`m = 708.00 " kg/"m^3* "n" * L * T * W `

Enter a value for all fields

The Weight of Black Locust Boards calculator computes the weight of locust boards based on the number and dimensions of the boards, and a density of 708.00 kg/m³ for dry locust wood.

INSTRUCTIONS: Enter the following:

• (n) Number of boards
• (L) Length of the boards
• (W) Width of the boards
• (T) Thickness of the boards
• (ρ) Density of Wood

Weight of Black Locust Boards (m): The function returns the weight in pounds. However this can be automatically converted to compatible units via the pull-down menu. 

The Math / Science

Black locust, Robinia pseudoacacia, is a hardwood native to the Southern Appalachians and portions of the Midsouth. Other names for black locust include common locust, false acacia, green locust, pea flower locust, white locust, and yellow locust. Black locust lumber has an approximate density of 708.00 kilograms per cubic meter (44.20 pounds per cubic foot). It is often used for fence posts, boats, flooring, furniture, mine timbers, and veneer.

---

Density of Wood

Different types of wood have different naturally occurring densities.  Because wood is a porous material, different kinds of wood can have more or fewer wood cells per volume of space.  This defines the wood's density.  Moisture is a major factor where wood boards are heavier if they have an increased water content.  The water in wood can be free or bound, where free water can move through connecting cells to the end surfaces.  Free water can be largely reduced through drying in kilns or dry storage.  Bound water is within cells and is harder to remove.  However, removing bound water increases the strength of the wood boards.  That is why processed lumber is stronger than rough cut boards of the same dimensions.

The formula for the weight of wood boards is as follows:

         M = ρ • n • L • W • T

where:

• M is the mass or weight of wood boards
• ρ is the density of the solid wood
• n is the number of boards
• L is the length of the boards
• W is the width of the boards
• T is the thickness of the boards

CAUTION: The following information is for calculating convenience with NO implied guarantees to the accuracy of the values listed. Authoritative sources should be sought to confirm any value before risking health or wealth on the veracity of the data.

