5K in 40 minutes: Pace, Training Plan & Race Strategy | Updated Edition

Very accurate when based on a recent race result (within 8 weeks). Use a 10K or half marathon from the current training block for best results. Accuracy decreases if your fitness has changed significantly since the input time.

You need to maintain an average pace of 4:16 per kilometer (6:52 per mile) for the entire 42.195km. This requires a VO2 Max of approximately 52–55 ml/kg/min and significant marathon-specific training.

Performance declines by approximately 60 seconds per hour for every 5°C above an optimal racing temperature of 10–12°C. Racing in 25°C? Add 90–120 seconds to your per-kilometer pace compared to a cool day.

Never increase your weekly running mileage by more than 10% from one week to the next. This prevents the accumulation of training stress that leads to overuse injuries like shin splints and stress fractures.