Speed calculator?

[Fordulike]

Anyone got a handy calculator or link, to find out real world speed from the RPM figure of a 26" wheel?

 

[flecc]

Just multiply the revs by 0.0773:

e.g. 200 revs x 0.0773 = 15.46 mph

For a nominal 28" wheel (700c etc), multiply by 0.0833

To adjust the calculation to an exact diameter, divide the above multipliers by the 26" or 28" and multiply by the actual diameter.
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[Fordulike]

Just the ticket, thanks flecc.