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 Fifty Plus (50+) Share the victories, challenges, successes and special concerns of bicyclists 50 and older. Especially useful for those entering or reentering bicycling.

 06-16-05, 09:37 PM #1 LastPlace Senior Member Thread Starter   Join Date: Jun 2005 Bikes: Posts: 776 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) There is a saying that if you remember the '70s you were not there and one of the many things I don't remember is math. Since my computer doesn't average speed does anybody have a formula that lets me enter milage and time to get an average or does anyone know where I can find a chart. For example, Tuesday we did 20 miles in 1hr, 36 minutes and today we did the same 20 miles in 1hr and 15 minutes. How does an aged brain do the math? LastPlace
 06-16-05, 10:12 PM #2 Digital Gee I need more cowbell.     Join Date: Jun 2005 Location: Reno, Nevada Bikes: 2015 Specialized Sirrus Elite, 2012 Masi Evoluzione Posts: 8,111 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 2 Post(s) The first time, you rode an average of 12.5 mph. The second, you rode an average of 16. In the first instance, you rode 1.6 hours (36 minutes = .6 of an hour), and in the second run, you rode 1.25 hours. Divide both by 20 miles and you'll get these results. And avoid appearing on NPR's Whatdya Know, with Michael Feldman, because you will get the question wrong if the category is Things You Should Have Learned in School. :-) __________________ 2015 Sirrus Elite 2012 Masi Evoluzione Proud member of the original Club Tombay
 06-16-05, 10:21 PM #3 Longhorn Burnt Orange Blood     Join Date: Apr 2005 Location: Dripping Springs, Texas Bikes: Trek 7200, Lashout Electric Bike, Raleigh Talon Posts: 825 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) The formula is Distance = Rate*Time. So you can divide the distance by the time (in hours, since you want miles per hour) to solve for the rate. (Just a generalization of the calculators that Digital Gee did for you. I teach math so I couldn't resist. )
 06-16-05, 10:37 PM #4 JavaMan Senior Member     Join Date: Sep 2004 Location: Southern California Bikes: 2013 KHS Flite 747 Posts: 1,068 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) This spreadsheet may be easier for you to use.
 06-17-05, 05:53 AM #5 RonH Life is good     Join Date: Jan 2001 Location: Not far from the Withlacoochee Trail. 🚴🏻 Bikes: 2001 Litespeed Tuscany and 2014 Cannondale SuperSix EVO Hi-Mod Posts: 17,691 Mentioned: 8 Post(s) Tagged: 0 Thread(s) Quoted: 382 Post(s) Example: time = 2 hours and 17 minutes. distance = 38.6 miles First convert the hours (2 hours) to minutes by multiplying them by --> 60. 2x60=120 Then add the minutes (17 minutes) to that number. --> 120+17=137 Now divide by 60 to get the decimal equivalent. --> 137/60=2.283 Now divide the miles (38.6 miles) by the time (2.283). --> 38.6/2.283=16.9 mph __________________ The LORD is merciful and gracious, slow to anger, and plenteous in mercy. - Psalm 103:8
 06-17-05, 12:10 PM #6 LastPlace Senior Member Thread Starter   Join Date: Jun 2005 Bikes: Posts: 776 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) Thanks folks. It's all coming back to me.....at least I think so. LastPlace
 06-19-05, 08:54 AM #7 Garfield Cat Senior Member     Join Date: Oct 2004 Location: Huntington Beach, CA Bikes: Cervelo Prodigy Posts: 6,435 Mentioned: 2 Post(s) Tagged: 0 Thread(s) Quoted: 157 Post(s) The easiest thing to do is to buy a new cyclometer. They're relatively inexpensive for the low end models and you should be able to get the average speed feature with it. Today is Father's day and maybe you'll get one today. If not, whatever you get, exchange it for a new cyclometer.
 06-26-05, 09:05 PM #8 LastPlace Senior Member Thread Starter   Join Date: Jun 2005 Bikes: Posts: 776 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) Garfield, Thanks for the reply. I have had a basic Sigma for the last year but it did not have an average speed function. Last night I put on my TOPEAK Panoram V12 and so far so good, and yes it does have an average speed function. Eighteen miles at 11.8 mph. Nice easy ride. LastPlace
 07-02-05, 02:18 AM #9 chroot Newbie Extraordinaire   Join Date: Jul 2004 Location: Just outside San Fransicsco Bikes: Trek 1000 Posts: 556 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) Let me introduce you to the google calculator, which is perfect for doing math with various units. If you want to know your average speed, go to www.google.com and type in "20 miles / 96 minutes in mph" and hit enter. Click this link to see what it looks like: http://www.google.com/search?hl=en&l...ph&btnG=Search - Warren
 07-02-05, 06:35 PM #10 jjj606 Junior Member   Join Date: Jun 2005 Location: ohio Bikes: Posts: 16 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) Yes, google calculator is the way to go. "20 miles / 1 hour 36 minutes in mph" also works. "15 mph in feet per second" = 22 feet per second "1 3/8 inches in mm" = 34.925 mm
 07-02-05, 08:44 PM #11 LastPlace Senior Member Thread Starter   Join Date: Jun 2005 Bikes: Posts: 776 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) Thanks for the help. I bought a Panoram v12 and it does all the math for me, i.e. it averages speed but thanks again. LastPlace

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