Calories burned
laying crushed rock or gravel
463 kcal / hour Laying crushed rock or gravel burns approximately 463 calories per hour for a 70 kg (154 lb) adult, and 232 calories in 30 minutes. Across the normal adult weight range the hourly figure runs from about 331 to 794 kcal.
It carries a MET value of 6.3 in the 2024 Adult Compendium of Physical Activities.
Calories burned laying crushed rock or gravel by body weight
Energy cost scales with the mass you move, so body weight changes the answer more than anything else.
| Body weight | 15 min | 30 min | 45 min | 60 min | 90 min |
|---|---|---|---|---|---|
| 50 kg (110 lb) | 83 | 165 | 248 | 331 | 496 |
| 60 kg (132 lb) | 99 | 198 | 298 | 397 | 595 |
| 70 kg (154 lb) | 116 | 232 | 347 | 463 | 695 |
| 80 kg (176 lb) | 132 | 265 | 397 | 529 | 794 |
| 90 kg (198 lb) | 149 | 298 | 447 | 595 | 893 |
| 100 kg (220 lb) | 165 | 331 | 496 | 662 | 992 |
| 110 kg (243 lb) | 182 | 364 | 546 | 728 | 1,091 |
| 120 kg (265 lb) | 198 | 397 | 595 | 794 | 1,191 |
Figures in kilocalories (the "calories" on food labels). The highlighted row is the 70 kg reference adult used in the headline figure; the highlighted column is one hour.
What 463 calories an hour actually means
At MET 6.3, laying crushed rock or gravel counts as vigorous activity — it uses about 6.3 times the energy your body burns sitting still. For a 70 kg adult that works out to roughly 8 kcal per minute, or 463 kcal across a full hour.
Within lawn & garden, that ranks 3rd of 34 activities by energy cost, a little below felling trees (MET 6.8) and above shoveling snow (MET 6).
Put differently: one hour of laying crushed rock or gravel costs about the same energy as 95 minutes of ordinary walking.
On the food side, a medium banana (about 105 kcal) takes roughly 14 minutes of laying crushed rock or gravel to offset at that body weight. That framing is useful for scale, but it is worth saying plainly: exercise and diet are not a ledger that cancels neatly, and appetite tends to rise with activity.
Questions
How many calories does laying crushed rock or gravel burn per hour?
About 463 kcal per hour for a 70 kg (154 lb) adult, using the Compendium MET value of 6.3. A 90 kg adult burns closer to 595 kcal in the same hour, because energy cost scales almost directly with body mass.
How many calories does 30 minutes of laying crushed rock or gravel burn?
Roughly 232 kcal at 70 kg, 198 kcal at 60 kg and 331 kcal at 100 kg. Halving the time halves the calories — the relationship is linear.
What is the MET value of laying crushed rock or gravel?
6.3. One MET is the energy you use sitting quietly, so MET 6.3 means 6.3 times that rate.
Is this an exact number of calories?
No, and no calculator can give you one. MET values are population averages measured in laboratory conditions; your own figure varies with fitness, technique, terrain, temperature and body composition. Treat these numbers as a solid estimate for planning, not a precise measurement — and treat any device or site claiming three-digit precision with suspicion.
Related activities
Three more from lawn & garden, and three with a similar energy cost from elsewhere in the Compendium.
MET value from the 2024 Adult Compendium of Physical Activities (activity code 08080). Calories computed as MET × 3.5 × weight kg ÷ 200 per minute. General information only — not medical, fitness or nutrition advice. Calorie figures are population estimates and vary between individuals.