Free MET Activity Calculator

Turning Movement Into Calories

You burn calories every second you are alive, and far more when you move. The MET system is the standard scientific way to translate any activity — from sleeping to sprinting — into a comparable energy cost. Instead of vague labels like "light" or "intense," MET values let you put a real number on your day. This calculator totals your movement so you can balance it against what you eat, and it exposes the quiet truth that most people's biggest energy leak is not the workout — it is everything else they do, or don't do, all day.

What a MET Is

One MET (Metabolic Equivalent of Task) is your resting metabolic rate — the energy of sitting quietly, about 3.5 mL of oxygen per kg of body weight per minute. Every activity is rated as a multiple of that rest:

• Sleeping: ~0.9 MET
• Walking 3 mph: ~3.3 MET
• Cycling moderate: ~7.5 MET
• Running 6 mph: ~9.8 MET
• Vigorous competitive sport: 10+ MET

The Compendium of Physical Activities (Ainsworth et al.) catalogs MET values for hundreds of movements, and that is the data backbone of this calculator.

The Calorie Formula

kcal = MET × 3.5 × weight(kg) ÷ 200 × minutes

Worked example: a 70 kg person runs 30 minutes at 9.8 MET:
9.8 × 3.5 × 70 ÷ 200 × 30 = 9.8 × 245 ÷ 200 × 30 = 2401 ÷ 200 × 30 = 12.0 × 30 = 360 kcal.

A second example: the same person walks 45 minutes at 3.3 MET:
3.3 × 3.5 × 70 ÷ 200 × 45 = 3.3 × 245 ÷ 200 × 45 = 808.5 ÷ 200 × 45 = 4.04 × 45 = 182 kcal. The walk is longer but burns about half — intensity multiplies the total fast.

Using the Calculator

1. Enter your weight.
2. Add each activity you did, choosing its MET value and the minutes spent.
3. The tool sums the day and shows total exercise calories burned.
4. Repeat across a typical week to find your true movement average.

Why METs Beat "Activity Level" Dropdowns

Generic TDEE sliders (sedentary/active) lump everything together. MET tracking captures reality: a 20-minute walk, an hour of lifting, and a bike commute are three different burns. Summing them shows that a supposedly "sedentary" office worker who walks and commutes may out-burn a "moderate" gym-goer who sits the rest of the day. The dropdown hides that; MET math reveals it.

The Hidden Power of NEAT

Non-Exercise Activity Thermogenesis — standing desks, pacing calls, taking stairs — is the most variable part of anyone's budget. Studies of humans living in controlled chambers show NEAT differing by up to 700 kcal/day between individuals at the same weight. Tracking it explains why two friends eating the same food get opposite results. A simple win: a 15-minute walk at 3.3 MET for a 70 kg person is ~57 kcal; do it twice a day and that is ~114 kcal/day, ~800 kcal/week, with zero "exercise" feel.

Practical Ways to Use Your Number

• Fat loss: add a daily 200–400 kcal of movement rather than cutting food further.
• Maintenance: keep a weekly movement floor so intake doesn't drift.
• Performance: log hard sessions to time nutrition and recovery around them.

Limitations

MET formulas assume average mechanical efficiency. Heavy individuals burn more absolutely; highly trained individuals burn less per unit effort. Wearables often overstate by 10–20%. Treat totals as estimates to triangulate with your scale and Reverse TDEE.

Common Mistakes

• Logging only the gym and forgetting commuting, chores, and walking.
• Eating back 100% of a watch estimate that overstates burn.
• Assuming one hard workout offsets a seated weekend.
• Comparing MET totals to someone with a different body weight.

Link It to Your Other Tools

• TDEE — set your baseline, then add movement on top.
• 1RM — quantify the cost of your strength sessions.
• Water Intake — raise hydration on high-MET training days.

A Realistic Day Example

70 kg person: sleep 7 h (0.9 MET ≈ 398 kcal just existing), desk 8 h (1.3 MET ≈ 583), 40-min walk commute (3.3 MET ≈ 162), 50-min lifting (6 MET ≈ 368), evening bike 30 min (7.5 MET ≈ 275). Total movement beyond rest ≈ 1390 kcal. That context is exactly what makes TDEE useful — you see the whole day, not just the workout.

Frequently Asked Questions

METs vs Wearables: Where Each Shines

Wearables estimate burn from heart rate and motion, which is convenient but often off by 10–20%, especially for strength work and walking. MET values are a fixed, published standard — less personal but more transparent and reproducible. The best practice is to use MET math for a defensible baseline and treat the watch as a cross-check, not the source of truth. If they disagree by more than ~15%, trust the MET total and your scale trend over the gadget.

