Navigation Calculators
Map distance, grid references, bearings, pace counting and route planning tools for the outdoors.
Map Distance Calculator
Convert map measurements to real-world distances using your map scale.
Grid Reference Calculator
Convert between 6-figure and 8-figure OS grid references with easting and northing.
Bearing Calculator
Calculate the bearing between two grid references or coordinates.
Pace Counter Calculator
Calibrate your pace count for accurate distance measurement on foot.
Walking Time Calculator
Estimate walking time using Naismith's rule with Tranter's corrections for fitness.
Elevation Gain Calculator
Calculate total elevation gain and loss from a series of height points along a route.
Route Planning Calculator
Plan multi-leg routes with distance, elevation and estimated time for each section.
Compass Declination Calculator
Calculate magnetic declination correction for accurate compass navigation in the UK.
8 free calculators in Navigation
Outdoor Navigation in the UK
Navigation skills are essential for anyone heading into the UK hills and mountains. While GPS devices and phone apps are useful tools, the ability to read an Ordnance Survey map and use a compass remains the gold standard for safe navigation in poor visibility.
The UK uses the Ordnance Survey National Grid reference system, with 6-figure references accurate to 100 metres and 10-figure references accurate to 1 metre. Our grid reference calculator helps you convert between formats and understand easting and northing coordinates.
Walking time estimation in the UK commonly uses Naismith's rule: allow 5km per hour on the flat plus 1 minute for every 10 metres of ascent. Tranter's corrections then adjust this for individual fitness. Our walking time calculator applies both methods for realistic time estimates.