Sub 20 minute 5K pace: 4:00 per kilometre

• 20:00 4:00 /km
•   6:26 /mi

Splits

Splits assume an even pace — they show what an even race looks like, not a pacing strategy. Going out faster or slower than these numbers is a choice, and one that costs more than it usually gains.

Training paces

Training paces are derived from Daniels' Running Formula (4th edition (2021)) with the Daniels–Gilbert oxygen-cost equations. VDOT is back-calculated from a race result, not measured.

Equivalent VDOT: 49.8

Twenty minutes for five kilometres is the first 5K target that is not really about finishing. It is 4:00 per kilometre, or 6:26 per mile, held for twenty minutes — a pace most runners can reach for one kilometre long before they can hold it for five.

What this pace actually asks

The gap between a fast kilometre and a fast 5K is not fitness in the abstract; it is how long you can sit at a pace that is uncomfortable but not sprinting. At 4:00/km you are running hard enough that talking is over, but not so hard that you are counting down to the finish from the first minute. The failure mode of a sub-20 attempt is almost never "could not run 4:00"; it is "ran the first kilometre in 3:45 and paid for it".

Two numbers on this page describe that demand more precisely:

• The equivalent VDOT in the training table above is back-calculated from 20:00 over 5 km. It is a way of comparing this target with a half marathon or a marathon time, not a measurement of anything in your body.
• The training paces are derived from that same number. They are what you actually train at: the target pace is a race pace, and racing it three times a week is a good way to arrive at the start line tired.

How the race should look

The splits table above is an even-pace plan: each kilometre takes the same time, and the table shows where you should be at 1, 2, 3 and 4 km. Use it as a reference, not a straitjacket. What it protects you from is the specific mistake that ruins more sub-20 attempts than fitness does — being five seconds per kilometre ahead at halfway and twenty seconds behind by the finish.

If you want one tactical idea rather than none: aim to be on the target splits for the first two kilometres, then let the last kilometre be whatever it is. The final kilometre of a well-paced 5K is usually the fastest one, and it is usually the only one where you should be thinking about the clock at all.

Training for it

Most of the work is slower than 4:00/km. The intensities in the table above are the ones to spend volume on:

• Easy running builds the base that lets you hold a hard pace for twenty minutes. It should feel conversational, and most weeks it is the majority of your running.
• Threshold work — roughly the pace you could hold for an hour — teaches the body to clear what hard running produces. In a 5K block this is the session that moves the number most reliably.
• Interval work at around 5K pace or a little faster sharpens the top end. A classic session is repetitions of 800 m or 1 km at goal pace with short recoveries, and its purpose is pace discipline as much as fitness.

If you race a 5K and the time is close but not there, the honest diagnosis is usually visible in the splits: an even race that fades in the last kilometre is a fitness gap, while a race that is fast early and slow in the middle is a pacing gap. The two have different fixes.

Common questions

Target times and the pace they need

Next

• All target times for this distance
• Pace calculator
• VDOT calculator and training paces