Calculators - Estimators - Template Generators - Plans & Tools
Weights ~ Sizes
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Concrete Volume Calculator
To use this calculator, first draw the shape of your concrete slab:
Click the green 'Demo' button to see how it works.
Left click in diagram, hold button down and drag to measure dimensions and area at full scale.
Enter Max Length and Max Width of slab. (Add ~2000 to Length and Width to keep diagram in from edges)
Enter Start Top and Start Left, for starting point of diagram (the green dot in grid)
Clear + Start
and enter Side Length of first side to draw and hit appropriate direction (Arrow) button to draw first side. You can also use
→ keyboard keys instead of arrow buttons. The
key = Undo Last.
Repeat and continue to draw complete (closed) slab shape.
DO NOT overlap sides.
When shape is complete, it will fill solid color. Enter Slab Thick, edge and internal thickenings if required, then click
Clear Textbox Each Entry
DO NOT overlap (cross) sides.
Internal Thickening Length
Edge Beam Width
Internal Thickening Width
Edge Beam Thick
Internal Thickening Thick
Splay Internal Edges 45°
To enter Side Lengths and draw diagram, enter length and use
→ to draw the side. Hit
to remove the last entered side, and
to close the diagram. You can enter multiple length sides in same direction, but cannot go back (against) the previous direction, cross or intersect any other side.
The current distance (X and Y) to start point is displayed below the Side Length entry. Draw a side at 1 of the lengths displayed to get back to a point horizontally or vertically so you can close the diagram. If the last drawn side end is in line with the start point (not diagonal), hit 'Close Diagram' to auto add the last side and close the diagram. Clicking the X or Y entry will enter its length into the Side Length box. You can then hit the Close Diagram button, or the
key to close the diagram.
Check 'Splay Internal Edges' to splay internal footing edges at 45° (see drawing).
- All Areas
To fine tune Slider Controls click to select and use
(cursor) keyboard keys.
Open new window containing only diagram images in current page ↓ This will better fit printed page.
Printing to Scale Help
Your iPad, iPhone or Android Tablet or Phone is a valuable On-Site tool!
Lay your phone or tablet on an angled surface (roof ?) to directly measure angles and automatically calculate
Pitch Angle Apps
If you've benefited from this free service, please consider a small donation to
Blue Dragon Children's Foundation
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Calculator How To Videos
Greg Tarrant - ph: (Australia) +61 7 40987645 - mob: 0438 165 753
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Questions or Suggestions? ph: +61 7 40987645
ALWAYS CHECK WITH YOUR LOCAL BUILDING AUTHORITY BEFORE LAYING OUT OR BUILDING
AND FOLLOW ALL LOCAL CODES. VERIFY ALL DIMENSIONS AND ANGLES BEFORE CONSTRUCTION
Copyright © Greg Tarrant