How Many Calories Do You Burn Per Hour?

Three variables determine how many calories you burn in any given hour: body weight, activity MET value, and duration. Of these, body weight and activity intensity are roughly equal in importance — a 10% increase in either produces a 10% increase in calories burned. Duration is linear: burning 300 kcal/hour for 30 minutes yields 150 kcal.

Body weight: the multiplier you cannot change in the short term

The calorie burn formula multiplies activity intensity directly by your weight in kilograms. A 90 kg person burns 28.6% more calories per hour than a 70 kg person doing the same activity at the same intensity. This is why published "calories burned per hour" tables are only accurate for a specific weight range — typically around 155–175 lb (70–79 kg). If you are significantly above or below that range, the quoted figures do not apply to you. The Calorie Burn Estimator on Quasar Tools applies the formula to your exact weight.

Activity intensity: the variable you control directly

Activity intensity is expressed as a MET value (Metabolic Equivalent of Task). Sitting still is 1.0 MET by definition. Walking at 3 mph is 3.5 MET — meaning it burns 3.5 times as many calories as sitting, per kilogram of body weight, per hour. Running at 6 mph is 10.0 MET. Choosing a more intense activity or increasing your pace within an activity raises the MET and directly increases your hourly calorie burn.

• Body weight — directly proportional; every extra kg raises burn by 1 × MET per hour
• MET value — the intensity rating of the activity; ranges from 1.0 (rest) to 18+ (elite sprinting)
• Duration — linear; half the time burns half the calories at the same MET
• Gradient — uphill walking at 5% incline roughly doubles MET compared to flat walking
• Load carried — a 10 kg backpack adds approximately 0.5–1.0 MET to walking or hiking

The MET formula is the standard method for estimating calorie expenditure from physical activity. Published by the American College of Sports Medicine and backed by the Compendium of Physical Activities (a database of 800+ MET values compiled by researchers at Arizona State University), the formula is:

Calories = MET × Weight (kg) × Duration (hours)

For a 70 kg person walking at 3.5 MET for one hour: 3.5 × 70 × 1 = 245 kcal. For 30 minutes: 3.5 × 70 × 0.5 = 122.5 kcal. For 90 minutes of the same walk: 3.5 × 70 × 1.5 = 367.5 kcal. The formula scales linearly with both weight and time, which makes it straightforward to apply once you know the MET for your chosen activity.

A MET value represents the ratio of the metabolic rate during activity to the resting metabolic rate — making it weight-independent and applicable across all body sizes without separate lookup tables.

Converting MET to calories per hour for common weights

The table below lists MET values and calories per hour for a 70 kg person across the most common everyday and exercise activities. All MET values are drawn from the Compendium of Physical Activities. For your own calorie burn, scale proportionally: if you weigh 80 kg, multiply the 70 kg figure by 80/70 (= 1.143).

Everyday and low-intensity activities

• Sleeping — 0.95 MET — approx. 67 kcal/hour for 70 kg
• Sitting (desk work) — 1.3 MET — approx. 91 kcal/hour
• Standing (light work) — 1.8 MET — approx. 126 kcal/hour
• Light housework (tidying, cooking) — 2.0–2.5 MET — 140–175 kcal/hour
• Slow walking (2 mph) — 2.8 MET — approx. 196 kcal/hour
• Moderate walking (3 mph) — 3.5 MET — approx. 245 kcal/hour

Moderate to vigorous exercise

• Brisk walking (4 mph) — 4.3 MET — approx. 301 kcal/hour
• Yoga (Hatha) — 2.5 MET — approx. 175 kcal/hour
• Yoga (Power/Vinyasa) — 4.0 MET — approx. 280 kcal/hour
• Cycling (light, 10–12 mph) — 6.8 MET — approx. 476 kcal/hour
• Cycling (moderate, 12–14 mph) — 8.0 MET — approx. 560 kcal/hour
• Swimming freestyle (moderate) — 8.3 MET — approx. 581 kcal/hour
• Running (5 mph / 12 min mile) — 8.3 MET — approx. 581 kcal/hour
• Running (6 mph / 10 min mile) — 10.0 MET — approx. 700 kcal/hour
• Running (8 mph / 7.5 min mile) — 13.5 MET — approx. 945 kcal/hour
• HIIT or circuit training — 8.0–12.0 MET — approx. 560–840 kcal/hour
• Rowing machine (vigorous) — 12.0 MET — approx. 840 kcal/hour

Steps-based activity translates to calories using the same framework — the Calories Burned in 1000, 5000 and 10000 Steps guide covers the exact conversion from step counts to kcal at different body weights and paces, which aligns directly with the MET values listed above.

