SIMPLE KONA CALCULATOR · 2026
KONA 2026
What will your watts get you?
Compare bike time, aero setup and weather—or find the power for a target time or historical percentile. Keep a setup, change one input and see the time gained or lost.
Start from
Race start
Override bike start
Weather · 2026 forecast
TAKE THE PLAN FURTHER
Build your full Kona race plan.
Explore pacing and aero position by section, plan fuel and hydration across the bike and run, and save plans you can return to.
The Kona race planner is live and free with an account. The wider BikeCRT app is coming soon.
How the calculator works
How it works. The free Kona calculator uses physics-based course simulations run in advance and checked against separate simulation cases for fast browser comparisons.
Explore your choices. Try steady power or terrain targets, compare aerodynamic drag and carried mass, and see how weather and bike start time change the estimate. Work backward from a target bike time or a historical percentile to explore the power it requires.
Weather and setup. Each result uses the selected historical day or frozen 2026 forecast snapshot, with constant aero setting and carried weight. Review the forecast issue time beside the weather choice.
Historical context. Percentiles compare bike splits with the 2024 men’s or 2025 women’s Kona field. Source: TriTimes.
Sharing. Your kept comparison lasts while this page is open. Anyone with your setup link can see the settings you shared. The download works offline and doesn’t collect usage data.
Privacy. Online visits may be counted without names, emails or tracking cookies. Your calculator settings aren’t included. Do Not Track and Global Privacy Control are respected.
Model scope. Bike travel at the entered power and setup. Sustainable effort, heat effects on performance, gust handling, the swim/run and official cutoff checks are outside this calculation.