How many calories does an office worker burn in 8 hours?

A typical office worker burns about 500-700 calories during an 8-hour workday, only slightly more than if they were resting at home. This is why desk workers often need dedicated exercise time to maintain healthy weight.

Which jobs burn the most calories?

Construction workers, farmers, movers, and similar physically demanding jobs burn the most—often 1,500-2,500+ calories in an 8-hour shift. Jobs involving constant movement, lifting, and physical labor top the list.

Does a standing desk really burn more calories?

Yes, but modestly. Standing burns about 40% more calories than sitting—roughly 8-10 extra calories per hour. Over an 8-hour day, that's 60-80 extra calories. The bigger benefits are improved posture and reduced sedentary time.

Should I eat more if I have a physically demanding job?

Yes. Active workers may need 500-1,500+ more daily calories than sedentary workers of the same weight. Listen to your hunger signals and ensure adequate protein for muscle recovery.

How does my job affect my exercise needs?

If you have an active job, you may need less dedicated cardio but should focus on mobility and recovery. Sedentary workers benefit most from structured exercise to compensate for sitting all day.

Can I lose weight with a desk job?

Absolutely. Desk workers successfully lose weight by managing diet, adding exercise, and increasing movement throughout the day (walking meetings, stairs, lunch walks). The key is accounting for lower work-related calorie burn.

How Many Calories Do You Burn at Work? (Job Calculator)

Calculate calories burned at work by job type and hours. Free calculator covering office, nursing, construction, retail, and 20+ other occupations.

Quick answer

Working burns about 236–372 calories per hour, or 1888–2976 calories in 8 hours, for adults weighing 130–205 lb (59–93 kg). That estimate uses a MET value of 4 (moderate (teaching, walking job)); see the table below for other intensities. These figures are estimates from population-average MET values, not measurements of your own energy expenditure — actual burn varies with intensity, fitness, body composition and technique.

Example calculation

A 155 lb (70 kg) adult — moderate (teaching, walking job) — for 8 hours (480 minutes):

4 MET × 70 kg × 8 h = 2240 calories

That is 280 calories per hour, or about 4.7 calories per minute.

Calories burned working per hour, by body weight

Calories burned per hour by job type and body weight (MET method).
Job type	MET	130 lb (59 kg)	155 lb (70 kg)	180 lb (82 kg)	205 lb (93 kg)
Sedentary (office/desk)	1.5	89 cal	105 cal	123 cal	140 cal
Light (retail, standing desk)	2.5	148 cal	175 cal	205 cal	233 cal
Moderate (teaching, walking job)	4	236 cal	280 cal	328 cal	372 cal
Active (warehouse, delivery)	5.5	325 cal	385 cal	451 cal	512 cal
Very active (construction, farming)	7	413 cal	490 cal	574 cal	651 cal

Calories burned in 8 hours

Calories burned in 8 hours of working, by body weight.
Job type	130 lb (59 kg)	155 lb (70 kg)	180 lb (82 kg)	205 lb (93 kg)
Sedentary (office/desk)	708 cal	840 cal	984 cal	1116 cal
Light (retail, standing desk)	1180 cal	1400 cal	1640 cal	1860 cal
Moderate (teaching, walking job)	1888 cal	2240 cal	2624 cal	2976 cal
Active (warehouse, delivery)	2596 cal	3080 cal	3608 cal	4092 cal
Very active (construction, farming)	3304 cal	3920 cal	4592 cal	5208 cal

Method and formula

Calories = MET × body weight in kilograms × duration in hours. MET (Metabolic Equivalent of Task) expresses the energy cost of an activity as a multiple of resting metabolism, where 1 MET ≈ 1 kcal per kilogram of body weight per hour. Pounds are converted with lb ÷ 2.20462 = kg. Totals are rounded to the nearest whole calorie and per-minute figures to one decimal; no rounding is applied before the final step.

MET values for working are taken from the 2011/2024 Adult Compendium of Physical Activities.

What changes the result

Body weight: Directly proportional — doubling body weight doubles the estimate at the same MET and duration.
Duration: Directly proportional — calories scale linearly with time at a constant intensity.
Intensity: Sets the MET value. Moving one intensity step up typically raises burn 20–40%.
Terrain and incline: Not in the base MET value; uphill or resistance work increases the true cost.
Fitness and efficiency: Trained people use less energy for the same output, so estimates skew high for them.
Age, sex and body composition: Change resting metabolism and therefore the baseline the MET multiplies.

Limitations

A workday mixes tasks; a single MET value is a shift-average, not a minute-by-minute rate.
Breaks, commuting and desk time inside "active" jobs lower the true average.
Every figure here is an estimate, not a measurement — treat it as a planning number rather than a result.
MET values are population averages from the Compendium of Physical Activities; individual results commonly differ by 10–20%.
Actual intensity and pace matter more than the label: two people at the same nominal intensity can differ substantially in real effort.
Body composition and cardiorespiratory fitness change the result — more lean mass raises the baseline, while trained people move more efficiently and often burn less than the table shows.
Terrain, incline, surface and movement technique are not captured by a flat-ground MET value.
These are gross calories — they include the resting energy you would have burned anyway during that time.
MET tables are standardised on a 70 kg adult, so estimates are least accurate at very low or very high body weights.
Heart-rate monitors, wearables and laboratory indirect calorimetry can all give different numbers; measured testing is more accurate for an individual than any MET-based estimate.

Last updated: August 6, 2026