Hiking Time Calculator

Naismith's Rule is a hiking guideline developed by Scottish mountaineer William Naismith in 1892. It states that hikers should allow 1 hour for every 3 miles (5 km) of distance, plus an additional 1 hour for every 2,000 feet (600 m) of elevation gain. This calculator applies Naismith's Rule as its base formula, then adjusts the result for descent, terrain difficulty, your fitness level, and planned rest breaks.

Most hikers walk at about 2 to 3 miles per hour (3.2–4.8 km/h) on flat, well-maintained trails. Uphill sections slow this to around 1.5–2 mph, while steep descents also reduce speed due to careful footing. Beginners and groups with children typically average closer to 1.5–2 mph overall, while fit and experienced hikers can sustain 3+ mph.

A 5-mile hike on relatively flat terrain takes the average hiker about 2 to 2.5 hours, not counting rest breaks. If the route includes 1,000 feet of elevation gain, expect closer to 2.5–3 hours. Adding terrain difficulty, a heavy pack, or a slow pace will push that estimate higher. Use this calculator to get a personalized estimate for your specific route.

Using Naismith's Rule, 6 miles at 3 mph takes about 2 hours for flat distance, plus 1 hour for 2,000 feet of gain — giving a rough estimate of 3 hours of moving time. With an average pace and normal terrain, total time including short breaks is typically around 3.5 to 4 hours. Enter your exact numbers into the calculator above for a more tailored result.

Yes, steep descents can add significant time, especially on rocky or technical terrain where careful footing is required. This calculator applies a descent correction: gentle descents (under ~10% grade) are assumed to be slightly faster, while steep descents are treated as time-consuming as climbing. Enter your total elevation loss to factor this into your estimate.

Use whichever unit system you are most comfortable with — both give the same result. Select 'Imperial' to enter distance in miles and elevation in feet, or 'Metric' to enter distance in kilometers and elevation in meters. The calculator automatically handles the conversion internally.

Terrain significantly impacts pace beyond what elevation alone accounts for. Well-maintained paths allow near-maximum speed, while rough, rocky, or off-trail terrain can reduce your effective speed by 20–40%. This calculator applies a terrain multiplier so your estimate reflects real-world conditions rather than just distance and elevation.

Yes — always plan your day using total time including breaks. A 4-hour moving time with 45 minutes of breaks means you should budget nearly 5 hours from trailhead to trailhead. This is especially important for catching transport, avoiding nightfall, or timing summit windows around afternoon weather. The calculator adds your specified rest break time directly to the moving time estimate.