Tested
Pool Volume Calculator
Gallons of water in a rectangular, round or oval pool.
Construction Calculators
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Free construction calculators for everyday questions, from quick checks to detailed breakdowns.
Construction tools (73)
- Tested
Post Hole Concrete Calculator
Concrete per post hole after the post's volume.
Construction Calculators
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Rafter Length Calculator
Common rafter length from run and pitch.
Construction Calculators
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Rebar Quantity Calculator
Bars and total length of rebar in a grid across a slab.
Construction Calculators
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Rebar Weight Calculator
Weight of reinforcing bar by size and length.
Construction Calculators
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Retaining Wall Calculator
Blocks for a segmental retaining wall.
Construction Calculators
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Roof Area Calculator
Roof surface area from the building footprint, overhang and pitch.
Construction Calculators
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Roof Pitch Calculator
Roof pitch as rise per 12 inches, angle, slope percent and rafter length factor.
Construction Calculators
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Roof Sheathing Calculator
Sheets of plywood or OSB for a roof area.
Construction Calculators
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Roof Shingles Calculator
Squares and bundles of shingles for a roof area.
Construction Calculators
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Roofing Calculator
Roof area and shingles.
Construction Calculators
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Sand Calculator
Cubic yards of sand for an area.
Construction Calculators
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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.