Hiking Time Calculator (Naismith's Rule)
Enter distance and elevation gain to estimate your hiking time with Naismith's rule — adjusted for fitness, terrain, and breaks. Try it free.
Naismith’s rule is the classic mountaineer’s estimate: 5 km/h on flat ground plus 30 minutes for every 300 meters climbed. Pick your fitness level and get a realistic number — then add breaks on top.
Quick answer: Budget 2 mph on flat trail, add 30 minutes per 1,000 ft of climbing, then add 10 minutes per hour for breaks. Beginners should plan conservatively — it’s better to finish early than to race darkness. See our Naismith’s rule speed study for how the formula holds up against real GPS data.
Related guides
- How to Train for a Multi-Day Hike — build the fitness to match your planned mileage
- Best Time to Hike Zion and Banff — plan realistic days around the season
- Winter Day Hike Essentials — add 20–30% time in winter conditions
Based on Naismith's rule (5 km/h + 30 min per 300 m of ascent), adjusted for fitness. Add breaks on top.
Frequently asked questions
How accurate is Naismith's rule?
Within about 20% for most hikers on established trails — good for planning, not for precision. It assumes steady walking without long breaks; add 10 minutes per hour for breaks, more for photos, route-finding, or groups.
What is a realistic hiking speed for beginners?
About 2 mph (3 km/h) on flat ground, dropping to 1–1.5 mph with elevation gain or rough trail. The estimator above adjusts for fitness level — beginners should use the conservative setting and add buffer.
How much time should I add for elevation gain?
Naismith’s rule adds 30 minutes per 300 meters (1,000 ft) of climbing. Steep, rough, or high-altitude trails cost more — at altitude above 8,000 ft, add another 10–20%.
Keep planning with our guides
These tools pair with our nano-specific guides — problem-first answers for real bodies, real problems, and real budgets.