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