Miles per hour to Fujita rating (1971)
Type a value in mph to get it in F scale instantly.
F3F scale
That's 1.35× as strong as a strong EF2 tornado, while a violent EF4 tornado is 1.1× stronger.
Convert the other way: F scale to mph
What it means
How strong is that tornado?
EF uses three-second gusts and the old F-scale fastest-quarter-mile winds, so the same rating number means different speeds. Ratings are estimated from damage.
The math
How to convert mph to F scale
EF ratings are gust bands: EF0 = 65–85 mph, EF1 = 86–110, EF2 = 111–135, EF3 = 136–165, EF4 = 166–200, EF5 over 200. TORRO: v = 2.365 × (T + 4)^1.5 m/s.
Example: 166 mph = F3 F scale.
Every unit
That tornado on every scale
Tables
mph to F scale conversion table
| mph | F scale |
|---|---|
| 65 mph | F0 F scale |
| 86 mph | F1 F scale |
| 111 mph | F1 F scale |
| 136 mph | F2 F scale |
| 166 mph | F3 F scale |
| 201 mph | F3 F scale |
F scale to mph conversion table
| F scale | mph |
|---|---|
| F1 F scale | 73 mph |
| F2 F scale | 113 mph |
| F3 F scale | 158 mph |
| F4 F scale | 207 mph |
Quick answers
Quick answers
- How many F scale is 1 mph?
- 1 mph is below F0 F scale.
- How many F scale is 10 mph?
- 10 mph is below F0 F scale.
- How many F scale is 166 mph?
- 166 mph is F3 F scale.
The units
About these units
Miles per hour (mph)
Wind speed in mph.
Fujita rating (1971) (F scale)
The original F0 to F5 scale.
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