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Trees Per Acre by Spacing

Spacing		Trees		Spacing		Trees
Feet	Meters	Acre	Ha.	Feet	Meters	Acre	Ha.
5 x 5	1.5 x 1.5	1,742	4,304
5 x 6	1.5 x 1.8	1,452	3,588	12 x 12	3.7 x 3.7	302	746
5 x 7	1.5 x 2.1	1,245	3,076	12 x 15	3.7 x 4.6	242	598
5 x 8	1.5 x 2.4	1,089	2,691	12 x 18	3.7 x 5.5	202	499
5 x 9	1.5 x 2.7	968	2,392	12 x 20	3.7 x 6.1	182	448
5 x 10	1.5 x 3.0	871	2,152	12 x 25	3.7 x 7.6	145	358

6 x 6	1.8 x 1.8	1,210	2,990	13 x 13	4.0 x 4.0	258	638
6 x 7	1.8 x 2.1	1,037	2,562	13 x 15	4.0 x 4.6	223	551
6 x 8	1.8 x 2.4	908	2,244	13 x 20	4.0 x 6.1	168	415
6 x 9	1.8 x 2.7	807	1,994	13 x 25	4.0 x 7.6	134	331
6 x 10	1.8 x 3.0	726	1,794
6 x 12	1.8 x 3.7	605	1,495	14 x 14	4.3 x 4.3	222	549
6 x 15	1.8 x 4.6	484	1,196	14 x 15	4.3 x 4.6	207	511

Service Forester's Handbook