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Select slab shape below and enter side lengths, slab thickness, edge foundation and internal foundation thickening dimensions (if applicable). Hit 'Calculate' to display results. Hit for a step by step walk through demo to see how the calculator works.

Select Shape Below
Rectangular concrete slab L shaped concrete slab U shaped concrete slab T shaped concrete slab H shaped concrete slab



Input in Inches
Slab Thick
Edge Foundation Width
Edge Foundation Thick
Internal Foundation Length
Internal Foundation Width
Internal Foundation Thick
Splay Foundation Edge
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Concrete Calculator


Concrete Slab Calculator




Pre-Mix Concrete Bag Calculator
ft³ = approx:  60 lb Bags or  80 lb Bags of Premix Concrete

= approx:


Cylindrical Concrete Column Calculator Cylindrical column concrete calculator
cylindrical columns with diameter inches and length inches have a volume of


To use the calculator, select slab shape to display side length input boxes. Enter side lengths, foundation dimensions,
concrete depth, total internal foundation depth, length etc (in inches) to calculate cubic yards needed.
Hit 'Demo' button to automatically pre-fill side lengths, foundation dimensions etc and calculate.
Check 'Splay Foundation Edge' to splay internal foundation edges at 45° (see drawing)


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Free Android Apps
Pitch ~ Angle Measure + Convert
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8" Block Vertical Rebar Placement
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RunTalk Android App

Speaks Running Measurements while you mark them out.
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Greg Tarrant
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Questions or Suggestions? ph: +61 7 40987645

ALWAYS CHECK WITH YOUR LOCAL BUILDING AUTHORITY BEFORE LAYING OUT OR BUILDING ANYTHING
AND FOLLOW ALL LOCAL CODES. VERIFY ALL DIMENSIONS AND ANGLES BEFORE CONSTRUCTION

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