Building Trades

HVAC duct and load planning, pipe weights and recessed-light layouts, with transparent methods and design limits.

3 calculators live · Free to use

HVAC & Airflow

1 live

HVAC Duct Calculator

Check duct airflow, velocity and friction, then investigate equipment loads in a separate planning worksheet.

Building Trades

Electrical & Solar

1 live

Recessed Lighting Calculator

Plan recessed-light grids, fixture count, beam spacing and wall-wash rows from explicit room and product inputs.

Building Trades

Plumbing & Piping

1 live

Line Pipe Weight Calculator

Estimate bare pipe weight and fluid-filled operating weight from actual dimensions, material density and piece count.

Building Trades