---
title: "Green Log Weight Calculator"
description: "Weight of round timber at any moisture content, by species — Wood Handbook 2021 data."
image: "https://nestingcalc.com/og-default.png"
url: "https://nestingcalc.com/log-weight-calculator/"
locale: "en"
---

# Green Log Weight Calculator

Weight of round timber at any moisture content, by species — Wood Handbook 2021 data.

Pick a species (14 verified basic-density presets including acacia, rubberwood, eucalyptus, oak and teak) or enter a custom basic density, add the log volume and moisture content, and get the batch weight in kilograms and tonnes with the oven-dry wood mass and water content broken out.

Interactive calculator (open in browser): [https://nestingcalc.com/log-weight-calculator/](https://nestingcalc.com/log-weight-calculator/)

## FAQ

What is basic density (Gb)?

Basic density is the oven-dry mass of wood divided by its volume when green (fresh), in kg/m³. Because the oven-dry mass never changes while the wood dries, weight at any moisture content is simply volume × Gb × (1 + MC/100). Typical values: spruce ~355, acacia mangium ~560, white oak ~600 kg/m³.

Why does freshly felled wood weigh so much more than dried wood?

Green wood can hold more water than solid wood — moisture content on the oven-dry basis often reaches 70–120% in tropical species. One cubic metre of acacia mangium at 73% MC weighs about 969 kg, but only 560 kg oven-dry: over 40% of the green weight is water.

Can moisture content be above 100%?

Yes. MC on the oven-dry basis compares water mass against dry wood mass, not against total mass, so 150% MC simply means 1.5 kg of water per kg of dry wood. Sapwood of tropical hardwoods and eucalyptus regularly exceeds 100%.

## Related calculators

-   [Log Volume Calculator (Huber, Smalian, Newton)](https://nestingcalc.com/log-volume-calculator/)

    Estimate the cubic volume of a log with Huber, Smalian or Newton — free.

-   [Lumber Weight Calculator (kg/m³)](https://nestingcalc.com/lumber-weight-calculator/)

    Weight of any board by species and size, dry or green — density table for 18 species included. Free.

-   [Hoppus Volume Calculator (Quarter-Girth Rule)](https://nestingcalc.com/hoppus-calculator/)

    Calculate Hoppus volume, true volume and Hoppus tons for round logs — free.

-   [Stowage Factor Calculator](https://nestingcalc.com/stowage-factor-calculator/)

    SF = volume ÷ tonnes — check timber parcels against IMO reference ranges.

## Related guides

-   [Green Log Weight: Formula, Species Table and Handling Safety](https://nestingcalc.com/guides/green-log-weight-safety/)

    Green weight = volume × basic density × (1 + MC%): a Wood Handbook species table, worked examples in kg per log, and the handling rules that keep crews safe.

-   [Lumber Weight by Species: Charts, Moisture and Truck Payload](https://nestingcalc.com/guides/lumber-weight-chart/)

    A load of green oak and a load of dry spruce are two different trucks. Species density, moisture content and payload limits — how they add up.

-   [Wood Moisture Content: the Number Behind Every Kiln Schedule](https://nestingcalc.com/guides/wood-moisture-content-basics/)

    What MC actually means, why it is not the same as water weight, and how to use it for shipping, drying and inventory decisions.

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