Construction Calculators

Project math for the job site and the weekend warrior — concrete volumes, bag counts, and material estimates, with every formula shown so you always know why.

Construction

Roof pitch chart

Pitch to angle, slope, rafter factor — printable chart.

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Wire gauge chart

Every AWG size 40 to 4/0: diameter, area, resistance.

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Concrete tube

Bags and yards for round tubes, piers, and footings.

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Ramp vs porch lift

Side-by-side cost and space comparison for any rise.

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Ramp slope calculator

Size an ADA ramp: run length, grade, and the 1:12 table.

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Concrete

Cubic yards and 60/80-lb bag counts for slabs and tubes.

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Inches to fraction

Decimal inches to the nearest 16th, 32nd, or 64th — plus full lookup charts.

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