Hiking Time Calculator
Enter the route distance, total ascent, your honest pace and break habits. The calculator applies Naismith's rule - the 1892 formula every routing app still builds on - and shows walking time, the climb penalty and your turnaround point.
Route apps show kilometres and pretend hills are free. This calculator prices the ascent separately, because the climb is what turns 'just 6 km' into an afternoon - and it hands you the turnaround discipline that keeps afternoons from becoming nights.
How to use
- Read distance and cumulative ascent off the route profile (any maps app shows it).
- Pick your real pace on flat ground - time a 5 km walk if you have never measured.
- Add breaks honestly, and note the turnaround time before you set out, not at the junction.
Frequently asked questions
What is Naismith's rule?
One hour for every 5 km of distance plus one hour for every 600 m of ascent, formulated by Scottish mountaineer W. W. Naismith in 1892. Simple, surprisingly robust, and still the backbone of modern route-time algorithms.
Does descent really take no extra time?
Naismith counts only ascent, but steep descents slow most walkers below flat pace - knees shorten strides on rocky ground. Rough or technical descents deserve an extra quarter of the flat-time estimate.
How many kilometres can I hike in a day?
A fit walker covers 20-25 km of trail with modest ascent in a day; 15 km with 800 m of climbing feels the same. The ascent penalty in the calculator is why route profiles matter more than distance.
What is the turnaround rule?
Turn back at half the total estimated time, whatever the summit looks like and however close it feels. Weather, injuries and dusk all arrive faster than regret - the summit is optional, the descent is mandatory.