OWIC Shrink-Swell Tool

  1. Enter the species number from the tables at the bottom of this page:

    Species A:   Species B:
    Note: program allows for comparing 2 species, exposed to identical conditions, and of identical size and grain orientation

  2. Enter the intial and final moisture conditions (moisture content if known or temperature and relative humidity)
    Initial Conditions
    Moisture Content: (%) OR Temp.:    Relative Humidity (%):
    °F    °C
    Final Conditions
    Moisture Content:(%) OR Temp.:   Relative Humidity (%):

  3. Enter dimensions: (inches mm) Thickness:      Width:

  4. Select the grain orientation:
    flatsawn   quartersawn   mixed

   

Results will appear in this section

Table of Species

North American Hardwoods
#Species Name
1alder, red
2ash, black
3ash, green
4ash, Oregon
5ash, pumpkin
6ash, white
7aspen, quaking
8basswood, American
9beech, American
10birch, paper
11birch, river
12birch, sweet
13birch, yellow
14buckeye, yellow
15butternut
16cherry, black
17chestnut, American
18cottonwood, black
19cottonwood, eastern
20elm, American
21elm, cedar
22elm, rock
23elm, slippery
24elm, winged
25hackberry
26hickory, pecan
27hickory, mockernut
28hickory, pignut
29hickory, shagbark
30hickory, shellbark
31holly, American
32honeylocust
33locust, black
34madrone, Pacific
35magnolia, cucumbertree
36magnolia, Southern
37magnolia, sweetbay
38maple, bigleaf
39maple, black (hard maple)
40maple, red (soft maple)
41maple, silver (soft maple)
42maple, sugar (hard maple)
43oak, black
44oak, laurel
45oak, Northern red
46oak, Southern red
47oak, water
48oak, willow
49oak, live
50oak, overcup
51oak, white
52persimmon, common
53poplar, yellow-
54sassafras
55sweetgum
56sycamore, American
57tanoak
58tupelo, black
59tupelo, water
60walnut, black
61willow, black
North American Softwoods
#Species Name
62baldcypress
63cedar, Alaska-
64cedar, Atlantic white-
65cedar, eastern red
66cedar, incense-
67cedar, Northern white-
68cedar, Port-Orford-
69cedar, western red
70Douglas-fir, coast
71Douglas-fir, interior north
72Douglas-fir, interior west
73fir, balsam
74fir, California red
75fir, grand
76fir, noble
77fir, Pacific silver
78fir, subalpine
79fir, white
80hemlock, eastern
81hemlock, western
82juniper, western
83larch, western
84pine, eastern white
85pine, jack
86pine, loblolly
87pine, lodgepole
88pine, longleaf
89pine, pond
90pine, ponderosa
91pine, red
92pine, shortleaf
93pine, slash
94pine, sugar
95pine, Virginia
96pine, western white
97pine, radiata (Monterey)
98redwood, old-growth
99redwood, young-growth
100spruce, black
101spruce, Engelmann
102spruce, red
103spruce, Sitka
104tamarack
Tropical Hardwoods
#Species Name
105
andiroba, crabwood
(Carapa guianensis)
106
angelique
(Dicorynia guianensis)
107
apitong, keruing
(Dipterocarpus spp.)
108
avodire
(Turreanthus africanus)
109
balsa
(Ochroma pyramidale)
110
banak
(Virola spp.)
111
cativo
(Prioria copaifera)
112
cuangare
(Dialyanthera spp.)
113
greenheart
(Ocotea rodiaei)
114
iroko
(Chlorophora excelsa & C. regia)
115
lauan, dark red
(Shorea spp.)
116
lauan, light red
(Shorea spp.)
117
limba
(Terminalia superba)
118
mahogany, African
(Khaya spp.)
119
mahogany (true)
(Swietenia macrophylla)
120
obeche
(Triplochiton scleroxylon)
121
okoume
(Auocoumea klaineana)
122
Parana pine
(Araucaria angustifolia)
123
pau marfim
(Balfourodendron riedelianum)
124
primavera
(Cybistax donnell-smithii)
125
ramin
(Gonystylus spp.)
126
Spanish-cedar
(Cedrela spp.)
127
teak
(Tectona grandis)

Shrinkage coefficients and formulas from: