Log Weight Calculator

To calculate log weight by hand: weight = volume × wood density. For a straight log, volume = π × (diameter/2)² × length. Example: a 24-inch-diameter, 16-foot white oak log holds π × 1² × 16 = 50.27 ft³. Green white oak weighs 63 lb/ft³ (Iowa DOT/USDA Wood Handbook), so the log weighs about 3,166.7 lb — roughly 1.58 US tons.

How much does a 16 foot log weigh? At 24-inch diameter (white oak, green): about 3,166.7 lb (1.58 US tons); air-dried to 12% moisture the same log is about 2,362.5 lb. Smaller logs are much lighter: a 12-inch-diameter, 16-foot log is only a quarter of the volume, so around 792 lb green.

Large. Fresh-cut (green) wood can carry 30–50% more weight as water, which is why a dedicated green log weight calculator matters for hauling. White oak drops from 63 lb/ft³ green to 47 lb/ft³ air-dry; red oak from 64 to 44; southern yellow pine from 55 to 41. Always pick the condition that matches the log — a fresh-felled log is always green.

Divide total weight by length — in other words, how much does a white oak log weigh per foot? For the worked 24-inch × 16-foot green white oak log (3,166.7 lb): about 197.9 lb per foot. Weight per foot scales with the square of diameter, so a 12-inch log of the same species is about 49.5 lb/ft. The single-log tab above doubles as a log weight per foot calculator.

Compare the load weight to the payload — treat the truckload tab as your log truck weight calculator and log tonnage calculator. Example: ten 20-inch-diameter, 14-foot red oak logs (green) weigh about 19,548 lb total (9.77 US tons) — that fits one log truck (40,000 lb payload) but needs 2 trips with a small dump truck (12,000 lb payload).

Bark typically adds 5–15% of outside volume depending on species. This calculator lets you deduct a bark percentage (default 8%). For precise scale-weight work, weigh the log; for estimates, the bark deduction keeps results honest.

Substantially lighter. So how heavy is a log, really? It depends almost entirely on species and moisture. A 20-inch-diameter, 14-foot log weighs about 1,679.9 lb green in southern yellow pine (55 lb/ft³) versus about 1,924.2 lb in white oak (63 lb/ft³). Use the calculator above as a pine log weight calculator by picking Southern yellow pine; softwoods like pine and cedar are always lighter than dense hardwoods like oak and hickory.

Use the frustum formula: V = π × L / 3 × (R1² + R1·R2 + R2²), then multiply by density — the tapered log weight calculator option in the single-log tab uses this exact formula. Example: a 16-foot white oak log with a 24-inch butt and 20-inch top holds about 42.35 ft³ — roughly 2,668 lb green, versus 3,166.7 lb for a full 24-inch cylinder.

This tool weighs one or more whole logs from diameter × length × species density — for hauling, lifting, and load planning. A firewood stack calculator (see our firewood stack calculator) weighs stacked, split firewood in cords. Different inputs, different job.

No — it calculates weight from log dimensions and wood density, showing results in lb, kg, US tons and metric tonnes. If you only need to convert weight units, use our weight-to-mass converter instead.

A 20-inch-diameter, 14-foot black walnut log (green, 58 lb/ft³) weighs about 1,771.5 lb. Air-dried (38 lb/ft³) the same log is about 1,160.6 lb — walnut sits between the light softwoods and the heavy oaks.

This page works like a log weight calculator app with no install: it runs 100% in your browser, works offline once loaded, and handles imperial and metric units. Bookmark it on your phone for the woodyard or the landing.