Use this Concrete & Material Unit Converter to instantly convert between Square Feet, Cubic Yards, Cubic Feet, Bag Counts (80lb, 60lb, 50lb), and Weight in US Tons for ready-mix concrete, gravel base, mason sand, and topsoil. Calculate exact order volumes with customizable spillage and waste buffers.
Concrete & Material Unit Converter
Converted quantities & material list
| Conversion Unit | Calculated Value |
|---|---|
| Cubic Yards (Order Size) | - |
| Cubic Feet (Volume) | - |
| Total Weight in US Tons | - |
| Total Weight in Pounds (lbs) | - |
| Standard 80 lb Bags | - |
| Standard 60 lb Bags | - |
| Fast-Setting 50 lb Bags | - |
| Estimated Ready-Mix Truckloads | - |
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Square Feet to Cubic Yards Quick Conversion Chart
Find your project square footage on the left to see the exact cubic yardage required across standard slab thicknesses (including 10% waste buffer for grading variations):
| Slab Area (Sq Ft) | 3″ Thickness (Walkways) | 4″ Thickness (Patios / Slabs) | 5″ Thickness (Driveways) | 6″ Thickness (Garages / Heavy) | 8″ Thickness (Machinery) |
|---|---|---|---|---|---|
| 50 sq ft | 0.5 cu yd (23 bags) | 0.7 cu yd (31 bags) | 0.9 cu yd (39 bags) | 1.0 cu yd (45 bags) | 1.3 cu yd (60 bags) |
| 100 sq ft (10×10) | 1.0 cu yd (47 bags) | 1.4 cu yd (62 bags) | 1.7 cu yd (77 bags) | 2.0 cu yd (92 bags) | 2.7 cu yd (122 bags) |
| 200 sq ft (10×20) | 2.0 cu yd (92 bags) | 2.7 cu yd (122 bags) | 3.4 cu yd (153 bags) | 4.1 cu yd (185 bags) | 5.4 cu yd (245 bags) |
| 400 sq ft (20×20) | 4.1 cu yd (185 bags) | 5.5 cu yd (245 bags) | 6.8 cu yd (306 bags) | 8.2 cu yd (367 bags) | 10.9 cu yd (490 bags) |
| 600 sq ft (2-Car) | 6.1 cu yd (275 bags) | 8.2 cu yd (367 bags) | 10.2 cu yd (459 bags) | 12.2 cu yd (550 bags) | 16.3 cu yd (733 bags) |
| 800 sq ft (20×40) | 8.2 cu yd (367 bags) | 10.9 cu yd (490 bags) | 13.6 cu yd (612 bags) | 16.3 cu yd (733 bags) | 21.8 cu yd (980 bags) |
| 1,200 sq ft (30×40) | 12.2 cu yd (550 bags) | 16.3 cu yd (733 bags) | 20.4 cu yd (918 bags) | 24.4 cu yd (1,100 bags) | 32.6 cu yd (1,467 bags) |
Cubic Yards to Bag Counts & Pallet Requirements
If you are purchasing bagged concrete from Home Depot, Lowe’s, or local supply yards, use this conversion table to determine bag counts and full pallets (a standard pallet holds 42 bags of 80 lb or 56 bags of 60 lb mix):
| Volume (Cu Yds) | Volume (Cu Ft) | 80 lb Bags (0.60 cu ft) | 80 lb Pallets | 60 lb Bags (0.45 cu ft) | 50 lb Fast-Set (0.375 cu ft) |
|---|---|---|---|---|---|
| 0.5 cu yd | 13.5 cu ft | 23 bags | 0.5 pallet | 30 bags | 36 bags |
| 1.0 cu yd | 27.0 cu ft | 45 bags | 1.1 pallets | 60 bags | 72 bags |
| 2.0 cu yd | 54.0 cu ft | 90 bags | 2.1 pallets | 120 bags | 144 bags |
| 3.0 cu yd | 81.0 cu ft | 135 bags | 3.2 pallets | 180 bags | 216 bags |
| 5.0 cu yd | 135.0 cu ft | 225 bags | 5.4 pallets | 300 bags | 360 bags |
Material Density & Weight Conversion (Tons vs. Yards)
When purchasing gravel sub-base, crushed stone, mason sand, or topsoil, quarries and material yards sell by the US Ton (2,000 lbs) rather than cubic yards. Use these density factors to convert:
