Quick answer
Gravel Calculator: what it calculates
Gravel Calculator calculates gravel needed from length, width and depth. The core method is Cubic yards = length x width x depth in feet / 27; tons = cubic yards x tons per yard.
Everyday Calculators
Gravel Calculator
Use this gravel calculator to estimate cubic yards, tons, and material cost for paths, driveways, beds, and base layers.
Reviewed May 25, 2026EstimateFormula shown
ResultGravel needed
InputsLength, Width, Depth, Tons per yard, Price per ton
FormulaGravel formula
Live calculator
Gravel
Gravel volume1.22 yd3
33 cubic feet with waste.
Estimated tons1.65
Uses 1.35 tons per cubic yard.
Material cost$74.25
Estimated tons multiplied by price per ton.
Formula
Gravel formula
Cubic yards = length x width x depth in feet / 27; tons = cubic yards x tons per yardDepth entered in inches is converted to feet. Tons per yard varies by material, moisture, and compaction.
How to use
Steps
- Enter project length and width in feet.
- Enter gravel depth in inches.
- Add waste for grading, compaction, and uneven base.
- Enter tons per cubic yard and price per ton for a material-cost estimate.
Example
Sample calculation
20 ft x 6 ft area120 sq ft
3 in depth with 10% waste1.22 yd3
At 1.35 tons/yd31.65 tons
Calculator use
Best for
- Quick gravel needed from length, width and depth.
- Quick everyday math with the result and formula in one place.
- Shopping, date, time, unit, school, or household comparisons.
- A fast check before moving the numbers into a spreadsheet.
Before relying on it
Check first
- Entering length, width and depth from different time periods or scenarios.
- Mixing units, dates, or original values across the same calculation.
- Rounding early and then using the rounded number in another step.
- Copying a result without checking whether the inputs match the real-world question.
Details
What to know before using the result
These notes make the assumptions explicit, especially where the same search query can mean slightly different things.
VolumeArea x depth
The calculator converts inches to feet before calculating cubic feet, then divides by 27 for cubic yards.
Tons estimateDensity input
Gravel weight varies by stone type, size, moisture, and compaction. Use the supplier's tons-per-yard estimate if available.
Ordering bufferWaste percent
A buffer helps with uneven ground, raking, compaction, and measurement differences.
Source notes
References used for this calculator
Benchmarks
How to read the result
The calculator is a decision aid, not a fixed rule. Use the output to compare scenarios and document your assumptions.
2 inLight top layer
Often used for decorative refreshes or paths with an existing base.
3 - 4 inCommon landscape depth
Useful for many walkways, beds, and small projects.
CompactionOrder carefully
Base layers, driveways, and drainage projects may need a deeper or engineered section.
Calculator accuracy
Methodology and assumptions
The formula, inputs, example, and limitations are shown so the result is checkable, not just a number in a box.
Formula
Cubic yards = length x width x depth in feet / 27; tons = cubic yards x tons per yard
Inputs used
Length, Width, Depth, Tons per yard, Price per ton
Limitations
Results are estimates for quick planning and should be checked before important financial, legal, tax, health, or business decisions.
Last reviewed
May 25, 2026
Cite this page
Toolkit Shelf. Gravel Calculator. Retrieved May 25, 2026, from https://toolkitshelf.com/tools/gravel-calculator
FAQ
Common questions
How do I calculate gravel needed?
Multiply length by width by depth in feet to get cubic feet, divide by 27 for cubic yards, then multiply by tons per yard if ordering by weight.
How deep should gravel be?
Decorative refreshes may use a thinner layer, while paths, driveways, and base layers often need more depth and preparation.
Why does gravel weight vary?
Stone type, size, moisture, compaction, and supplier measurement can change how many tons fit in a cubic yard.