Energy Equation Calculator

Solve for:
	Fluid Mass Density, ρ (slug/ft³):
Select units:	Upstream Elevation, Z₁ (ft):
	Downstream Elevation, Z₂ (ft):
	Upstream Pressure, P₁ (lb/ft²):
www.LMNOeng.com	Downstream Pressure, P₂ (lb/ft²):
	Upstream Velocity, V₁ (ft/s):
© LMNO Engineering,	Downstream Velocity, V₂ (ft/s):
Research, and Software, Ltd.	Energy (Head) Loss, h_L (ft):

Units: ft=foot, kg=kilogram, lb=pound, m=meter, N=Newton, s=second.

Bernoulli (Energy) Equation for steady incompressible flow:

Mass density ρ can be found at mass density of liquids and gases.
g = acceleration due to gravity = 32.174 ft/s² = 9.806 m/s².

The steady state incompressible energy equation (also known as the Bernoulli equation) models a fluid moving from location 1 to location 2. The loss term h_L accounts for all minor (valves, elbows, etc.) and major (pipe friction) losses between 1 and 2. For Bernoulli applications, please see our Bernoulli Calculator with Applications.

The Bernoulli equation (energy equation) calculation does not check for unreasonable inputs such as negative density, negative velocity, or pressure less than a complete vacuum.

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