1. What is a Half Marathon?

A half marathon is a road running event of 21.0975 kilometers (13.1094 miles) - exactly half the distance of a full marathon. It's a popular challenge for both beginner and experienced runners.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Distance \) — 21.0975 km or 13.1094 miles
• \( Pace \) — Your running pace (minutes per km or mile)
• \( Time \) — Estimated finish time in hours

Explanation: The calculator converts your pace to hours, then multiplies by the half marathon distance to estimate your total finish time.

3. Importance of Pace Calculation

Details: Knowing your estimated finish time helps with race strategy, pacing, and setting realistic goals. It's essential for proper training and race day planning.

4. Using the Calculator

Tips: Enter your average pace per km or mile. The pace should be based on your recent training runs or race performances. All values must be valid (minutes 0-59, seconds 0-59).

5. Frequently Asked Questions (FAQ)

Q1: 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 race conditions.

Q2: What's a good half marathon time?
A: For beginners, 2:00-2:30 hours is common. Competitive runners aim for under 1:30, while elite runners finish in about 1:10.

Q3: Should I use km or mile pace?
A: Use whichever unit you're more comfortable with. Most training plans use one consistent unit.

Q4: How does elevation affect finish time?
A: Hilly courses can significantly impact your time. Add 1-2% time per 100m of elevation gain.

Q5: Can I use this for full marathon estimation?
A: For full marathon, double your half time and add 10-20% for the "marathon effect" of longer distance.