Tested
Gutter Length Calculator
Total gutter length and number of sections from your eave lengths.
Construction Calculators
Use CalculatorConstruction Calculators
Free construction calculators for everyday questions, from quick checks to detailed breakdowns.
Construction tools (9)
- Tested
Ice and Water Shield Calculator
Rolls of ice and water membrane for an area.
Construction Calculators
Use Calculator - Tested
Metal Roofing Calculator
Number of metal roofing panels across a roof width.
Construction Calculators
Use Calculator - Tested
Rafter Length Calculator
Common rafter length from run and pitch.
Construction Calculators
Use Calculator - Tested
Roof Area Calculator
Roof surface area from the building footprint, overhang and pitch.
Construction Calculators
Use Calculator - Tested
Roof Pitch Calculator
Roof pitch as rise per 12 inches, angle, slope percent and rafter length factor.
Construction Calculators
Use Calculator - Tested
Roof Sheathing Calculator
Sheets of plywood or OSB for a roof area.
Construction Calculators
Use Calculator - Tested
Roof Shingles Calculator
Squares and bundles of shingles for a roof area.
Construction Calculators
Use Calculator - Tested
Roofing Calculator
Roof area and shingles.
Construction Calculators
Use Calculator
All construction calculators by topic (73)
Concrete
Earthwork
Estimating
Flooring
Insulation
Landscaping
Machining
Materials
Mechanical
Roofing
Volume
About construction calculators
Construction Calculators help you turn a question into a clear, checkable answer. Each tool lists its inputs, shows the formula it relies on and explains how to read the result.
Browse by topic using the filters, or search for a specific tool. Tools that are still being built are clearly marked as previews and are not presented as finished calculators.
Frequently asked questions
Are the construction calculators calculators free?
Yes. Every calculator on Calculator Atlas is free to use and requires no sign-up.
How are results verified?
A calculator is only published after its formula has been implemented, tested against independently computed reference values. It is an automated check, not a professional review.