Simply type in the "info" to find the "info" you need. Sorry, I only figured it for Miles Per Hour, but, as soon as I have time, and find the formula, maybe I will write a conversion program (If I remember correctly, there are approximately 25.4mm in an inch, multiply by 12, multiply by 5280, divide by 1000, divide by 1000 again... (anyone have a metric conversion sheet handy?...) sooooo, simply multiply 1.609344 by your MPH figure to get an approximate KM/H figure. That was fun...) Also, for simplicity (I need it as simple as I can get it...), I designed all of my calculations based on 60MPH (one mile a minute), so, if you want it figured out at a different speed, you will have to alter your figures (I could have made it more complex and had you type in a speed too, but, hey... It's my first attempt at a JavaScript program, and I had enough trouble with this one!!! ). Anyway, please also understand that this conversion does not take into account things like torque converter slippage, etc. so, your RPM may not actually be exactly as calculated here (especially if I got the formulas wrong... Let me know if you get a different result...).