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Power and Aerodynamic Drag in Cycling

  1. Fill in the information in the boxes:
    • Your Velocity (mph)
    • Wind Velocity (mph + or - for tailwind or headwind)
    • Your Weight (in pounds)
    • Angle of the Road (in degrees see conversion chart below)
  2. Click "Calculate"

Provide The Following:

Speed: Weight: Wind: Angle:





Power: Watts
Velocity: meters/sec
Drag: Newtons
Relative Speed: mph
Energy: Cals/min.



Angle to Percent Grade Conversion Table

Degree of Angle range = .1° to 45°
Percent of Grade range = .2% to 100%
Gradient range (rise:run) = 1:573 to 1:1

DEGREE
OF ANGLE
PERCENT
OF GRADE
GRADIENT
1:X
.1
0.2
573.0
.2
0.3
286.5
.3
0.5
191.0
.4
0.7
143.2
.5
0.9
114.6
.6
1.0
95.5
.7
1.2
81.8
.8
1.4
71.6
.9
1.6
63.7
1
1.7
57.3
2
3.5
28.6
3
5.2
19.1
4
7.0
14.3
5
8.7
11.4
6
10.5
9.5
7
12.3
8.1
8
14.1
7.1
9
15.8
6.3
10
17.6
5.7
11
19.4
5.1
12
21.3
4.7
13
23.1
4.3
14
24.9
4.0
15
26.8
3.7
16
28.7
3.5
17
30.6
3.3
18
32.5
3.1
19
34.4
2.9
20
36.4
2.7
21
38.4
2.6
22
40.4
2.5
23
42.4
2.4
24
44.5
2.2
25
46.6
2.1
26
48.8
2.1
27
51.0
2.0
28
53.2
1.9
29
55.4
1.8
30
57.7
1.7
31
60.1
1.7
32
62.5
1.6
33
64.9
1.5
34
67.5
1.5
35
70.0
1.4
36
72.7
1.4
37
75.4
1.3
38
78.1
1.3
39
81.0
1.2
40
83.9
1.2
41
86.9
1.2
42
90.0
1.1
43
93.3
1.1
44
96.6
1.0
45
100.0
1.0
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