The Calorie Burn Estimator on Quasar Tools handles the MET formula automatically. You select your activity, enter your weight and session duration, and the calculator returns the total calories burned along with the MET value used — so you can verify the calculation or substitute a different MET if your actual intensity differs from the standard value.

Even at complete rest your body burns calories continuously to maintain basic physiological functions — heartbeat, breathing, temperature regulation, and cellular repair. This baseline rate is your Basal Metabolic Rate (BMR), and it accounts for roughly 60–70% of total daily calorie expenditure in sedentary adults.

BMR expressed as an hourly rate

Divide your daily BMR by 24 to get an hourly resting burn rate. The Mifflin-St Jeor equation — the most widely validated BMR formula — gives approximately 1,600–1,800 kcal/day for a 70 kg adult male (67–75 kcal/hour) and 1,350–1,550 kcal/day for a 70 kg adult female (56–65 kcal/hour). Age reduces BMR by roughly 2% per decade after 30, and lean body mass increases BMR because muscle tissue burns more calories at rest than fat tissue.

TDEE: total daily energy expenditure

Your Total Daily Energy Expenditure (TDEE) is BMR multiplied by an activity factor: 1.2 for sedentary, 1.375 for lightly active (1–3 exercise days/week), 1.55 for moderately active, 1.725 for very active, and 1.9 for extremely active. A moderately active 70 kg male with a BMR of 1,750 kcal has a TDEE of approximately 2,713 kcal/day — meaning 113 kcal per hour on average across the full 24-hour day. Exercise sessions above that baseline represent the incremental calorie burn the MET formula captures.

If your goal is to burn as many calories as possible in a fixed time window, the choices you make about activity type, intensity, and structure matter more than the specific exercise chosen. Here is what the data shows about maximising burn efficiency.

High-MET activities per hour

Running remains the highest sustained-calorie-burn activity accessible to most people — 700–950 kcal/hour at moderate to fast paces for a 70 kg runner. Rowing and cross-country skiing reach similar MET values but require equipment or specific conditions. For gym-accessible options, HIIT (high-intensity interval training) delivers comparable hourly burn to steady-state running while varying the effort, which some people sustain more consistently over time.

EPOC: post-exercise calorie burn

High-intensity exercise produces EPOC (Excess Post-exercise Oxygen Consumption), sometimes called the "afterburn effect." After a vigorous HIIT session or heavy resistance training, your metabolic rate remains elevated for 12–48 hours, burning an additional 50–250 kcal beyond what the session MET calculation captures. EPOC is largest for sessions above 75% of maximum heart rate — use the Heart Rate Zone Calculator to identify your Zone 4 and Zone 5 training bands where EPOC is most significant.

Non-exercise activity thermogenesis (NEAT)

NEAT is the calorie burn from all movement that is not deliberate exercise — fidgeting, standing, walking around the office, household chores. Research shows NEAT can vary by up to 2,000 kcal/day between individuals at the same body weight. Standing at a desk for 4 hours burns approximately 200 more kcal than sitting for the same time. Consistently choosing standing over sitting, stairs over lifts, and walking over driving compounds into a significant weekly calorie difference without any formal exercise session.

MET-based calorie estimates are widely used and well-validated, but every estimation method has boundaries. Understanding where the formula is accurate and where it breaks down prevents over-relying on numbers that do not reflect your actual situation.

What the MET formula does not capture

• Body composition — higher muscle mass burns more per hour at the same MET than higher fat mass
• Terrain and gradient — uphill or off-road movement is not reflected in standard flat-ground MET values
• Load carrying — a heavy pack, weighted vest, or groceries add meaningful calories not in the base MET
• Heat and humidity — exercising in heat raises heart rate and calorie burn by 5–10% at the same perceived effort
• Fitness level — highly trained athletes often burn fewer calories than untrained individuals at the same MET because their cardiovascular efficiency is higher

Fitness trackers vs MET calculations

Fitness trackers (Apple Watch, Fitbit, Garmin) use a combination of accelerometer data, heart rate, and personal profile inputs to estimate calorie burn. Studies consistently show that most commercial trackers are accurate to ±10–20% compared to indirect calorimetry (the gold-standard laboratory measurement). Heart rate-based estimates improve accuracy for aerobic activities but are less reliable for resistance training, where heart rate underestimates metabolic load. The MET formula is comparable in accuracy to most consumer trackers for steady-state aerobic activity.

When accuracy matters most

For general fitness tracking and weight management planning, ±15% accuracy is sufficient — errors this size do not change weekly calorie deficit strategies. For clinical or competitive applications (competitive athletes managing weight class, patients with metabolic conditions), indirect calorimetry or laboratory metabolic testing is the appropriate tool. For everyday fitness goals, the Calorie Burn Estimator combined with consistent logging over 2–4 weeks gives you enough data to calibrate your personal calorie balance through observed weight change.