow velocity where flow diameter is D1 and where flow parameters are known
V2 - velocity in position two
Flow velocity where flow diameter is D2 and where flow parameters should be calculated
z1 – height in position one
Height or elevation of the fluid stream in the point in which flow parameters are known
z2 – height in position two
Height or elevation of the fluid stream in the point in which flow parameters should be calculated
q - volumetric flow rate
Fluid flow rate in terms of units of volume per unit of time. Considered to be constant
ṁ - mass flow rate
Fluid flow rate in terms of units of mass per unit of time. Considered to be constant
ρ - fluid inlet density
Density of fluid in terms of mass per unit of volume. Considered to be constant
p1 - pressure drop
Pressure difference between two points of stream line

Calculation setup

Select value to calculate. You should enter not selected one.
p2
calculate pressure in position two
z2
calculate height in position two
v2
calculate velocity in position two
Available only if "use flow rate q in the calculation" is selected. You should enter values for not selected one.
v1
calculate velocity in position one
D1
calculate diameter in position one
q
calculate flow rate
Available only if v2 calculation is not selected. You should enter values for not selected one.
v2
calculate velocity in position two
D2
calculate diameter in position two

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