How to take into account unedged boards when calculating?

The calculator is designed for edged lumber. For unedged boards the error is high due to wane, we recommend using a reduction factor or taking a margin of 20-30%.

How to count materials of different lengths?

Calculate each group of lengths separately (for example, first all 6-meter boards, then 4-meter ones) and add up the resulting volumes.

Why may the actual volume not coincide with the calculated volume?

The calculator calculates the ideal geometric figure. In reality, 'shrinkage' (change in size during drying) and sawmill tolerances influence.

Lumber cubic capacity calculator

🌲 Calculation of lumber cubic capacity: quickly and without errors

Our tool solves two main tasks for the builder: converts pieces into cubic meters (for purchase) and cubic meters into pieces (for checking the supplier). Works with timber, edged boards and logs.

💡 Why is this necessary? Suppliers always sell timber in cubic meters (m³), but you build in pieces (rafters, joists). An error in calculations of 0.5 m³ can cost you several thousand rubles.

Instructions: how not to make mistakes

Select material: Timber (for walls/frame), Board (for floor/sheathing) or Log.
Indicate dimensions: Enter data in millimeters (standard: 150x150x6000).
Select calculation direction:
- Find the volume: if you know how many pieces are needed.
- Find quantity: if you know the order volume in cubes.

📌 Examples from life

Task 1: Purchase of timber

You need 50 pieces of 150x150 timber, 6 meters long, to build a bathhouse. How many cubes should I order?

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Calculator answer: 6.75 m³.
Tip: order 7 m³ with a reserve for trimmings.

Task 2: Checking delivery

They brought you 2 inch cubes (board 25x100x4000). Do you want to count the boards so as not to be deceived?

Calculator answer: There should be exactly 200 pieces.

For complex structures, for example, calculating materials for a flight of stairs, we recommend using a specialized staircase calculator.

⚠️ Important: shrinkage and loss coefficient

The calculator calculates the “pure” geometric volume. In reality, you need to consider:

Shrinkage: If you take wood with natural moisture, the actual size may be 2-3 mm less than declared.
Margin: Always add 5-7% to the calculated volume for trimming and scrap.
Remainings: To accurately calculate the usable volume of premises, use our volume calculator.

Frequently asked questions (FAQ)

🌲 How to take into account an unedged board?

This calculator is only accurate for trim material (flat rectangle). For unedged boards, the error is 20-30% due to bark and voids (wane). We recommend using a reduction factor of 0.7-0.8.

📏 What to do if the boards are of different lengths?

Count each group separately. First enter the data for 6-meter boards, write down the result, then for 4-meter boards. Add up the resulting cubic meters.

🚛 How to calculate whether it will fit in a Gazelle?

In addition to volume, weight is important. 1 cube of dry pine weighs about 500 kg, and freshly cut pine weighs up to 800 kg. A standard Gazelle takes 1.5 tons (about 2-3 cubic meters of raw wood).