Join Our Email List
Studio updates, straight to you
← All calculators
Hour Record Planner
Plan a target distance, estimate power and build a pacing sheet for an hour attempt.
Set a target distance, compare it with a known ride if you have one, and build a pacing plan for the hour.
Hour attempt lap plan
Target
What do you know?
If you have a previous distance, use it as a baseline. Otherwise enter the CdA or power you know for the target.
Rider and track conditions
More settings
Race strategy and fade
Line control fade (mm)
Extra average distance above the line by the finish. Use the arrows in 50 mm steps.
Your target plan
Required settled power–
Average settled lap–
Target distance–
Average settled lap–After the standing lap
Fastest settled lap–Planned full lap
Slowest settled lap–Planned full lap
Credited laps–On the track's reference line
Extra riding from line control–Approximate distance beyond the reference line
Lap time through the hour
Target pacing strategyBaseline pace
Settled lap pace after the 24.00 s standing lap. Baseline pace is modelled at your entered or estimated reference power with the selected power, CdA and line fades. It does not follow the chosen pacing strategy. These are lap-equivalent paces at each moment; the checkpoint table gives target crossing times. Hover or tap a 10-minute marker for detail.
Checkpoints
Choose how often to check your target splits.
| Checkpoint | Target elapsed | Target distance | Target lap pace | Power required | Projected distance* |
|---|
* At the reference power with the selected power, position and line-control fades. The first lap is fixed to the entered standing-lap time; its power is not estimated.
What would it take to reach the target?
Each result changes one variable while holding the others fixed. These are modelled requirements, not independent measurements or equipment guarantees. The line-offset estimate retains the selected line-control fade.
Lap-by-lap pacing sheet
Target crossing times follow the selected pacing strategy. The first lap uses your entered time. The final row may be a partial lap.
| Lap / point | Credited distance | Target elapsed time | Lap time |
|---|
How the estimate works
The first lap is fixed to the entered time; its acceleration and power are not modelled. Afterward, estimated crank power = [½ × air density × CdA × physical speed³ + Crr × mass × gravity × physical speed] ÷ drivetrain efficiency. The extra path is approximated as 2π × horizontal line offset per lap. Pacing changes settled speed through the hour. Power, CdA and line drift change linearly between their early and late values. This simplified model does not resolve banking, bend dynamics, body movement in corners or biological fatigue. Calibrate with measured testing where possible.
