Tools you might need next
Calculate optimal seed spacing, plants per row, and rows per bed for vegetable garden planning and efficient seed placement.
Convert NPK fertilizer ratios and calculate precise application rates per square foot for lawns, gardens, and raised beds.
Calculate carbon-to-nitrogen ratio for compost piles using brown and green material weights to balance decomposition speed.
Multiply length, width, and depth in the same units. For feet and inches, convert depth to feet first.
volume (cu ft) = length (ft) × width (ft) × depth (ft)Bulk soil is often sold by the cubic yard. One cubic yard equals 27 cubic feet.
cubic yards = cubic feet / 27Fresh mix settles after watering. Many gardeners add 5% to 10% extra volume for topping off.
Updated: July 2026
Calculate total cubic yards to compare bulk delivery vs. bagged raised-bed mix from a garden center.
Enter a 3-inch refresh depth instead of full fill when renewing soil in existing frames.
Use deeper fill depth for carrots and potatoes while keeping pathways unfilled.
Convert all dimensions to feet before multiplying, or use consistent inches and divide by 1,728 for cubic feet.
Soil should sit slightly below the rim to prevent washout. Account for a 1-inch gap below the cap board.
Order the right amount of soil before delivery day. Enter bed dimensions and depth to get cubic feet, cubic yards, and bag counts for common sizes.