What is unit-of-measure normalisation?

Unit-of-measure normalisation means converting quantities recorded in different units into one agreed unit, with the conversion rule written down, so that figures from different sources can be added and compared. It isn't the same as data normalisation in the database sense, which is about how tables are structured. In timber, each record along the chain tends to carry a different unit and a different convention, so the rule matters as much as the arithmetic.

When the factor isn't fixed

Some conversions are constants. Others depend on the wood. A university extension table for pine sawtimber, reviewed in January 2026, shows that "Weight can vary from a high of 14 tons/MBF for 10-inch DBH timber down to 4.4 tons/MBF for 36-inch timber". It adds that the conversions are "estimates and guidelines only". A single weight-to-volume factor applied across all sizes will be wrong for most of them. So the factor, and what it depends on, belongs in the written rule.

Conventions matter too. Wikipedia defines the board foot as 144 cubic inches, but notes that for surfaced softwood "nominal dimensions are still used when calculating board feet". The trade prices on that convention, so it rarely causes trouble within one business. It matters when nominal and actual volumes meet in the same report.

What goes wrong

In our experience, costly errors are often in the label rather than the formula: an item bought per thousand board feet recorded per piece, or a price per ton applied to a quantity in cubic metres. From Quarri's own work with a lumber and millwork manufacturer: a units labelling error had inflated recorded purchase spend by about a fifth.

How to do it well

Pick one standard unit for each measure. Write down each conversion, the factor and the convention it uses, such as green or dry and gross or net. Keep the original quantity and unit beside the converted one, so any figure can be traced back. Check the units on new item records before they are used.

What it isn't

Normalisation isn't rounding, and it doesn't mean one unit for the whole business. Teams can keep their working units, provided the conversion between them is agreed and recorded.

Quarri for wood products is built around how a wood products plant runs, where the order book meets real capacity.

Quarri is an AI-native data platform for the timber supply chain. It connects buying, production, sales and inventory for forest management, sawmill, wood products and pulp, paper and packaging operators.