Use the VDOT Calculator to determine your run pace zones.

Using a race time, or 30 minute time trial, to determine your optimal run training pace zones with the use of this handy VDOT Calculator

Heart Rate Zone Calculator (accurate, mobile friendly

FOUR STAR ENDURANCE - RunSmart Calculator + TrainingPeaks!

Williams Pace Calculator - Pace Calculator, Track and Road Running

New Feature: Save Custom Paces And Cross Training - V.O2 News

VDOT Running Calculator - Apps on Google Play

Explaining VDOT, and Why You Need to Know

Why running slow will make you fast :)

FOUR STAR ENDURANCE - RunSmart Calculator + TrainingPeaks!

Velocity-distance relationship implied by Jack Daniels' VDOT