Approach Time Calculator

Estimate trail approach time for climbing based on distance, elevation gain, pack weight, and fitness level. Uses modified Naismith's Rule with Tranter's corrections.

Inputs

Trail Distance

Elevation Gain

Pack Weight

Fitness Level

Tab to move between fields

Results

Estimated Approach Time

1h 45m

Average Pace

26.3 min/km

Time in Minutes105 min

Calories Burned666 kcal

Pack Weight Penalty2%

How to Use This Calculator

Enter the horizontal distance to the crag in km.
Input the total elevation gain along the approach in meters.
Set your pack weight in kg — heavier packs slow your pace by a measurable amount.
Select your fitness level to apply Naismith's Rule corrections for your actual hiking pace.
Read Estimated Approach Time in hours and minutes to plan your alpine start.
Use the Calorie Burn estimate to decide how much food and water to carry on the approach.

What each input means

Trail Distance: One-way trail distance to the climbing area in kilometers. Measure on a map or use a GPS track.
Elevation Gain: Total uphill elevation gain in meters on the approach. Include all uphill sections, not just net gain.
Pack Weight: Total backpack weight including climbing gear, water, and food. A sport climbing pack is typically 8-12 kg; a trad rack adds 3-5 kg more.
Fitness Level: Self-assessed fitness: 1 = sedentary/beginner, 2 = occasional hiker, 3 = regular hiker, 4 = fit athlete, 5 = elite mountain athlete.

What each result means

Estimated Approach Time: Total estimated one-way approach time in hours and minutes.
Time in Minutes: Total approach time expressed in minutes for easy comparison.
Average Pace: Overall pace including elevation gain. Flat trail pace is typically 10-15 min/km; steep approaches can exceed 20 min/km.
Calories Burned: Estimated energy expenditure for the approach based on the Pandolf equation (assumes 70 kg body weight).
Pack Weight Penalty: Additional time percentage added due to pack weight above 10 kg baseline.

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
Trail Distance = 4, Elevation Gain = 500, Pack Weight = 12, Fitness Level = 3 = 4 input(s) provided
Calculate Estimated Approach Time
Estimated Approach Time = `${hours
1h 45m = 1h 45m
Calculate Average Pace
Average Pace
26.3 = 26.3
Calculate Time in Minutes
105 = 105
Calculate Calories Burned
Calories Burned
666 = 666

Engine last updated July 26, 2026. Checked against 1 independently-derived test — how we verify calculators.

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