Hiking Time Calculator

Naismith's Rule is a guideline created 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 extra hour for every 2,000 feet (600 m) of elevation gain. This calculator applies Naismith's Rule as its base formula and then adjusts for your fitness level, terrain difficulty, elevation loss, and planned rest breaks to give you a more personalized estimate.

Most hikers on a well-maintained trail average between 2 and 3 miles per hour (3–5 km/h) on flat ground. Elevation gain, rough terrain, pack weight, and individual fitness all slow that pace down. Beginners may average 1.5–2 mph, while experienced hikers can sustain 3 mph or more. This calculator's 'Average hiker' setting uses approximately 2.5 mph (4 km/h) as a baseline.

On flat terrain with no elevation gain, an average hiker completes 5 miles in roughly 1.5 to 2 hours. Add 500–1,000 feet of elevation gain and you should plan for 2 to 2.5 hours. Always add time for rest breaks, tricky terrain, and pack weight. Use this calculator with your specific trail stats for the most accurate estimate.

Using Naismith's Rule, 6 miles takes about 2 hours at 3 mph, and 2,000 feet of gain adds another hour, giving a total of approximately 3 hours of moving time for an average hiker. Add 30 minutes for breaks and you're looking at roughly 3.5 hours total. Tougher terrain or a slower fitness level can push that to 4 hours or more.

Significant downhill sections do add time compared to flat hiking — steep descents require careful footing and put strain on your knees. A common correction to Naismith's Rule adds extra time for every 1,000–2,000 feet of descent on steep ground. This calculator accounts for elevation loss using a modified factor so your estimate reflects the full out-and-back or point-to-point route.

Terrain has a large impact on pace. A paved path allows faster movement than a rocky scramble. This calculator applies a terrain multiplier: well-maintained trails are the baseline, rough or rocky terrain slows your pace by roughly 15–25%, and off-trail scrambling can slow you by 30–40% compared to a groomed path.

Yes — rest breaks are a critical part of trip planning. Most hikers take 5–10 minutes of rest per hour of hiking, plus longer breaks for meals or views. A 6-hour hike can easily include 45–60 minutes of rest time. This calculator lets you input your planned break time in minutes so your total plan reflects real-world conditions.

This calculator gives a solid estimate based on widely used formulas, but individual results vary. Factors like altitude, weather, pack weight, group size, and personal fitness on the day can all affect your actual time. Use the result as a planning guide, add a safety buffer of 15–20%, and always let someone know your expected return time.