Your next start line awaits
Your fitness. Your course. Your race-day plan.
Find your pace and fuel every kilometre.
First strategy free · Race Pass €7 · Annual €19/year
Deterministic pacing engine
Race dates verified where available
Open-Meteo race-week forecast
AI narrative with number validation
Road marathon · Berlin
Course elevation · 42.2 km
Your race, in checkpoints
| Distance | Pace /km | Elapsed |
|---|---|---|
| 10 km | 4:36 | 46:12 |
| 20 km | 4:36 | 1:32:22 |
| 30 km | 4:34 | 2:18:40 |
| 40 km | 4:30 | 3:04:37 |
Computed from the course profile and typical conditions. Your plan uses your fitness.
See the complete sample ↗Berlin Marathon · elevation profile
01 / Know the course
Inspect the elevation profile, course sections and typical conditions. See where the terrain asks for patience, and where you can settle into your rhythm.
Explore the race library ↗Sample athlete · 80 g carbohydrates/hour
02 / Make it yours
Your recent performance becomes course-adjusted splits and a timed nutrition plan. Every pace and fuel target is calculated by the deterministic engine.
Inspect a complete strategy ↗One strategy, wherever the day takes you.
03 / Arrive prepared
Keep the full split table, danger zones and fueling schedule in one place. Print your race band before you head to the start line.
Choose your race pass ↗Turn a recent race time into a VDOT score and equivalent race times.
VDOT calculator ↗See how a recent performance translates to your next race distance.
Pace predictor ↗Understand how temperature and humidity change the pacing picture.
Heat-adjusted pace ↗Start here
Race pages
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Guides
Build a marathon fueling strategy from your finish time: the same six gels give a 2:30 runner 60 g/h but a 4:30 runner only 33 g/h.
A 5K workout plan for beginner, intermediate and advanced runners: sample weeks, a goal-pace table to the 400 m, and a mile test that sets your target.
How to use a half marathon pacer: per-km and per-mile pacer chart, which group to join, what closing a start gap costs, and why your watch disagrees.
Walking speed calculator formulas plus a 4–7 km/h table with mph, min/mile and finish times, cadence × step length, and the GPS errors that skew your pace.
Calculate running distance from pace and time, or measure a route on a map. Formula, ready-made table, and the drift errors that add 100–300 m to a run.
Convert altitude between feet and meters, then into air pressure and inhaled oxygen. A table from 0 to 3,000 m and the math for turning it into race pace.
You’ve put in the training. Give race day the same care.
Find your race ↗