MEP calculations,
done right.
Fast, accurate engineering tools based on ASHRAE, SMACNA, IPC, and UPC standards.
ASHRAE Fundamentals
Calculations based on ASHRAE Handbook standards
SMACNA Standards
Duct construction per SMACNA guidelines
Built by MEP Engineers
Designed for real commercial design work
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No account required to get started
Engineering Tools
All calculations cite their source standard so you know exactly where the math comes from.
Duct Sizer
Size round, rectangular & flat oval ducts using the ASHRAE equal friction method. Includes velocity and pressure drop validation.
📖 ASHRAE Fundamentals
Pipe Sizer
Size hydronic piping by flow rate with system type, glycol mix, and temperature corrections per ASHRAE Chapter 22.
📖 ASHRAE Fundamentals
Domestic Water Pipe Sizer
Size domestic cold and hot water piping using fixture units, velocity limits, and pressure budget per IPC / UPC.
📖 IPC / UPC 2021
Water Service Sizer
Size building water service and meter from fixture counts per IPC / UPC and AWWA M22.
📖 IPC / UPC / AWWA M22
How are these calculations verified?
Every tool cites its source standard — ASHRAE, SMACNA, IPC, or UPC. Our methodology page documents the exact formulas, assumptions, and validation examples used in each tool.