# Gravel Calculator

> Estimate the amount of gravel needed for your driveway, path, or landscaping project.

Page: https://askcalculators.com/calculator/gravel-calculator/
Definition: https://askcalculators.com/calculator/gravel-calculator/definition.json
JSON Schema: https://askcalculators.com/calculator/gravel-calculator/schema.json
Version: 7.0.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/calculator/gravel-calculator/?length=20&width=10&depth=4

## Inputs
- length: Length (ft); type=number; optional; default=20
- width: Width (ft); type=number; optional; default=10
- depth: Depth (inches); type=number; optional; default=4

## Outputs
- result: Result; format=text; primary

## Formula
Volume = area × depth; estimated weight = volume × selected gravel density.

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.