| Material Type | Lbs per Cu Foot | Lbs per Cubic Yard | Tons per Cubic Yard | Yards per 1 US Ton |
|---|---|---|---|---|
| Normal Concrete (Wet Ready-Mix) | 150 lbs | 4,050 lbs | 2.03 Tons | 0.49 cu yds |
| Crushed Stone / Road Base (3/4″ minus) | 104 lbs | 2,800 lbs | 1.40 Tons | 0.71 cu yds |
| Pea Gravel / River Rock | 100 lbs | 2,700 lbs | 1.35 Tons | 0.74 cu yds |
| Masonry / Concrete Sand (Dry) | 96 lbs | 2,600 lbs | 1.30 Tons | 0.77 cu yds |
| Screened Topsoil (Moist) | 81 lbs | 2,200 lbs | 1.10 Tons | 0.91 cu yds |
| Shredded Bark Mulch | 30 lbs | 800 lbs | 0.40 Tons | 2.50 cu yds |
Primary Conversion Formulas for Construction
- Square Feet to Cubic Yards:
Cubic Yards = Square Feet × (Thickness in Inches ÷ 12) ÷ 27 - Cubic Feet to Cubic Yards:
Cubic Yards = Cubic Feet ÷ 27 - Cubic Yards to 80 lb Bags:
80 lb Bags = Cubic Yards × 45 - Cubic Yards to 60 lb Bags:
60 lb Bags = Cubic Yards × 60 - Cubic Yards to Concrete Tons:
US Tons = Cubic Yards × 2.025 - Gravel Tons to Cubic Yards:
Cubic Yards = Tons ÷ 1.40(orTons × 0.714)
Frequently Asked Questions: Material & Concrete Conversions
How many square feet does 1 cubic yard of concrete cover?
At a standard 4-inch thickness, 1 cubic yard covers exactly 81 square feet before waste (or ~73.6 sq ft after reserving 10%). At 6 inches thick, 1 yard covers 54 square feet. At 3 inches thick, it covers 108 square feet.
How many 80 lb bags equal 1 cubic yard?
There are exactly 45 bags of 80 lb concrete in 1 cubic yard. Each 80-lb bag yields 0.60 cubic feet of mixed concrete.
How many tons of gravel are in a cubic yard?
One cubic yard of crushed gravel or 3/4″ road base weighs approximately 2,800 pounds, which equals 1.40 US Tons. To convert tons of gravel to yards, divide total tons by 1.4.
When should I order ready-mix concrete instead of buying bags?
If your project requires more than 2 to 3 cubic yards (over 90 to 135 bags of 80-lb concrete), ordering a ready-mix delivery truck is significantly cheaper, provides uniform factory strength, and avoids hours of exhausting manual hand-mixing.
Public References
- QUIKRETE Concrete Mix technical data sheet — bag yields used to cross-check the 50-, 60-, and 80-lb conversions.
- QUIKRETE concrete calculator — manufacturer calculator for slab and bag quantities.
Estimate transparency
How this estimate was prepared
- Prepared by
- GoHomeCost Cost Data Team
- Last reviewed
- August 24, 2026
- Update cycle
- Public price inputs checked monthly
Calculation method: Project quantity is multiplied by editable low, typical, and high unit rates. Selected location adjustments, waste, fixed charges, and minimum-job rules are then applied and shown in the result.
Public references used on this page:
This is a planning estimate, not a quote or structural specification. Check product yields, local code, site conditions, and written contractor bids before purchasing materials or building.
Read the full methodology Report a price or calculation issue