Quick Answer: How Much Concrete For Footings?

How much concrete do I need for footings?


  1. Determine how thick you want the concrete.
  4. Convert the thickness from inches to feet.

How do you calculate foundation footings?

How to Calculate Footing Size


How do you calculate cubic meters for footings?


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How do you calculate volume in footing?

Example Footing Calculation

  1. Volume = H/3 (A1+A2+(√A1 x A2)
  2. A1 = 2 x 1.5 = 3 Sqm.
  3. A2 = 0.5 x 0.3 = 0.15 Sqm.
  4. H = 0.15m.
  5. Now Volume = 0.15/3 x (3+0.15+(√3 x 0.15)
  6. = 0.05 x (3.15+0.67)
  7. = 0.19 m3
  8. Volume (V) = 0.19 m3



How many 80lb bags of concrete makes a yard?

If you’re using 80lb bags of concrete, you’ll need 45 bags to make a yard.

What is the standard footing size?


How thick do footings need to be?

Depth of Footings


What is the minimum depth of footing?

minimum depth of foundation:– minimum depth of foundation is around 5 feet for a small residential building from ground level or at least 1.50 times the width of footing. In cold climates the depth of footing is Kept at a minimum of 1.50m below surface because of possible frost action.


Batching by volume – DIY

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Materials 0.2 m3 concrete 1 m3 concrete
cement (no. 25 kg bags) 2.5 12
all-in aggregate (volume in m3) 0.25 1.3
water (volume in litres) 32 160
cement (no. 25 kg bags) 3.5 14

How many bags of cement make 1m3 of concrete?

Thus, the quantity of cement required for 1 cubic meter of concrete = 0.98/0.1345 = 7.29 bags of cement. The quantities of materials for 1 m3 of concrete production can be calculated as follows: The weight of cement required = 7.29 x 50 = 364.5 kg. Weight of fine aggregate (sand) = 1.5 x 364.5 = 546.75 kg.

How many cubic meters is a 25kg bag of concrete?

Concrete is a mix, typically of 1 part cement to 4-5 aggregate, and a cubic metre of finished concrete weighs around 2.5 tonnes, so requires around 500kg cement or 20× 25kg bags. In direct answer, there is about 1/100th or 0.01 m3 in a 25kg bag.

What is the formula for trapezoidal footing?

Example – Calculation Using Trapezoidal Footing Formula

Let a= 0.8 m and b = 0.8m. Hence, A1= A x B = 1.5 x 1.5 = 2.25m. A2 = a x b = 0.8 x 0.8m =.

How do you find footings?


  1. Step 1: Check the depth and dimension.
  2. Step 2: Check the Reinforcing Bars Sizes, Spacing, and Grades.
  3. Step 3: Check the Credibility of the Formworks and Gridline Locations.

How do you find the area of a sloped footing?

For Square Footing

  1. Enter the dimension(A) for the lower square area.
  2. Enter the dimension (a) for the Upper square area.
  3. Enter the height of the trapezoid. Height (h) in metre.
  4. Area (A1)
  5. Area (A2)
  6. Square Root of A1*A2.
  7. Volume ( V )

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