Cubic Yards Calculator
Use this tool to estimate material volume for concrete, mulch, gravel, topsoil, sand, and more.
How to use this cubic yard calculator
When you buy bulk material, suppliers usually sell by cubic yard. This calculator helps you convert your project dimensions into an easy order quantity. Enter your length, width, and depth, choose your unit (feet, inches, yards, or meters), and click calculate.
You will get:
- Total volume in cubic yards
- Total volume in cubic feet
- An adjusted estimate including waste factor
- A rounded order recommendation (optional)
What is a cubic yard?
A cubic yard is a unit of volume equal to a cube that is 1 yard long, 1 yard wide, and 1 yard high.
1 cubic yard = 46,656 cubic inches
If you know your volume in cubic feet, divide by 27 to get cubic yards.
Standard formula
For rectangular areas (the most common case), use:
Example in feet
Suppose a bed is 18 ft long, 10 ft wide, and 0.5 ft deep:
- Volume in cubic feet = 18 × 10 × 0.5 = 90 ft³
- Volume in cubic yards = 90 ÷ 27 = 3.33 yd³
With a 10% waste factor, recommended order is about 3.67 yd³, which is usually rounded up to 3.75 yd³.
Common projects that use cubic yard estimates
- Concrete slabs: driveways, sidewalks, patios, shed pads
- Mulch: flower beds and landscape borders
- Gravel: drainage areas, paths, base layers, parking spots
- Topsoil: lawn repair, grading, raised planting zones
- Sand: paver base and leveling layers
Tips for better accuracy
1) Measure depth carefully
Depth errors have a huge effect on total volume. A small change from 3 inches to 4 inches can increase material needs by 33%.
2) Include a waste factor
Material compaction, uneven surfaces, and spillage all increase real-world usage. A 5%–15% buffer is common.
3) Split irregular areas into rectangles
If your area is not a perfect rectangle, break it into smaller sections, calculate each one, and add the results.
4) Confirm supplier delivery increments
Many yards deliver in quarter-yard or half-yard increments. Rounding up avoids running short mid-project.
Quick conversion reminders
- Inches to feet: divide by 12
- Feet to yards: divide by 3
- Cubic feet to cubic yards: divide by 27
- Meters to yards: multiply by 1.09361
Frequently asked questions
How many bags of concrete are in a cubic yard?
It depends on bag size and yield. As a rough guide, one cubic yard is about 27 cubic feet of material. Check the bag label for yield and divide accordingly.
Should I always round up?
Yes, in most cases. It is usually safer and cheaper than stopping work and paying for a second small delivery.
Can I use this for mulch and gravel?
Absolutely. The same volume math applies. Just make sure the depth you enter matches your target layer thickness.
Final thought
A good cubic yard estimate saves time, money, and stress. Use the calculator above before ordering any bulk material, and you will be much more likely to get the right amount on the first delivery.