# DirtMath — landscape material calculators

Free client-side calculators that convert an area and depth into cubic yards, tons, bag counts and cost estimates. No account, no data collection.

## Calculators

- [Mulch calculator](/mulch-calculator)
- [Topsoil calculator](/topsoil-calculator)
- [Gravel calculator](/gravel-calculator)
- [Sand calculator](/sand-calculator)
- [River rock calculator](/river-rock-calculator)
- [Sod calculator](/sod-calculator)
- [Grass seed calculator](/grass-seed-calculator)
- [Compost calculator](/compost-calculator)
- [Paver calculator](/paver-calculator)
- [Retaining wall block calculator](/retaining-wall-block-calculator)
- [Rubber mulch calculator](/rubber-mulch-calculator)
- [Pine straw calculator](/pine-straw-calculator)
- [Cubic yard calculator](/cubic-yard-calculator)
- [Stone calculator](/stone-calculator)
- [Dirt calculator](/dirt-calculator)
- [Pea gravel calculator](/pea-gravel-calculator)
- [Fill dirt calculator](/fill-dirt-calculator)
- [Square feet to cubic yards calculator](/square-feet-to-cubic-yards-calculator)

## Reference

- [How we calculate](/how-we-calculate): every density, coverage rate and formula used, with assumptions stated.
- [About us](/about): who built the site, why it exists, and how it is funded.
- [Contact us](/contact): how to send corrections or feature requests.
- [Privacy policy](/privacy-policy): data, cookies, and advertising disclosures.
- [Terms of service](/terms-of-service): rules for using the site and its calculators.

## Notes

- Results are planning estimates, not engineering specifications.
- Product links are Amazon affiliate links; they never affect calculated results.