Wood Density: Weight of 1 m³ of Timber and Density Table

A board is a sawn timber product manufactured by longitudinally cutting logs. When calculating the weight of wooden structures, wood density is the primary value used because it determines the weight of one cubic meter of material.

Wood Density Table

Although many users search for “specific weight of wood boards”, the values below are wood density (kg/m³) at different moisture contents.

Wood species	Fresh	100%	80%	70%	60%	50%	40%	30%	25%	20%	15%
Larch	940	1100	990	930	880	820	770	710	700	690	670
Poplar	700	760	690	650	610	570	540	500	480	470	460
Beech	960	1110	1000	950	890	830	780	720	710	690	680
Elm	940	1100	1100	930	880	820	770	710	690	680	660
Oak	990	1160	1160	990	930	870	820	760	740	720	700
Hornbeam	1060	1330	1330	1130	1000	990	930	860	840	830	810
Norway spruce	740	750	750	640	600	560	520	490	470	460	450
Walnut	910	1000	1000	850	800	750	700	650	630	610	600
Linden	760	830	830	710	660	620	580	540	540	530	500
Black locust	1030	1330	1330	1190	1060	990	930	860	840	830	810
Alder	810	880	880	750	700	660	620	570	560	540	530
Maple	870	1160	1160	990	930	870	820	760	740	720	700
Ash	960	1150	1150	930	920	860	800	740	730	710	690
Siberian fir	680	630	630	540	510	470	440	410	400	390	380
Scots pine	820	850	850	720	680	640	590	550	540	520	510
Caucasian fir	720	730	730	620	580	550	510	480	460	450	440
Siberian cedar pine	760	730	730	620	580	550	510	480	460	450	440
Birch	870	1050	1050	890	840	790	730	680	670	650	640
Aspen	760	830	830	710	660	620	580	540	530	510	500

Weight Calculation

m = ρ × V

where m is mass, ρ is wood density (kg/m³), and V is volume (m³).

Wood Density

Wood density depends mainly on the species and moisture content. The higher the moisture content, the greater the weight of one cubic meter.

Conclusion

Depending on the species and moisture content, wood density typically ranges from 380 to 1330 kg/m³. Use the values in the table for engineering and construction calculations.

Frequently Asked Questions

What does board weight depend on?

Board weight depends on wood species, moisture content, actual dimensions, annual-ring density and knots. The table therefore gives reference values, not one fixed weight for every board.

How do you calculate board weight?

Multiply board volume by the density of the selected species at the required moisture content. For example, 0.05 m³ at 510 kg/m³ weighs about 25.5 kg.

Why is a wet board heavier than a dry one?

Moisture adds mass and changes wood density. Calculations should therefore use density at a moisture content close to the actual condition.