Half Marathon Pace Calculator

Calculate your perfect half marathon pace for 21.1K races. Get detailed split times, training zones, and race strategy for your half marathon preparation.

21.1K Half Marathon Pace Calculator

Calculate Your Half Marathon Pace

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Calculate Half Marathon Finish Time

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Half Marathon Goal Time Strategy

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Half Marathon Training Pace Zones

Easy Pace

60-70% of weekly mileage

Build aerobic base and endurance

Calculate your pace above

Tempo Pace

Comfortably hard effort

Improve lactate threshold

Calculate your pace above

Half Marathon Pace

Target race pace

Race-specific preparation

Calculate your pace above

Interval Pace

Short, fast efforts

Improve VO2 max and speed

Calculate your pace above

Half Marathon Pace Calculator Guide

How to Use Our Half Marathon Pace Calculator

Our half marathon pace calculator is specifically designed for the 21.1K distance, providing accurate pace calculations, detailed split times, and comprehensive training zones for half marathon preparation.

Half Marathon Pacing Strategy

Successful half marathon pacing requires strategic planning. Our 21.1K pace calculator helps you:

  • Calculate your target half marathon pace based on goal time
  • Generate 5K split times for race day execution
  • Determine training paces for different workout types
  • Plan even pacing or negative split strategies

Half Marathon Training Paces

Different training runs require specific paces for optimal half marathon preparation:

  • Easy Runs: 60-90 seconds slower than half marathon pace
  • Long Runs: 30-45 seconds slower than half marathon pace
  • Tempo Runs: 10-20 seconds faster than half marathon pace
  • Half Marathon Pace Runs: Exact target race pace
  • Interval Training: 15-30 seconds faster than half marathon pace

Race Day Execution

Use our half marathon split times to execute your race strategy:

  • Start conservatively in the first 5K
  • Settle into target pace by 8K
  • Maintain steady effort through 15K
  • Push slightly in the final 5K if feeling strong

Common Half Marathon Pace Targets

Popular half marathon time goals and their required paces:

  • Sub-1:30 Half Marathon: 4:15/km (6:51/mile)
  • Sub-1:45 Half Marathon: 4:58/km (8:00/mile)
  • Sub-2:00 Half Marathon: 5:41/km (9:09/mile)
  • Sub-2:15 Half Marathon: 6:23/km (10:17/mile)
  • Sub-2:30 Half Marathon: 7:06/km (11:26/mile)

Half Marathon vs Other Distances

The half marathon requires different pacing than other distances:

  • Half marathon pace is typically 10-15 seconds per km slower than 10K pace
  • More emphasis on aerobic endurance vs pure speed
  • Requires sustained effort over longer distance
  • Good stepping stone to marathon training

Get Your Personalized Half Marathon Training Plan

Take your half marathon preparation to the next level with a customized 12-16 week training plan designed specifically for your goal time and fitness level.

  • ✓ Personalized half marathon pace targets
  • ✓ Progressive weekly mileage build-up
  • ✓ Race-specific long run schedule
  • ✓ Tempo and threshold workouts
  • ✓ Tapering and peak strategy

For the price of a coffee - £2.99