Efficienco

About Efficienco

Efficienco is a free collection of calculators for contractors, builders and homeowners planning construction materials, home improvement projects and building-trade systems. Its tools cover areas such as building materials, concrete block, linear feet, bitumen paving, home addition costs and HVAC duct sizing.

The calculators use familiar units and show their assumptions, so users can see how a total was built and adjust inputs such as waste, openings or local rates. Results come with supporting values and breakdowns, and the site needs no account or paywall to use.

Efficienco also publishes practical guides that explain the formulas behind the tools, along with examples and edge cases. The site notes that professional or safety-critical decisions still need qualified review.