Tested
Door Rough Opening Calculator
Framing opening size for a door from its slab size.
Construction Calculators
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Free construction calculators for everyday questions, from quick checks to detailed breakdowns.
Construction tools (73)
- Tested
Drywall Calculator
Sheets of drywall for walls after deducting openings.
Construction Calculators
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Excavation Volume Calculator
Soil volume to dig for a pit, trench or foundation, with an optional swell factor.
Construction Calculators
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Fence Calculator
Posts, rails and pickets for a straight fence run.
Construction Calculators
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Fence Stain Calculator
Gallons of stain for both sides of a fence.
Construction Calculators
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Flooring Calculator
Flooring area with waste.
Construction Calculators
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Glass Weight Calculator
Weight of a glass pane from its dimensions.
Construction Calculators
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Gold Weight Calculator
Mass of pure gold from its volume.
Construction Calculators
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Grass Seed Calculator
Pounds of seed for a lawn at your seeding rate.
Construction Calculators
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Gravel Calculator
Cubic yards of gravel for an area.
Construction Calculators
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Gravel Volume Calculator
Cubic yards (and tons, if you know the material weight) of gravel, sand, soil or mulch to fill an area.
Construction Calculators
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Gutter Length Calculator
Total gutter length and number of sections from your eave lengths.
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.