Sub-1:20 10K

Mile-by-mile splits for 1:20:00

A 10K gives you no room for a strategic error and just enough room for a tactical one. The even-split table holds 12:52 per mile to a 1:20:00 finish, with 40:00 at 5K. The most common way to miss this goal is to run the first mile eight seconds fast and spend miles four through six paying for it at compound interest.

The negative-split table opens at 13:00 per mile, turns 5K in 40:24, then closes at 12:45. For most runners this is the higher-percentage race: the opening pace feels controlled rather than committed, and the finish is a decision you get to make rather than one made for you.

Even splits — 12:52 per mile

Even pacing: 12:52 per mile for all 6.2 miles, finishing in 1:20:00.

Slight negative split — 13:00 out, 12:45 home

One percent either side of even: 13:00 per mile through halfway (40:24), then 12:45 home. Same 1:20:00 finish. The mile that straddles halfway blends both paces.

Per kilometre — 8:00 per km

Even pacing in metric: 8:00 per kilometre across 10.0 km.

Are you ready for a sub-1:20 10K?

Equivalent times are computed from the rounded VDOT of 22.8, so the 10K row lands within a few seconds of 1:20:00 rather than exactly on it. That is rounding, not a different prediction.

To break 1:20:00 you need 12:52 per mile, and you should be racing about a 38:25 5K, which projects to a 2:56:21 half marathon. Those are checkpoints, not entry requirements — the 10K back here is less about the speed you own than about how evenly you can spread it across 6.2 miles.

The detail worth knowing: your race pace of 12:52 sits within a handful of seconds of your threshold pace of 12:45, and you will be out there holding it for a long time. That is the whole game — an extended negotiation with a pace that never feels free. The preparation is friendly, though: steady tempo work near 12:45, easy days honestly easy at 15:08, and one run a week that simply lasts longer than the race will. Do that for a season and 1:20:00 stops being a barrier and becomes a split.

Sub-1:20 is the ladder's final rung and its plainest promise: eighty minutes of forward motion, 8:00 per kilometre — eight flat — and a finish line with your number on it. Every measurement on this page scales honestly down to it: the same VDOT engine (22.8), the same even-split logic (40:00 at 5K), the same training table led by easy miles at 15:08. What it certifies is not speed but continuity — the habit of moving for more than an hour on purpose — and continuity is the raw material every other rung on this ladder is refined from. The next one up costs five minutes; the habit is already paid for.

Where do you stand right now?

Enter a race you have actually run and this will tell you where you stand against the 22.8 VDOT a sub-1:20 10K requires — your score, the target, and the gap. Nothing is stored or sent anywhere.

Training paces for a sub-1:20 10K

These are day-one paces for the 22.8 VDOT behind a sub-1:20 10K. The one that matters most is the easy pace of 15:08 per mile — slower than you think it should be, and the single biggest reason people arrive on race day healthy instead of injured.

Easy pace is a range rather than a point — Daniels defines it as 59–74% of VO₂max, which for the fitness behind a sub-1:20 10K runs from 14:31 to 17:07 per mile. The single easy figure below is the 70% value.

Sub-1:20 10K FAQ