Free Walking Tool
Walk Timing Calculator
Estimate how long your fell walk will take from the distance and height gained, using Naismith's Rule — so you can plan your day and get back before dark. No account, no app, works offline.
The total you climb over the whole route, not the summit height.
Average — standard Naismith pace
Or try a popular Lakeland walk
Approximate figures for a common route up each; your actual route may differ.
Pair it with the right OS map
Disclaimer
The walking time shown by this tool is an estimate only, calculated from the figures you enter using a version of Naismith's Rule with a pace adjustment, and is provided free of charge for general guidance only, on an "as is" basis.
Naismith's Rule is a rough rule of thumb. It does not take account of rough, wet, boggy, rocky or pathless ground, steep or awkward descents, scrambling, snow or ice, river crossings, poor visibility, strong wind or other weather, the weight you carry, your fitness on the day, navigation difficulties, or the time taken for breaks beyond any allowance you add. Real walks frequently take considerably longer than the estimate. Treat the result as a minimum and always allow a generous additional safety margin, particularly on the higher and more remote Lakeland fells and in winter conditions.
You should always carry an appropriate map and compass, a head torch and spare batteries, suitable equipment and supplies, and have the navigation skills and experience needed before setting out. Use of this tool is entirely at your own risk.
To the fullest extent permitted by law, TheLakeDistrict.com accepts no responsibility or liability for any loss, injury, damage, delay, accident or inconvenience arising directly or indirectly from use of this tool or reliance on the information it provides. Nothing in this disclaimer excludes or limits any liability that cannot lawfully be excluded or limited.
How It Works
What is Naismith's Rule?
A rule of thumb from 1892: allow about one hour for every 5 km (3 miles) of distance, plus an extra hour for every 600 m of height gained. This tool uses that, then adjusts for the pace you choose and adds any rest time.
How accurate is it?
It's a guide, not a guarantee. It can't know about boggy ground, steep descents, scrambling, weather, heavy packs or how you feel on the day. Treat the figure as a minimum and add a margin — especially on the big fells and in winter.
Where do I find distance and height gained?
From your route guide, an OS map, or a mapping app. "Height gained" (ascent) is the total you climb across the whole walk added up — not just the height of the summit — so an up-and-down route can have far more ascent than you'd expect.
Is it really free?
Yes — no account, no sign-up, no app. It runs entirely in your browser and works offline once the page has loaded.
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