1. What is the Galloway Magic Mile?

The Galloway Magic Mile is a predictor developed by Olympian Jeff Galloway to estimate marathon finish time based on a one-mile time trial. It accounts for the typical slowdown that occurs over longer distances.

2. How Does the Calculator Work?

The calculator uses the Galloway formula:

Where:

• \( mile\_min \) — Your best recent one-mile time (minutes)
• 2.2 — Multiplier accounting for distance and fatigue
• 33 — Constant adjustment factor

Explanation: The formula predicts your marathon time by scaling your mile time and adding a constant to account for the increased distance.

3. Importance of Magic Mile Calculation

Details: This calculation helps runners set realistic marathon goals and pacing strategies based on current fitness level.

4. Using the Calculator

Tips: Enter your best recent one-mile time in minutes. For accurate results, run the mile at maximum effort on a track or measured course.

5. Frequently Asked Questions (FAQ)

Q1: How recent should the mile time be?
A: Ideally within the last 2-4 weeks of your planned marathon for most accurate prediction.

Q2: Does this work for half marathons?
A: No, this formula is specifically designed for full marathon prediction.

Q3: How accurate is this prediction?
A: It's a general estimate - actual performance depends on training, conditions, and race strategy.

Q4: Should I use treadmill mile times?
A: Outdoor measured courses give more accurate predictions than treadmill times.

Q5: Does this account for walk breaks?
A: Yes, the formula works for run-walk strategies as it's based on your actual mile performance.