Calculations
Engineering
calculations.
Fluid flow, heat transfer, reaction engineering, thermodynamics, separations, control and propulsion — each calculator with the theory behind it and the source of every equation, cited in the text. Everything runs in your browser and updates as you type.
Mechanical & sealing
O-Ring Calculator
Piston, rod and face seals with ISO 286 fits, ISO 3601 tolerances and standard size tables.
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calculators
These tools are for quick engineering estimates. Verify critical designs against the relevant standards and vendor data. All cited books, Ullmann articles, papers and standards are collected on the Sources page.