Hiking time calculator: estimate your pace with elevation
“How long will this take?” is a harder question than it looks. Ten miles on flat ground and ten miles with 3,000 feet of climbing are not the same hike, even though the distance is identical. If you plan your day off mileage alone, you’ll either arrive at camp with hours of daylight to spare or you’ll be setting up a tent in the dark.
Here’s the logic behind estimating hiking time properly, and a calculator that does it for you.
The old rule: Naismith’s
The classic version of this problem is over a century old. Naismith’s Rule, published in 1892 for Scottish hillwalkers, says: budget one hour for every 3 miles (5 km) of distance, plus an extra hour for every 2,000 feet (600 m) of ascent.
It’s a decent starting point, but it was built for day hikers moving fast and light, not backpackers under a loaded pack. Most people carrying multi-day gear move slower than Naismith assumed on the flat sections, even though the climbing penalty turns out to be roughly the same one this calculator uses.
A version that fits a loaded pack
The version worth using for backpacking swaps in a slower baseline pace and a slightly heavier elevation penalty:
Hiking hours ≈ (miles ÷ 2) + (elevation gain in feet ÷ 2,000)
That’s roughly 2 mph on flat ground with a loaded pack (slower than Naismith’s 3 mph day-hiker pace), keeping the same one-hour-per-2,000-feet climbing penalty Naismith used. A flat 10-mile day comes out to 5 hours of moving time. A 10-mile day with 3,000 feet of gain comes out closer to 6.5 hours, even though the map distance didn’t change.
This is moving time only. It doesn’t include breaks, lunch, water filtering, photos, or setting up camp. Add your own buffer on top, typically another hour or two depending on how you like to hike.
Why “effort miles” is the more useful number
A cleaner way to compare days to each other is to convert climbing into equivalent flat miles, an idea sometimes called “effort miles”:
Effort miles ≈ distance + (elevation gain ÷ 1,000)
Under this formula, every 1,000 feet of climbing counts like an extra mile of flat walking. A 10-mile day with 3,000 feet of gain becomes 13 effort miles, roughly the same workload as a flat 13-mile day. This is the number worth comparing across days when you’re deciding where to put your hardest climb in a multi-day itinerary; a raw mileage total hides how much harder a climbing day actually is.
Try it
Ridgefold’s free trip length calculator runs this exact math. Enter a total distance and elevation gain, set a comfortable pace, and it splits the trip into days automatically, showing miles, climb, estimated hiking time, and difficulty for each one. It’s the same formula the Ridgefold planner uses when it breaks a drawn route into a day-by-day itinerary.
A few things the formula doesn’t know
Terrain quality. A smooth, well-graded trail and a rocky, root-tangled one can have the same distance and elevation numbers and still take very different amounts of time. Trail condition isn’t something distance and gain alone can capture.
Altitude. Above roughly 9,000–10,000 feet, most people slow down regardless of fitness. If your trip spends significant time at high elevation, pad your estimate further.
Group pace. A group moves at the pace of its slowest comfortable member, not the average. Plan around that person’s realistic pace, not the fittest hiker’s.
Weather and conditions. Mud, snow, heat, and wind all change your real pace in ways no formula accounts for ahead of time. Treat any hiking-time estimate as a planning baseline, not a guarantee.
Frequently asked questions
Is Naismith’s Rule accurate for backpacking?
It’s a reasonable starting point but was designed for day hikers, not backpackers with full packs. The loaded-pack version above (2 mph flat, plus an hour per 2,000 ft of gain) tends to match multi-day trip pacing better.
How much does elevation gain really slow you down?
As a rule of thumb, every 1,000 feet of climbing adds roughly the same time cost as an extra mile of flat walking. A day with 4,000 feet of gain can take noticeably longer than the raw mileage suggests.
Does this formula account for descents?
Not directly. Steep, technical descents can be nearly as slow as climbing, though the formula treats descending distance the same as flat distance. If your route has a long, rough downhill, budget extra time beyond what the calculator shows.
What pace should a beginner backpacker plan for?
Somewhere around 1.5 to 2 mph moving time is a safe starting assumption for a first multi-day trip with a loaded pack. You can dial that in with more experience; see how many miles per day you should plan for the full breakdown.
Once you know your pace, the next step is applying it to a real route instead of a flat total. Ridgefold draws your route on real trails, pulls the actual elevation profile, and splits it into days automatically wherever you drop a camp.