About Rock Tumbler Calculator

Rock Tumbler Calculator is a browser-local planning tool for rotary tumbling batches. It estimates barrel fill, grit tablespoons, media top-ups, water line, and stage timing from the information you enter.

The calculator is intentionally limited: it is not an equipment diagnosis service, a polish guarantee, a mineral safety classifier, or an official supplier instruction sheet. Use it as a quick pre-run checklist and follow your tumbler and grit supplier directions for critical decisions.