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

Running Lactate Threshold Test: 30 Minute Field Test Protocol

What marathon time do you think I could get based on my half

Projected half time : r/Marathon_Training

Tri Training Harder: Run Testing - Calculating your VDOT Pace and

STRYD Community, I love running by VDOT

Jack Daniels Running Calculator - Predict your results in races

Calculate Your Training Paces - The VDot System

Runner's Projection Utilities (and other cool stuff)

Running RPE correlation with pace and Heart Rate - Training