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This help page is a guide to tropical cyclone wind conversions between knots, miles per hour (mph), and kilometers per hour (km/h), three ways to measure wind intensity. Also, it provides the resulting Accumulated Cyclone Energy (ACE) from a storm of that intensity. When entering a windspeed into a template, use knots as the number to get the correct wind speed in mph and/or kph. The following table displays all conversions up to 215 mph. To request further conversion/template help, please contact an admin.

Knots MPH KM/H ACE Strength
20 25 35 0 Depression
25 30 45 0 Depression
30 35 55 0 Depression
35 40 65 0.1225 Storm
40 45 75 0.1600 Storm
45 50 85 0.2025 Storm
50 60 95 0.2500 Storm
55 65 100 0.3025 Storm
60 70 110 0.3600 Storm
65 75 120 0.4225 Category 1
70 80 130 0.4900 Category 1
75 85 140 0.5625 Category 1
80 90 150 0.6400 Category 1
85 100 155 0.7225 Category 2
90 105 165 0.8100 Category 2
95 110 175 0.9025 Category 2
100 115 185 1.0000 Category 3
105 120 195 1.1025 Category 3
110 125 205 1.2100 Category 3
115 130 215 1.3225 Category 4
120 140 220 1.4400 Category 4
125 145 230 1.5625 Category 4
130 150 240 1.6900 Category 4
135 155 250 1.8225 Category 4
140 160 260 1.9600 Category 5
145 165 270 2.1025 Category 5
150 175 280 2.2500 Category 5
155 180 285 2.4025 Category 5
160 185 295 2.5600 Category 5
165 190 305 2.7225 Category 5
170 195 315 2.8900 Category 5
175 200 325 3.0625 Category 5
180 205 335 3.2400 Category 5
185 215 345 3.4225 Category 5

Table originally from Money Hurricane/Sandbox.