What this tool does
Calculate area × depth, estimate mass using editable density, compare bag and bulk quotes, and print the assumptions. Multiple areas and layers keep different materials separate.
Built around your measurements
Use numeric dimensions, an editable scaled polygon or a calibrated top-down plan. Core calculations run on your device. No account or image upload is required. The optional street map loads an external provider when you open the map measurement page.
Transparent limits
Weight depends on density. Purchasing depends on your supplier’s units, minimums and increments. The calculator does not survey terrain, measure depth from an image, certify construction or quote live supplier prices. The methodology documents the calculation and source assumptions.
Editorial approach
Guides use original worked calculations and named references. The GravelMeasure editorial team checks the arithmetic and documents the assumptions; the guides do not claim professional engineering review. Corrections should describe the input, expected output and source so the calculation can be reproduced.