The accuracy of some corrections is disputed,Tranter's corrections make adjustments for fitness and fatigue. Over the years several "corrections" have been formulated in an attempt to make the rule more accurate. After determining the length and the points of a journey, the next question needed to be asked is how long will each point take?

Practical skills are more fun and rewarding then tapping a screen for results.© Copyrights 2020 Canny Adventures All Rights Reserved Except, that is, when it doesn't. When walking on poor terrain, allow 1 hour for every 2.5 miles (4 km) forward, instead of 1 hour per 3 miles. Alternatively, the rule can be used to determine the equivalent flat distance of a route. Fitness is determined by the time it takes to climb 1000 feet over a distance of ½ mile (800 m). Naismith’s rule, named after William W. Naismith, was devised in 1892 to estimate the time taken to cover distances in the mountains. After determining the length and the points of a journey, the next question needed to be asked is how long will each point take? Additional adjustments for uneven or unstable terrain or conditions can be estimated by dropping one or more fitness levels. This will give an accurate time taken for the whole day and will be there to measure your progress throughout. Naismith’s Rule is a rule of thumb that helps in the planning of a walking or hiking expedition by calculating how long it will take to walk the route, including ascents. He was obviously a fast walker!

He assumes the Langmuir 2013 recalls the Naismith's rule from 1892 in UKH Articles and Gear Reviews by Dan Bailey Naismith's Rule is a formula that can be used when planning a hill route to work out - roughly - how long it ought to take.
Devised in 1892 by the Victorian mountaineer William Naismith, this well known rule of thumb remains in common use today with only minor revisions. VAT: GB 921644240.

A modern version can be formulated as follows: While this may be more accurate for some people or under certain conditions, it does not explicitly account for any additional variables. They feature the most popular OS map scales – 1:25000, 1:50000 and 1:40,000. His simple rule was to "allow 1 hour for every 3 miles forward, plus ½ hour for every 1000 feet of ascent". This will give an accurate time taken for the whole day and will be there to measure your progress throughout. This is a skill that will come with experience and are many different forms that can be used.A rule that was devised by William W Naismith, a Scottish mountaineer in the late 19th century. The time should be calculated for the slowest person in a walking group. For convenience a 8 to 1 rule can be used. The basic rule assumes hikers of reasonable fitness, on typical terrain, under normal conditions. I’ve found this rule of thumb to be accurate and I plan my longer hikes based on this calculation. The formula has been adapted a little since then and considers the distance to walk, the altitude changed and the speed that you will walk at. 0.12) = 23.4 min / km. Naismith's Rule Naismith Rule is 12min for each kilometre and 1min for each 10m of ascent. That is, 7.92 (= 15840/2000) units of distance are equivalent to 1 unit of climb. Over the years several adjustments have been formulated in an attempt to make the rule more accurate by accounting for further variables such as load carried, roughness of terrain, descents and fitness (or lack of it).

Naismith's Rule Naismith's Rule, allows an easy calculation of the time taken for a hill walk, for a reasonably fit and steady walker: 15 minutes for every kilometre of horizontal distance, plus 10 minutes for every 100 metres of ascent. If you ever do a Mountain Leader or Navigation course, then you’ll have this drummed into your head. That’s 1 km for every 12 minutes on flat land or 1 mile for every 20 minutes. The original Naismith's rule from 1892 says that one should allow one hour per three miles on the map and an additional hour per 2000 feet of ascent. Naismith's rule helps with the planning of a walking or hiking expedition by calculating how long it will take to travel the intended route, including any extra time taken when walking uphill. The simplicity of this approach is that the time taken can be easily adjusted for an individual’s own (chosen) speed on the flat; at 8 km/h (flat speed) the route will take 4 hours and 6 minutes. Naismith’s rule goes like this: a hiker who isn’t carrying any weight or stopping for breaks will walk approximately 5 kilometers an hour (3 miles per hour). All rights reserved.