Construction & DIY
Engineering ToolBox
Free tables, formulas and calculators for building, plumbing, electrical and materials.
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- Added
- Nov 3, 2026
- Source
- engineeringtoolbox.com
Engineering ToolBox is a huge free reference for technical numbers: pipe sizes, wire sizes, material weights, concrete mixes and much more. It's handy when you need a quick figure on site.
What you can do with it
- Look up pipe and wire sizing tables
- Find material weights and properties
- Use calculators for flow, loads and conversions
Good to know
Use it for reference and learning. Structural work should still be designed by an engineer.