1. What is the Race Time Prediction Formula?

The race time prediction formula estimates how long it will take to run a target distance based on a known performance at a different distance. It accounts for the non-linear relationship between distance and running time.

2. How Does the Calculator Work?

The calculator uses the race time prediction formula:

Where:

• \( T1 \) — Known time for distance D1 (hours)
• \( D1 \) — Known distance (miles)
• \( D2 \) — Target distance (miles)
• \( T2 \) — Predicted time for distance D2 (hours)

Explanation: The exponent 1.06 accounts for the fact that running speed decreases slightly as distance increases.

3. Importance of Race Time Prediction

Details: Accurate race time prediction helps runners set realistic goals, pace themselves properly during races, and plan training programs.

4. Using the Calculator

Tips: Enter your known time in hours, known distance in miles, and target distance in miles. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this prediction formula?
A: It works best for distances between 5K and marathon. Accuracy decreases for very short sprints or ultra distances.

Q2: Why the exponent of 1.06?
A: This value comes from empirical data showing that running speed decreases by about 6% when distance doubles.

Q3: Does this account for terrain or conditions?
A: No, it assumes similar terrain and conditions for both races. Adjust predictions for hills, weather, etc.

Q4: Can I use kilometers instead of miles?
A: Yes, as long as both distances are in the same units (either both miles or both kilometers).

Q5: What if my predicted time seems unrealistic?
A: The formula works best for trained runners. Beginners or those with uneven training may get less accurate predictions.