Engineering calculators
Verified MEP calculators that run in your browser: psychrometrics, airflow, fans and pumps, pipe sizing, electrical loads and voltage drop, hot water and storage tanks, cleanroom air changes, plus a unit converter. Every result shows its inputs and assumptions for engineer review.
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Results are preliminary checks for engineer review. They are not an engineering approval and do not replace a project calculation to the applicable codes, authority requirements and the client's specification.
MEP unit converter
Convert between SI and imperial units used on HVAC, plumbing and electrical drawings and data sheets: TR, kW and Btu/h, CFM and L/s, Pa and in.wg, duct friction rate, U-values, cable sizes and more.
The same value in every unit
Fast estimates with the working shown
Early-stage sizing for a first conversation: a cooling estimate from room dimensions, a duct sizer, a chilled-water pipe sizer, electrical power and current, and a unit converter.
Cooling estimate, duct and pipe sizers, electrical, units
Five quick tools with their assumptions and method notes on one page.
Open the quick tools → FULL CALCULATION PACKAGESHAP cooling loads, electrical schedules, plumbing and fire calculations
Project calculation packages prepared to the applicable codes and the client's specification, with coordinated drawings.
See our services →Need the full calculation package?
Send one drawing set, model or calculation package for a quick scope review. We work to your standards, templates and submission requirements.