how to convert rpm to mph?

Question

i was jet skiing and wondering how fast i went. it said my top speed was 7240 rpm.. what is that in MPH?

Answer 1

The truth is that there's NO correlation of RPM's to MPH. Water conditions change all the time as does, wind resistance, waves and many other factors. If you really want to see your speed, go get a water proof GPS unit and tape it to the bars. Then read the SOG (Speed Over Ground).

Answer 2

You may have been looking at the wrong gauge. RPM stands for revolutions per minute and refers to how many times the engine is turning over but you cant make a determination of how fast you were going based on rpm's. 7240 rpms is very high for an engine to be running at, so I'd say you were probably going near the jet ski's top speed.

Edit - I would say the average jet ski tops out around 65 mph.

Answer 3

There is no direct way to measure that.. large ships have conversion charts for TURNS to KNOTS but they are individual for each ship. The easiest way is to find a ONE MILE COURSE then tun iy sy 7240 RPM and CLOCK IT at the same time.. onc you have the time in seconds, then you can easily use a conversion program to read the miles per hour. You could also use a GPS to directly read out your speed or you can use a knot log trailing behind the vessle.

Answer 4

u cant convertite it. if i was to guess i was on a sedoo a few about 4 years ago that went top speed of 72 so prob with new technolgy prob about 100+ i know with the jet ski it depends on the wait alout the person driving the jet ski was trying to get to 72 but could only hit 71

Answer 5

Jet Ski Boat Conversion

Answer 6

If it was a car with a final drive ratio of 1:1, and the drive wheels had a diameter of one mile, then the conversion would be:



7240 RPM * 60MIn/HR * 3.14miles/revolution = 1,364,016 miles/hr or .0002 light speed.



Hope this helps.