# Square Footage Calculator

> Free browser-based calculators for area, material volume, and gravel estimates. Canonical website: https://www.squarefootagecalculator.vip

The HTML pages contain the formulas, examples, and limitations without requiring JavaScript. JavaScript is only needed for interactive calculation. This file is a navigation aid, not a claim of search eligibility or AI endorsement.

## Tools
- [Square Footage Calculator](https://www.squarefootagecalculator.vip/): Rectangles, circles, triangles, multiple areas, area conversions, extra material, and optional cost in USD.
- [Cubic Yard Calculator](https://www.squarefootagecalculator.vip/cubic-yard-calculator/): Dimensions or known area plus depth; outputs cubic yards, cubic feet, and cubic meters.
- [Gravel Calculator](https://www.squarefootagecalculator.vip/gravel-calculator/): Bulk volume, US short tons, metric tonnes, whole bags, and optional material cost.

## Definitions and limits
- Area in square feet = length in feet multiplied by width in feet, for a rectangle.
- Cubic yards = area in square feet multiplied by depth in inches, divided by 324.
- US short tons = cubic yards multiplied by bulk density in US short tons per cubic yard.
- 1 US short ton is 2,000 pounds; 1 metric tonne is 1,000 kilograms.
- Gravel density presets are editable assumptions, not universal constants. No automatic compaction factor is applied.
- Extra material is optional; prices are user-entered and exclude delivery, labor, and tax.

## More
- [Methodology and sources](https://www.squarefootagecalculator.vip/methodology/): Formulas, units, assumptions, tests, and limitations.
- [Privacy](https://www.squarefootagecalculator.vip/privacy/): Browser processing and hosting notes.
- [Sitemap](https://www.squarefootagecalculator.vip/sitemap.xml)