Common Name of Wood	Botanical Name	Density (kg/m³)	Lumber Weight Calculators
Alder	Alnus	380.01	Weight of Alder Boards
Applewood or wild apple	Pyrus malus	745.00	Weight of Apple Wood Boards
Ash (black)	Fraxinus nigra	526.00	Weight of Black Ash Boards
Ash (blue)	Fraxinus quadrangulata	603.00
Ash (green)	Fraxinus pennsylvanica lanceolata	610.00
Ash (white)	Fraxinus americana	638.00
Aspen	Populus tremuloides	401.00	Weight of Aspen Boards
Aspen (large tooth)	PopuIus grandidentata	412.00
Balsa (Tropical America)	Ochroma pyramidale	155.00	Weight of Balsa Boards
Basswood	Tilia glabra or Tilia americanus	398.00	Weight of Basswood Boards
Beech	Fagus grandifolia or Fagus americana	655.00	Weight of Beach Boards
Beech (blue)	Carpinus caroliniana	717.00
Birch (gray)	Betula populifolia	552.00
Birch (paper)	Betula papyrifera	600.00
Birch (sweet)	Betula lenta	714.00
Birch (yellow)	Betula lutea	668.00
Boxwood/Buis	Buxus sempervirens	1000.00
Bubinga	Guibourtia spp	890.00
Buckeye (yellow)	Aesculus octandra	383.00
Butternut	Juglans cinerea	404.00
Cedar (eastern red)	Juniperus virginiana	492.00
Cedar (northern white)	Thuja occidentalis	315.00
Cedar (southern white)	Chamaecyparis thyoides	352.00
Cedar (Tropical American)	Cedrela odorata	535.00
Cedar (western red)	Thuja plicata	344.00	Weight of Western Red Cedar Boards
Cherry (black)	Prunus serotina	534.00	Weight of Black Cherry Boards
Cherry (wild red)	Prunus pennsylvanica	425.00
Chestnut	Castanea dentata	454.00
Cocobolo	Dalbergia retusa	1100.00
Corkwood	Leitneria floridana	207.00
Cottonwood (eastern)	Populus deltoides	433.00
Cypress (southern)	Taxodium distichum	482.00
Dogwood (flowering)	Cornus florida	796.00
Douglas fir (coast type)	Pseudotsuga taxifolia	512.00	Weight of Douglas Fir Boards
Douglas fir (mountain type)	Pseudotsuga taxifolia	446.00
Ebony (India)	(Andaman marble-wood) Diospyros kurzii	979.04	Weight of Andaman Marblewood Boards
Ebony (E. Africa)	(Ebène marbre) Mauritius Diospyros melanida	768.83
Elm (American)	Ulmus americana	554.00	Weight of American Elm Boards
Elm (rock)	Ulmus racemosa or Ulmus thomasii	658.00
Elm (slippery)	Ulmus fulva or pubescens	568.00
Eucalyptus (Karri)	Eucalyptus diversicolor  (W. Australia)	829.76
Eucalyptus (Bimble Box)	Eucalyptus  (New South Wales)	1059.05	Weight of Bimble Box Boards
Eucalyptus (West Australian mahogany)	Eucalyptus marginata	787.75
Fir (balsam)	Abies balsamea	414.00	Weight of Balsam Fir Boards
Fir (silver)	Abies amabilis	415.00	Weight of Silver Fir Boards
Goncalo Alves	Astronium fraxinifolium, Astronium graveolens	960.00
Greenheart (British Guiana)	Nectandra rodioei	1145.00
Grenadilla (Mpingo)	Dalbergia melanoxylon	1225.00
Gum (black)	Nyssa sylvatica	552.00	Weight of Black Gum Boards
Gum (blue)	Eucalyptus globulus	796.00
Gum (red)	Liquidambar styraciflua	530.00
Gum (tupelo)	Nyssa aquatica	524.00
Hemlock (eastern)	Tsuga canadensis	431.00
Hemlock (mountain)	Tsuga martensiana	480.00
Hemlock (western)	Tsuga heterophylla	432.00
Hickory (bigleaf shagbark)	Hicoria laciniosa	810.20
Hickory (mockernut)	Hicoria alba	821.10	Weight of Mockernut Hickory
Hickory (pignut)	Hicoria glabra	821.10
Hickory (shagbark)	Hicoria ovata	836.49
Hornbeam	Ostrya virginiana	762.00	Weight of Hornbeam Boards
Ironwood (black)	Rhamnidium ferreum	1188.50	Weight of Black Ironwood Boards
Jacarandá (Brazilian rosewood)	Dalbergia nigra	850.92
Larch (western)	Larix occidentalis	587.00	Weight of Larch Boards
Lignum Vitae	Guaiacum officinale and Guaiacum sanctum	1290.00
Locust (black or yellow)	Robinia pseudacacia	708.00	Weight of Black Locust Boards
Locust (honey)	Gleditsia triacanthos	666.00
Magnolia (cucumber)	Magnolia acuminata	516.00
Mahogany (W. Africa)	Khaya ivorensis	668.62	Weight of African Mahogany Boards
Mahogany (E. India)	Swietenia macrophylla	540.51
Mahogany (American)	Swietenia mahogani	540.51	Weight of American Mahogany Boards
Maple (black)	Acer nigrum	620.00	Weight of Black Maple Boards
Maple (red)	Acer rubrum	546.00
Maple (silver)	Acer saccharinum	506.00
Maple (sugar)	Acer saccharum	676.00	Weight of Sugar Maple Boards
Mpingo (Grenadilla)	Dalbergia melanoxylon	1225.00
Oak (black)	Quercus velutina	669.00	Weight of Black Oak Boards
Oak (bur)	Quercus macrocarpa	671.00
Oak (canyon live)	Quercus chrysolepis	838.00
Oak (laurel)	Quercus montana	674.00
Oak (live)	Quercus virginiana	977.00	Weight of Live Oak Boards
Oak (pin)	Quercus pallustris	677.00
Oak (post)	Quercus stellata or Quercus minor	738.00
Oak (red)	Quercus borealis	657.00
Oak (scarlet)	Quercus coccinea	709.00
Oak (swamp chestnut)	Quercus montana (Quercus prinus)	756.00
Oak (swamp white)	Quercus bicolor or Quercus platanoides	792.00
Oak (white)	Quercus alba	710.00
Persimmon	Diospyros virginiana	776.00	Weight of Persimmon Boards
Pine (eastern white)	Pinus strobus	373.00	Weight of Eastern White Pine
Pine (jack)	Pinus banksiana or Pinus divericata	461.00
Pine (loblolly)	Pinus taeda	593.00
Pine (longleaf)	Pinus palustris	638.00
Pine (pitch)	Pinus rigida	542.00
Pine (red)	Pinus resinosa	507.00
Pine (shortleaf)	Pinus echinata	584.00
Poplar (balsam)	Populus balsamifera or Populus candicans	331.00	Weight of Balsam Poplar Boards
Poplar (yellow)	Liriodendron tulipifera	427.00	Weight of Yellow Poplar Boards
Redwood	Sequoia sempervirens	436.00	Weight of California Redwood Boards
Rosewood (Bolivian)	Machaerium villosum, M. scleroxylon & M. acutifolium	710.00
Rosewood (E. Indian)	Dalbergia latifolia	780.00
Sassafras	Sassafras uariafolium	473.00
Satinwood (Ceylon)	Chloroxylon swietenia	1032.11
Sourwood	Oxydendrum arboreum	593.00
Spruce (black)	Picea mariana	428.00	Weight of Black Spruce Boards
Spruce (red)	Picea rubra or Picea rubens	413.00
Spruce (white)	Picea glauca	431.00	Weight of White Spruce Boards
Sycamore	Platanus occidentalis	539.00
Tamarack	Larix laricina or Larix americana	558.00
Teak (India)	Tectona grandis	582.52
Walnut (black)	Juglans nigra	562.00
Willow (black)	Salix nigra	408.00

CAUTION: The above information is for calculating convenience with NO implied guarantees to the accuracy of the values listed. Authoritative sources should be sought to confirm any value before risking health or wealth on the veracity of the data.