1. What is a Half Marathon?

A half marathon is a road running event of 21.0975 kilometers (13.1094 miles). It's half the distance of a full marathon and is a popular challenge for runners of various skill levels.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• Pace per km — Your running pace in minutes and seconds per kilometer
• 21.0975 — Fixed half marathon distance in kilometers

Explanation: The calculator converts your pace to total minutes, multiplies by the half marathon distance, then converts back to hours:minutes:seconds format.

3. Importance of Pace Calculation

Details: Knowing your estimated finish time helps with race planning, pacing strategy, and setting realistic goals based on your training pace.

4. Using the Calculator

Tips: Enter your average pace per kilometer in minutes and seconds. The calculator will estimate your half marathon finish time.

5. Frequently Asked Questions (FAQ)

Q1: Is the half marathon distance always exactly 21.0975 km?
A: Officially, yes. However, course measurement tolerances may result in slight variations (usually < 1% difference).

Q2: How accurate is this calculator?
A: It provides a theoretical time based on constant pace. Actual race times may vary due to terrain, weather, and pacing strategy.

Q3: What's a good half marathon pace for beginners?
A: For first-timers, 6:00-7:00 min/km is common. More experienced runners often aim for 4:30-5:30 min/km.

Q4: How does elevation affect finish time?
A: Hilly courses can add 10-20% to your flat-course time. The calculator assumes flat terrain.

Q5: Can I use this for training runs?
A: Yes, it works for any distance when you know your pace, though it's optimized for half marathon distance.