How's your SWR? A SWR Chart & Graphic

As everyone knows, the higher your SWR (Standing Wave Ratio) the less efficient your antenna is. I searched everywhere on the internet internet looking for a Chart or Excel spreadsheet that would tell me the power loss to expect for a given SWR. I own an Array Solutions AIM-4170b Antenna Analyzer, so I set out to create my own chart, as I have a bunch of antennas at my QTH, and I have several friends with antennas. I wanted to scan as many antennas as possible.

After scanning about a dozen HF antennas, I put the data into Excel and let Excel do it's magic.

So here is a Chart showing how SWR effects how much power you actually radiate from your antenna.

SWR	%Reflected Power	% Power Out
1.10	0.11	99.89
1.20	0.52	99.48
1.30	1.35	98.65
1.40	2.37	97.63
1.50	3.80	96.20
1.60	4.92	95.08
1.70	7.10	92.90
1.80	7.56	92.44
1.90	9.22	90.78
2.00	10.71	89.29
2.10	11.91	88.09
2.20	13.53	86.47
2.30	15.11	84.89
2.40	16.99	83.01
2.50	18.61	81.39
2.60	19.11	80.89
2.70	20.71	79.29
2.80	22.18	77.82
2.90	23.11	76.89
3.00	24.91	75.09
3.10	25.92	74.08
3.20	27.12	72.88
3.30	28.30	71.70
3.40	29.62	70.38
3.50	30.72	69.28
3.60	31.80	68.20
3.70	32.68	67.32
3.80	33.82	66.18
3.90	34.98	65.02
4.00	35.73	64.27
4.10	36.69	63.31
4.20	37.81	62.19
4.30	38.46	61.54
4.40	39.21	60.79
4.50	40.08	59.92
4.60	41.02	58.98
4.70	41.92	58.08
4.80	42.55	57.45
4.90	43.39	56.61
5.00	44.25	55.75
5.10	44.95	55.05
5.20	45.56	54.44
5.30	46.26	53.74
5.40	46.93	53.07
5.50	47.63	52.37
5.60	48.35	51.65
5.70	49.03	50.97
5.80	49.58	50.42
5.90	50.56	49.44
6.00	51.11	48.89
6.10	51.67	48.33
6.20	51.90	48.10
6.30	52.49	47.51
6.40	53.11	46.89
6.50	53.89	46.11
6.60	54.09	45.91
6.70	54.56	45.44
6.80	55.06	44.94
6.90	55.67	44.33
7.00	56.13	43.87
7.10	56.54	43.46
7.20	57.05	42.95
7.30	57.46	42.54
7.40	58.02	41.98
7.50	58.31	41.69
7.60	58.73	41.27
7.70	59.16	40.84
7.80	59.59	40.41
7.90	59.92	40.08
8.00	60.31	39.69
8.10	60.71	39.29
8.20	61.09	38.91
8.30	61.44	38.56
8.40	61.80	38.20
8.50	62.23	37.77
8.60	62.61	37.39
8.70	62.85	37.15
8.80	63.21	36.79
8.90	63.72	36.28
9.00	63.85	36.15
9.10	64.20	35.80
9.20	64.53	35.47
9.30	64.82	35.18
9.40	65.18	34.82
9.50	65.39	34.61
9.60	65.95	34.05
9.70	65.97	34.03
9.80	66.40	33.60
9.90	66.56	33.44
10.00	66.87	33.13
10.10	67.31	32.69
10.20	67.38	32.62
10.30	67.66	32.34
10.40	67.95	32.05
10.50	68.22	31.78
10.60	68.45	31.55
10.70	68.67	31.33
10.80	68.86	31.14
10.90	69.12	30.88
11.00	69.34	30.66
11.10	69.68	30.32
11.20	69.98	30.02
11.30	70.09	29.91
11.40	70.35	29.65
11.50	70.58	29.42
11.60	70.88	29.12
11.70	71.03	28.97
11.80	71.09	28.91
11.90	71.35	28.65
12.00	71.53	28.47
12.10	71.70	28.30
12.20	71.90	28.10
12.30	72.16	27.84
12.40	72.34	27.66
12.50	72.51	27.49
12.60	72.67	27.33
12.70	72.92	27.08
12.80	73.03	26.97
12.90	73.21	26.79
13.00	73.40	26.60
13.10	73.58	26.42
13.20	73.73	26.27
13.30	74.02	25.98
13.40	74.10	25.90
13.50	74.25	25.75
13.60	74.43	25.57
13.70	74.59	25.41
13.80	74.75	25.25
13.90	74.92	25.08
14.00	75.06	24.94
