Customer Service:

(800) 421-5830

MK Facebook Link MK Twitter Link MK Instagram Link MK Youtube Link

MK Diamond Products are available through GSA Advantage!

Product specifications subject
to change without notice.

© 2020 MK Diamond Products, Inc. 

1) Click Reset 
2) Enter all but one value 
3) Click Compute

Calculate Surface Feet Per Minute;
SFM = (Pi * Dia * RPM) / 12 
SFM = Surface Feet Per Minute 
Dia = Diameter (inches) 
RPM = Revs Per Minute 

Dia  RPM  SFM 


Convert Between Inches & Millimeters 
.03936" = 1mm     25.4mm = 1"

Inches  Millimeters


Convert From Fraction to Decimal 
(Does not go from decimal to fraction)

Fraction  Decimal 


© The Machinists' Exchange On-line. 
Used with permission.