Hiking Time Calculator
Ever stood at the start of a walk wondering, “How long is this actually going to take me?” Same.
Whether you're heading out for a quick wander with the kids or a big leg-burner in the hills, having a rough idea of how long your hike will take can make all the difference - especially when you're chasing views and daylight.
This handy little calculator is based on Naismith’s Rule, a well-known way to estimate hiking time using distance and elevation. And if you hike at a different pace (we all do!), I’ve added an option to adjust for that too - whether you’re in slow-plod mode or powering up like a mountain goat.
Estimated Hiking Time (Naismith’s Rule)
This first version of the calculator uses the classic Naismith’s Rule:
1 hour for every 5km (3 miles), plus 1 hour for every 600m (2,000ft) of ascent
So, if you’re doing a 10km route with 600m of elevation gain, you’re looking at about 2 hours hiking time.
Use the calculator below to try it out for your next route:
Estimated Hiking Time (Naismith's Rule)
What is Naismith’s Rule?
Naismith’s Rule was created back in 1892 by a Scottish mountaineer called William W. Naismith. His aim? To help people estimate how long a route would take based on distance and how much uphill was involved.
The formula is pretty straightforward:
1 hour per 5km (3 miles) on flat ground
Add 1 hour per 600m (2,000ft) of ascent
It’s brilliant for rough planning, especially in the mountains — but keep in mind, it doesn’t account for terrain (think bogs, scrambles or scree), fitness levels, or breaks for snacks, nappies, or a well-earned summit sit-down.
How Accurate is Naismith’s Rule?
In short: it’s a decent estimate, but not perfect.
Naismith’s Rule is great for giving you a ballpark figure, especially if you’re doing hill walks or longer routes. But it assumes a steady pace on decent terrain - which, let’s face it, isn't always real life.
Here’s when it might be less accurate:
The ground is steep, rocky, or boggy
You’re walking with kids (hi, fellow hiking parents!)
You’re stopping often for photos, snacks, or just to enjoy the view
You’re particularly speedy or taking it super steady
Knowing roughly how long your hike will take is a simple but powerful thing. It helps you plan better, pack right, and stay safe — especially in places where weather, light, or little legs can make a big difference.
So whether you're heading out for an early morning solo hike or a laid-back loop with the family, give the calculator a go — and let it take a bit of guesswork out of your next adventure.
And remember: there’s no rush in the mountains. It’s not a race — it’s a wander.