Gravel Volume Formula:
Definition: This calculator estimates the volume of gravel needed based on the length, width, and depth of the area to be covered.
Purpose: It helps construction professionals and DIYers determine how much gravel is required for projects like driveways, walkways, or foundation bases.
The calculator uses the formula:
Where:
Explanation: The length, width, and depth are multiplied to get cubic feet, then divided by 27 to convert to cubic yards.
Details: Accurate volume calculation ensures proper material ordering, avoids project delays, and prevents unnecessary expenses from over-ordering.
Tips: Measure the length and width of your project area in feet. For depth, consider the recommended gravel thickness for your application (typically 4-6 inches for driveways).
Q1: Why divide by 27?
A: There are 27 cubic feet in 1 cubic yard, so dividing by 27 converts cubic feet to cubic yards.
Q2: What depth should I use?
A: Common depths are 4 inches (0.33 ft) for walkways, 6 inches (0.5 ft) for driveways, and 12 inches (1 ft) for heavy-use areas.
Q3: How do I measure irregular areas?
A: Break the area into rectangles, calculate each separately, then sum the volumes.
Q4: Does this include compaction?
A: No, consider adding 10-20% more gravel to account for compaction, especially for deeper layers.
Q5: How many tons is this?
A: Multiply cubic yards by 1.4 (average gravel density) to estimate tons needed.