What does a 10% slope mean?
A 10% slope gains 10 metres of elevation for every 100 horizontal metres. A 10% grade is not a 10° angle: it is approximately 5.7°.
Trail Slope Calculator
Calculate slope percentage and angle from distance and elevation change. You also get the true slope length, elevation per kilometre, and a simple indication of how steep the segment is.
The formula
Grade (%) = elevation change ÷ horizontal distance × 100. GPS distance usually follows the ground, so it remains a useful approximation on ordinary slopes, but the difference grows on very steep terrain.
Why does slope matter in trail running?
As the grade increases, power hiking becomes more efficient and pace per kilometre becomes less meaningful. Technical difficulty, grip, and climb length remain just as important as average grade.
Results
Average grade
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Angle
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Distance along the slope
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Elevation per kilometre
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Interpretation
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Example: 150 m of elevation gain over 1.5 horizontal kilometres is an average grade of 10%, or approximately 5.7°.
The result describes an average slope. An uneven climb can alternate between flat sections and ramps that are much steeper than this value. Always check the detailed elevation profile before a race.
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Download on the App StoreF.A.Q
Everything you need to know about TrailRun training plans, workout tracking, and features.
Is TrailRun right for me if I am new to trail running?
Yes. Whether you are discovering trail running or aiming for an ultra, TrailRun creates a plan tailored to your level, goal, and daily life so you can progress without rushing.
How is my personalized training plan created?
When you sign up, you provide your level, goal, availability, and constraints. TrailRun then generates a balanced plan with running sessions, integrated strength training, clear targets, and explanations for every workout.
What is included in the free version?
The free version lets you get a personalized training plan, reschedule your workouts, create your own routes, sync your sessions with your watch, and benefit from coaching tips.
What does the Pro subscription really unlock?
Pro includes every free feature, daily guidance from an expert coach, plan adjustments when life gets in the way, precise workout targets, overtraining alerts, and in-depth stats analysis. You also get injury-prevention strength training, ideal routes with elevation profiles, 3D Flyover, and GPX export to your watch.
Can I move my sessions if my schedule changes?
Yes. You can reschedule your workouts when your availability changes. With Pro, your plan also adapts to unexpected events so your progress stays consistent without disrupting your preparation.
Can TrailRun help me avoid injuries or return after an injury?
TrailRun includes strength work, recovery, and progressive return-to-running programs designed by professionals. If you are injured or pain persists, the app does not replace medical advice.
Can I track my runs without a watch and find routes?
Yes. Built-in GPS tracking records your route, distance, pace, altitude, elevation gain, and elevation loss, even without a watch. You can also create your own routes, discover new ones, and use Pro to explore your course in a 3D Flyover.
Can I sync my workouts with my watch?
Yes. You can sync your TrailRun workouts with your Apple Watch and Suunto watch. Garmin compatibility is coming soon.
How does TrailRun adapt my training as I progress?
TrailRun uses your training history to adjust your training volume. Advanced statistics help you track changes in your training load, measure your progress, and better understand your coach's advice.
Can I cancel my subscription at any time?
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