How Much Concrete for 200 Feet of Footing?
How much concrete for 200 feet of footing depends on the footing’s width and depth. A common residential footing 16 inches wide by 8 inches deep works out to about 6.58 cubic yards over 200 feet, before waste.
Concrete calculator →Footing math
- Cross-section: 16 in × 8 in = 1.333 ft × 0.667 ft = 0.889 sq ft.
- Volume: 0.889 × 200 ft = 177.8 cu ft.
- Yards: ÷ 27 = 6.58 yd³.
Related: How Much Concrete for 100 Feet of Footing?
Yards for common footing sizes over 200 feet
| Footing (width × depth) | Cubic feet | Cubic yards | Yards +10% |
|---|---|---|---|
| 12 × 6 in | 100.0 | 3.70 | 4.07 |
| 16 × 8 in | 177.8 | 6.58 | 7.24 |
| 20 × 8 in | 222.2 | 8.23 | 9.05 |
| 24 × 10 in | 333.3 | 12.35 | 13.58 |
| 24 × 12 in | 400.0 | 14.81 | 16.30 |
How big the footing should be
Footing size comes from the load, the soil and local code. A frequently used rule of thumb is a footing about twice as wide as the wall it supports and at least as deep as the wall is thick, but your building department sets the real minimum. The bottom must sit below the local frost line. See footing depth and the frost line.
Related: How Much Concrete for 20 Feet of Footing?
Trench pours run over
When the footing is poured straight into a dug trench instead of forms, the sides wander and the bottom is rarely flat. Measure the actual trench at several points and add 10 to 15 percent, not the usual 5.
Rebar and inspection
Footing steel is usually two or more horizontal bars held up off the soil. Book the inspection first, then the concrete: a failed inspection with a truck on the way is an expensive afternoon.
Questions people ask
How many yards for 200 feet of 16x8 footing?
About 6.58 cubic yards before waste.
How many yards for 200 feet of 24x12 footing?
About 14.81 cubic yards.
How much extra should I order for a trench footing?
About 10 to 15 percent, since trench walls are rarely straight.
How deep should a footing be?
Below the local frost line and on undisturbed soil; your building department sets the minimum.
How thick should the base under the slab be?
About 4 inches of compacted gravel is common for residential slabs, more on soft or poorly drained soil.
Related guides
- How Much Concrete for a Retaining Wall Footing?
- Footing Depth and the Frost Line: How Deep to Dig
- How Much Concrete for a Deck Footing? Bags per Hole
- How Much Area Does a Yard of Concrete Cover?
- How Many Bags of Concrete in a Yard? 40, 60, 80 lb
- Gravel Base Under a Concrete Slab: Depth and Tons
- How Many Yards in a Concrete Truck? Mixer Sizes
- Concrete Short Load Fee: What It Is and How to Cut It
- 60 lb vs 80 lb Concrete Bags: Yield, Count, and Cost
- Rebar vs Wire Mesh in a Slab: Which One to Use
- How Much Concrete for 120 Feet of Footing?
- How Much Concrete for 150 Feet of Footing?
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