14.10	75.20	24.80
14.20	75.35	24.65
14.30	75.50	24.50
14.40	75.64	24.36
14.50	75.82	24.18
14.60	75.94	24.06
14.70	76.12	23.88
14.80	76.28	23.72
14.90	76.43	23.57
15.00	76.50	23.50
15.10	76.65	23.35
15.20	76.86	23.14
15.30	77.01	22.99
15.40	77.07	22.93
15.50	77.20	22.80
15.60	77.35	22.65
15.70	77.49	22.51
15.80	77.60	22.40
15.90	77.78	22.22
16.00	77.82	22.18
16.20	78.10	21.90
16.30	78.23	21.77
16.40	78.28	21.72
16.50	78.39	21.61
16.60	78.59	21.41
16.70	78.68	21.32
16.80	78.77	21.23
16.90	78.89	21.11
17.00	79.00	21.00
17.10	79.09	20.91
17.20	79.18	20.82
17.30	79.30	20.70
17.40	79.40	20.60
17.50	79.51	20.49
17.60	79.68	20.32
17.70	79.75	20.25
17.80	79.81	20.19
17.90	79.91	20.09
18.00	80.01	19.99
18.10	80.11	19.89
18.20	80.23	19.77
18.30	80.31	19.69
18.40	80.41	19.59
18.50	80.51	19.49
18.60	80.59	19.41
18.70	80.68	19.32
18.80	80.84	19.16
18.90	80.94	19.06
19.00	80.99	19.01
19.10	81.09	18.92
19.20	81.14	18.86
19.30	81.23	18.77
19.40	81.36	18.64
19.50	81.40	18.60
19.60	81.48	18.52
19.70	81.58	18.42
19.80	81.70	18.30
19.90	81.75	18.25
20.00	81.83	18.17
20.10	81.93	18.07
20.20	82.03	17.97
20.30	82.07	17.93
20.40	82.17	17.83
20.60	82.32	17.68
20.70	82.41	17.59
20.80	82.46	17.54
20.90	82.56	17.44
21.00	82.61	17.39
21.20	82.76	17.24
21.30	82.85	17.15
21.40	82.97	17.03
21.50	82.98	17.02
21.60	83.09	16.91
21.90	83.32	16.68
22.10	83.45	16.55
22.20	83.53	16.47
22.40	83.63	16.37
22.50	83.67	16.33
22.80	83.89	16.11
22.90	83.99	16.01
23.00	84.04	15.96
23.10	84.10	15.90
23.30	84.24	15.76
23.50	84.35	15.65
23.60	84.38	15.62
23.80	84.51	15.49
23.90	84.59	15.41
24.00	84.64	15.36
24.10	84.68	15.32
24.20	84.75	15.25
24.30	84.81	15.19
24.60	84.98	15.02
25.20	85.31	14.69
25.40	85.44	14.56
25.50	85.46	14.54
25.80	85.61	14.39
25.90	85.69	14.31
26.40	85.94	14.06
26.70	86.07	13.93
26.80	86.12	13.88
26.90	86.19	13.81
27.20	86.31	13.69
27.90	86.64	13.36
28.00	86.66	13.34
28.20	86.79	13.21
28.70	86.99	13.01
29.00	87.11	12.89
29.70	87.38	12.62
29.90	87.46	12.54
30.20	87.57	12.43
30.60	87.75	12.25
30.80	87.83	12.17
31.40	88.02	11.98
32.60	88.45	11.55
33.00	88.58	11.42
33.20	88.65	11.35
33.60	88.77	11.23
34.90	89.17	10.83
35.10	89.24	10.76
36.10	89.51	10.49
37.60	89.90	10.10
38.10	90.02	9.98
39.20	90.29	9.71
40.40	90.58	9.42
40.60	90.63	9.37
42.40	90.99	9.01
43.40	91.19	8.81
43.60	91.23	8.77
44.10	91.33	8.67
46.70	91.79	8.21
47.00	91.85	8.15
48.80	92.13	7.87
50.90	92.45	7.55
51.00	92.45	7.55
52.10	92.61	7.39
54.00	92.86	7.14
55.70	93.07	6.93
57.10	93.23	6.77
57.30	93.26	6.74
59.30	93.48	6.52
61.10	93.66	6.34
65.40	94.07	5.93
66.40	94.15	5.85
69.90	94.43	5.57
71.30	94.54	5.46
73.00	94.67	5.33
74.80	94.79	5.21
81.30	95.20	4.80
82.00	95.24	4.76
86.90	95.50	4.50
88.70	95.59	4.41
96.90	95.95	4.05
104.30	96.24	3.76
112.90	96.52	3.48
114.90	96.58	3.42
115.00	96.58	3.42
122.60	96.79	3.21
136.10	97.10	2.90
144.30	97.27	2.73
146.70	97.31	2.69
166.50	97.63	2.37
191.40	97.93	2.07
210.00	98.11	1.89
225.70	98.24	1.76
256.10	98.45	1.55
261.50	98.48	1.52

How's Your SWR?