It depends how old you are. If your a running back in College or Pro's it's not that fast at all. Most of these athletics run anywhere from 4.2 to 4.6.
A 10 yard dash time is really not a good judge of your speed, the distance is too short. A 40 yard dash is what you need to get a good estimate of your abilities. but I'll give you time for both 40 yard dash-between 5-5.8 seconds 10 yard dash-between 1.3-1.5 seconds
14 seconds
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A 12.5-second 100m equates to a time of 4.572 seconds in the 40-yard dash.
Jake Plummer's 40 yard dash time is 4.76 seconds. He is in the Air Force.
His time at the combine prior to his rookie season was a 4.64 seconds 40 yard dash.
4.5 seconds or lower
A rough estimate would be around 4.3-4.4 seconds for the 40 yard dash when converting a 11.5 second 100 meter dash time.
Walter Payton 40 yard dash time was 3.90 seconds.
Walter Payton 40 yard dash time was 3.90 seconds.
Usain bolt runs his 40 yard dash in around 4.2 seconds.
4.75 seconds