Ruck Pace
16:21 /mi
Total Time
1h 38m
Calories
750
Ruck Pace
16:21 /mi
Pack: 25% of body weight
Total Time
1h 38m
Calories Burned
750
Cal/Hour
459
Pack %
25%
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Price as of Jul 24, 2026. Product prices and availability are accurate as of the date indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
Inputs
Result
45 lbs = 9% slower on road. 15:00 × 1.09 = 16:21. Total time: ~1h 38m. Calories: ~830.
Inputs
Result
30 lbs on trail: 6% pack + 15% terrain. Base 15:00 × 1.06 × 1.15 = ~18:18. Total: ~1h 13m.
Pack weight slows your pace by approximately 2% per 10 lbs of added weight. A 45-lb ruck on a 15:00/mile base walking pace would slow you to roughly 16:21/mile. Heavier packs also significantly increase calorie burn.
| Pack Weight | Pace Impact | Cal/Hr (180 lb person) |
|---|---|---|
| 20 lbs | 4% slower | 410 |
| 35 lbs | 7% slower | 470 |
| 45 lbs | 9% slower | 510 |
| 70 lbs | 14% slower | 590 |
Rucking burns significantly more than walking. A 180-lb person walking at 15 min/mile burns about 370 cal/hr. Add a 45-lb pack and that jumps to roughly 510 cal/hr—a 38% increase. Pack weight, body weight, and terrain all affect the total.
Beginners should start with 10–20% of body weight and build up over 4–6 weeks. Military standard is often 35–45 lbs (dry weight). Never exceed 33% of body weight for extended rucks—injury risk rises sharply.
Road rucking is the baseline. Gravel or smooth trails add about 15% to your pace. Off-trail or rough terrain adds 35% or more. Hills compound the effect—a steep off-trail ruck can take twice as long as the same distance on road.
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Last Updated: Jul 24, 2026
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