WI-FI  RANGE TABLE
Approximate RANGE versus ANTENNA GAIN for 802.11 Wi-Fi / WLAN systems
1.  Referenced to a full bandwidth connection speed at a specification distance of 30 metres using standard half-wave dipole antenna.
2.  At the slowest connection speed of 1 - 2Mbps, the effective range will be multiplied around 10 times.
Single	Single	Linear	Equivalent	Link	Required	Antenna	Notional Rain
Antenna	Antenna	Range	Link	Power	Antenna	pair	Attenuation
Range	Range	Magnification	Power Gain	increase	gain	point (p2p)	in path
(metres)	(Miles)	(x times)	(Watts)	(x times)	(dBi)	(dBi)	(dB)
30	0.02	1	0.1	0	2.4	2.4	-
60	0.04	2	0.4	4	8.4	4.2	-
90	0.06	3	0.9	9	11.9	6.0	-
120	0.07	4	1.6	16	14.4	7.2	-
150	0.09	5	2.5	25	16.4	8.2	-
180	0.11	6	3.6	36	18.0	9.0	-
210	0.13	7	4.9	49	19.3	9.7	-
240	0.15	8	6.4	64	20.5	10.2	-
270	0.17	9	8.1	81	21.5	10.7	-
300	0.19	10	10	100	22.4	11.2	-
330	0.21	11	12.1	121	23.2	11.6	-
360	0.22	12	14.4	144	24.0	12.0	-
390	0.24	13	16.9	169	24.7	12.3	-
420	0.26	14	19.6	196	25.3	12.7	-
450	0.28	15	22.5	225	25.9	13.0	-
480	0.30	16	25.6	256	26.5	13.2	-
510	0.32	17	28.9	289	27.0	13.5	-
540	0.34	18	32.4	324	27.5	13.8	-
570	0.35	19	36.1	361	28.0	14.0	-
600	0.37	20	40	400	28.4	14.2	-
630	0.39	21	44	441	28.8	14.4	-
660	0.41	22	48	484	29.2	14.6	-
690	0.43	23	53	529	29.6	14.8	-
720	0.45	24	58	576	30.0	15.0	-
750	0.47	25	63	625	30.4	15.2	-
780	0.48	26	68	676	30.7	15.3	-
810	0.50	27	73	729	31.0	15.5	-
840	0.52	28	78	784	31.3	15.7	-
870	0.54	29	84	841	31.6	15.8	-
900	0.56	30	90	900	31.9	16.0	-
930	0.58	31	96	961	32.2	16.1	-
960	0.60	32	102	1024	32.5	16.3	-
990	0.62	33	109	1089	32.8	16.4	-
1,000	0.62	33.3	111	1,111	32.9	16.4	-
1,140	0.71	38.0	144	1,444	34.0	17.0	-
1,450	0.90	48.3	234	2,336	36.1	18.0	-
2,000	1.24	67	444	4,444	38.9	19.4	-
5,000	3.11	167	2,778	27,778	46.8	23.4	-
10,000	6.21	333	11,111	111,111	52.9	26.4	0.5
15,000	9.32	500	25,000	250,000	56.4	28.2	0.8
20,000	12.43	667	44,444	444,444	58.9	29.4	1.0
25,000	15.53	833	69,444	694,444	60.8	30.4	1.3
30,000	18.64	1000	100,000	1,000,000	62.4	31.2	1.5
35,000	21.75	1167	136,111	1,361,111	63.7	31.9	1.8
40,000	24.85	1333	177,778	1,777,778	64.9	32.4	2.0
45,000	27.96	1500	225,000	2,250,000	65.9	33.0	2.3
50,000	31.07	1667	277,778	2,777,778	66.8	33.4	2.5
55,000	34.18	1833	336,111	3,361,111	67.7	33.8	2.8
57,160	35.52	1905	363,030	3,630,295	68.0	34.0	2.9
60,000	37.28	2000	400,000	4,000,000	68.4	34.2	3.0
65,000	40.39	2167	469,444	4,694,444	69.1	34.6	3.3
70,000	43.50	2333	544,444	5,444,444	69.8	34.9	3.5
75,000	46.60	2500	625,000	6,250,000	70.4	35.2	3.8
80,000	49.71	2667	711,111	7,111,111	70.9	35.5	4.0
85,000	52.82	2833	802,778	8,027,778	71.4	35.7	4.3
Henry O'Tani G8OTA - Sept 2015