# How many yards of concrete do i need for 100 square feet

How many yards of concrete do i need for 100 square feet | how much concrete do i need for 100 square feet.

Concrete ready mix made of blended mix of Portland cement, sand gravel and other approved ingredient. Generally, dry ready mix concrete are available in different bag size and weight condition like 40lb bag, 50lb, 60lb bag, 80lb bag 90lb bag. Standard thickness of slab would be 4 inches thick, others 3″, 5″, or 6″ thickness also be used.

You can also prepared concrete mix by manually by mixing of Portland cement, sand and gravel with water in 1:2:3 mix ratio (1 part of cement mix with 2 parts of sand and 3 parts of stone or gravel).

Weight of solid slab of concrete is about 150 lbs per cubic foot, or 4050 lbs per cubic yard, or 2136 kg per cubic meter. The weight of concrete is determined by its density, which can vary based on the amount of aggregate, water, and air in the mix.

In United States, based on Imperial measurement system, 1 cubic yard is unit of measurement of volume represented by 3 feet long by 3 feet wide by 3 feet depth (3’×3’×3′ = 27 cubic feet), so 1 cubic yard is equal to 27 cubic feet.

How many yards of concrete do I need for 100 sq ft slab vary depending on the type of concrete mix you choose for your project and thickness of slab. A typical effective concrete slab will at least have a 4″ thickness and 5″ -6″ is apply in certain conditions. In this article we know about how many cubic yards of concrete do i need for 100 square feet.

To figure out how many yards of concrete do i need, multiply the Length in Feet x Width in feet x depth in feet (inches divide by 12 to convert to feet) then divide by 27 to get cubic yardage. Approximate compaction factor 25% – multiply by 1.25 to get total yardage.

Essentially you are solving for volume and then converting to cubic yards. For concrete, the formula for volume is as follows: length x width x thickness.

## How to calculate concrete for 100 square feet

To calculate yards of concrete do you need for 100 square feet, lets do the following proceed:-

● 1) Determine how thick you want the concrete

● 2)/Measure the length and width that you’d like to cover

● 3) Multiply the length by the width to determine square footage

● 4) Convert the thickness from inches to feet

● 5) Multiply the thickness in feet by the square footage to determine cubic feet

● 6) Convert cubic feet to cubic yards by multiplying by 0.037

Here’s what the math looks like Yards of concrete do i need for 100 square feet (10’ by 10’ concrete patio):-

●1) 10 x 10 = 100 square feet
●2) 4 ÷ 12 = 0.33
●3) 100 x 0.33 = 33 cubic feet
●4) 33 x 0.037 = 1.22 cubic yards
●5) 25% compaction factors, 1.22 ×1.25 = 1.525 yards

### How many yards of concrete do i need for 100 square feet

You might need total 1.525 cubic yards of concrete for 100 square feet at 4″ thick, 0.768 yards at 2″ thick, 1.157 yards at 3 inches thick, and 1.93 cubic yards at 5 inches thick.

### How many yards of concrete do i need for 200 square feet

You might need total 3 cubic yards of concrete for 200 square feet at 4″ thick. Maths calculation: 1) Thickness = 4÷12 = 0.33′, 2) Volume = 200 × 0.33 = 66 cubic feet, 3) Yards of concrete = 66× 0.037 = 2.44 yards, 4) compaction factors 25%, so, total yards of concrete = 2.44 × 1.25 = 3 cubic yards.

### How many yards of concrete do i need for 400 square feet

You might need total 6 cubic yards of concrete for 400 square feet at 4″ thick. Maths calculation: 1) Thickness = 4÷12 = 0.33′, 2) Volume = 400 × 0.33 = 132 cubic feet, 3) Yards of concrete = 132× 0.037 = 4.88 yards, 4) compaction factors 25%, so, total yards of concrete = 4.88 × 1.25 = 6 cubic yards.

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◆ How much is a yard of concrete

### How many yards of concrete do i need for 500 square feet

You might need total 6 cubic yards of concrete for 400 square feet at 4″ thick. Maths calculation: 1) Thickness = 4÷12 = 0.33′, 2) Volume = 500 × 0.33 = 165 cubic feet, 3) Yards of concrete = 165× 0.037 = 6.11 yards, 4) compaction factors 25%, so, total yards of concrete = 6.11 × 1.25 = 7.64 cubic yards.

Conclusion:

You might need total 1.525 cubic yards of concrete for 100 square feet at 4″ thick, 0.768 yards at 2″ thick, 1.157 yards at 3 inches thick, and 1.93 cubic yards at 5 inches thick.