Estimate guitar body volume and weight by body shape family and wood density. Compare double-cut, single-cut, carved-top, horned double-cut, sharp-V and pointed offset outlines.
Choose a body-shape family, then enter the bounding-box width, length and thickness in millimeters and the wood density in g/cm³. The shape families carry generic fill factors — the fraction of the rectangular bounding box that the real outline occupies: offset double-cut 0.62, single-cut 0.68, carved-top 0.70, horned double-cut 0.55, sharp V 0.45, and pointed offset 0.48.
Volume equals box volume times that fill factor, then weight equals volume times density. A 320 × 460 × 45 mm double-cut slab in alder (0.45 g/cm³) gives a box of about 6,624 cm³, a body volume near 4,107 cm³ after the 0.62 factor, and an estimated weight of about 1.85 kg — squarely in the typical 1.5–2.0 kg range for an alder double-cutaway.
Heavier woods and fuller outlines add up fast. The same dimensions as a single-cut (factor 0.68) in mahogany (0.55 g/cm³) yield roughly 5,049 cm³ and about 2.78 kg. Use the comparison to chamber a heavy blank, choose a lighter species, or sanity-check a build before cutting. Densities here are nominal averages; real boards vary by several percent piece to piece.
An alder double-cutaway body typically weighs 1.5–2.0 kg depending on density and exact dimensions. A 320 × 460 × 45 mm slab in alder (0.45 g/cm³) computes to about 4,107 cm³ of body volume and roughly 1.85 kg in this tool, right in that range.
Basswood (0.40–0.45 g/cm³) and alder (0.42–0.48 g/cm³) are among the lightest common guitar body woods, which is why they dominate lightweight solid-body builds. Mahogany (≈0.55) and especially maple (≈0.68) add noticeably more weight for the same outline.
It is the fraction of the rectangular bounding box that the real outline actually fills. The families range from a full single-cut at 0.68 and carved-top at 0.70 down to a sharp V at 0.45 and a pointed offset at 0.48, with the offset double-cut at 0.62. Multiplying box volume by this factor approximates the curved body without needing a CAD outline.
Weight is simply volume times density, so denser wood scales the result directly. Taking the same dimensions as a single-cut (factor 0.68) in mahogany (0.55 g/cm³) gives about 5,049 cm³ and roughly 2.78 kg — nearly a kilogram heavier than the lighter alder example. Use the comparison to decide whether to chamber a heavy blank or switch species before cutting.