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Both calculators run independently — change the inputs on either side to compare results.

Vapor Pressure Calculator (Antoine Equation)

Calculate the vapor pressure of common chemicals at a given temperature using the Antoine equation and built-in constants for water, benzene, toluene, and ethanol. Essential for distillation design, safety assessments, and environmental modeling.

Temperature (°C)

Compound

Custom Antoine A

Custom Antoine B

Custom Antoine C

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Chemical Engineering

Centrifugal Pump Sizing and NPSH Calculator

Size centrifugal pumps by calculating shaft power and net positive suction head (NPSH). Use this when selecting a pump for water supply, chemical transfer, or HVAC systems.

Flow Rate (m³/h)

Total Dynamic Head (m)

Fluid Density (kg/m³)

Pump Efficiency (%)

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Key differences

	Vapor Pressure Calculator (Antoine Equation)	Centrifugal Pump Sizing and NPSH Calculator
Category	Chemical Engineering	Chemical Engineering
Inputs required	5	4
Result	Vapor Pressure (mmHg)	Required Power (kW)
What it does	Calculate the vapor pressure of common chemicals at a given temperature using the Antoine equation and built-in constants for water, benzene, toluene, and ethanol. Essential for distillation design, safety assessments, and environmental modeling.	Size centrifugal pumps by calculating shaft power and net positive suction head (NPSH). Use this when selecting a pump for water supply, chemical transfer, or HVAC systems.