Result Breakdown: everything one time says
Type a race and a time — or open one of your runs — and see pace, predictions, VO2max, training paces, splits and what heat did, on one page.
Most questions runners bring here start from a single result. "I ran a 10K in 50:00 — what does that mean for the half? How fast should my easy runs be? What would it have been without the heat?" Until now each answer lived in a different calculator. Result Breakdown puts them on one page.
One result, everything it says
Pick a race and a time — say, a 10K in 50:00 — and the page answers: your pace and speed, what the same effort predicts for the other distances, your estimated VO2max and what level it is, the training paces it supports, the splits to run it evenly (or with a negative split), and what the same effort costs on a warm or a hot morning. Most blocks open the full calculator, already filled in, if you want to change something. It is the new Calculate tab on the phone.
Your own details, kept on your phone
Fold open Extra info and add your age, sex, maximum heart rate, and the temperature and altitude of the race. You get your age grade, your heart-rate zones, and what that time is worth in ideal conditions — cool weather, at sea level. You can fill it in on the form before you ask, and the result opens already answered.
All of it is worked out in your browser: nothing you type there is sent to us or goes in the page's address. If you are signed in and have agreed to share health data, your profile fills in age, sex and heart rate for you.
And for your own runs
Open one of your runs and its breakdown is the first thing under its name — read from the distance you actually ran, not rounded to a standard race, and visible only to you. If you marked the run as training, it says so, because a race effort would come out faster. If it was hot, it tells you what the same effort would have taken in cool weather. Your personal records and the race times on the Performance tab link to theirs. Sharing a run you logged or uploaded yourself shares the public page of the same race and time — nothing about who ran it.
Elsewhere
Age grade now describes the run, not the runner: "54% · Great run" instead of an old club category, up to "World-record level" at the top. And on your own screens it stays behind the scenes — ranking your best runs and telling you how a run compares with your last 90 days — rather than handing you a percentage that reads like a bad grade for a good run.