Myths About Exercise Calories

• "I earned a huge meal." A 30-minute run rarely burns more than a small snack; eating it all back stalls loss.
• "More sweat = more calories." Sweat is cooling, not a calorie meter; hot-room sessions inflate perceived effort, not always burn.
• "Only the gym counts." NEAT — walking, standing, chores — often dwarfs the workout over a full week.

NEAT Experiments You Can Run

1. Swap a 20-minute drive for a walk twice a day for a week; log the MET total.
2. Stand during one daily meeting; note the calm energy change.
3. Take the stairs for a month; track the cumulative minutes in the calculator.

Small, consistent movement compounds. The calculator makes the compound visible instead of invisible.

A Full-Day MET Example

For an 80 kg person: 8 h sleep at 0.9 MET ≈ 410 kcal, 8 h desk at 1.3 MET ≈ 667, 40-min walk at 3.3 MET ≈ 185, 50-min lifting at 6 MET ≈ 421, 30-min bike at 7.5 MET ≈ 314. Total beyond basal ≈ 1997 kcal of movement — far more than the lifting alone suggests. Seeing the whole day is exactly why MET tracking beats a single workout label.

Building a Weekly Movement Average

A single day of tracking is meaningless; a week reveals your real baseline. Log every day for seven days, then average. Most people discover their "active" self-image hides a lot of sitting, or conversely that their NEAT is higher than they thought. The weekly average is the number to compare against your TDEE so intake and output actually align.

MET Values for Common Activities

Using METs for Fat Loss

If food cuts feel unsustainable, add movement instead of starving. An extra 250–400 kcal/day of walking or cycling produces the same deficit as a harsh diet with far less hunger and muscle loss. The calculator lets you test scenarios: "If I walk 45 minutes daily, what's my weekly burn?" That question turns vague intent into a number you can plan around.

Why Wearables Overstate

Wrist devices estimate burn from heart rate, which rises with heat, stress, and bad fit — not just work. They often credit calories you didn't really burn. MET math is conservative and reproducible. Use the watch for heart-rate zones, but trust MET totals (cross-checked by your scale) for energy balance. If the watch says 800 kcal for a session the MET formula says 360, believe the lower number and let the scale confirm.

METs for Weight Maintenance and Gain

Movement isn't only for fat loss. During a lean bulk, a little extra NEAT prevents excess fat gain by widening the "maintenance" band so a small surplus stays small. During maintenance, a consistent weekly movement floor keeps your intake honest as life gets busy. The calculator shows the real cost of your week, so you can eat to your actual output rather than a guess — the difference between steady and drifting.

Comparing Activities Fairly

Not all "exercise" is equal. A gentle yoga class (~2.5 MET) burns a fraction of a run (~9.8 MET) in the same time, yet both have value — one for recovery and mobility, the other for calorie burn and cardio. The calculator lets you swap activities by effect: "30 minutes of cycling ≈ 15 minutes of running" for burn, helping you plan around a busy day without shortchanging the week.

METs and Heart Health

Guidelines frame aerobic targets in MET-minutes per week (e.g., 500–1000 MET-min). A 10 MET activity for 30 minutes contributes 300 MET-min. Tracking your week in METs shows at a glance whether you're hitting the volume linked to lower cardiovascular risk — often more motivating than "minutes exercised," because intensity is included. Pair it with your TDEE so movement and intake tell one consistent story.

Building a Sustainable Movement Habit

The best MET plan is one you'll keep. Stack small, enjoyable wins: a walk you like, a sport you'd do anyway, a commute you can partly active. The calculator quantifies them so they count, and the visible weekly total reinforces the habit. Consistency at moderate intensity beats heroic weekend sessions that you abandon by February.

METs and NEAT: The Hidden Calorie Lever

NEAT — non-exercise movement — is the most underrated part of any energy budget. Two people with identical workouts and diets can differ by 500+ kcal/day purely in fidgeting, standing, and walking. MET tracking makes this visible: log a walking commute and watch the weekly total jump. For many, raising NEAT is easier and more sustainable than another hour on the treadmill, and it doesn't trigger the hunger a hard workout does.

Using METs to Break a Plateau

When fat loss stalls, people usually cut food further. Often the smarter move is to add movement. Use the calculator to find 200–300 kcal/day of extra walking or cycling — enough to restart loss without hunger or muscle loss. Because MET totals are concrete, you can experiment: "What if I walk 20 minutes more daily?" and see the number change. That turns plateau-breaking from guesswork into arithmetic.

METs for Active Recovery

Low-intensity movement (a 3–4 MET walk) on rest days speeds recovery by increasing blood flow without adding fatigue. Track it in the calculator so your "rest" day still contributes positively to the weekly total. This is how trained athletes keep weekly volume high without overtraining — the easy days count too.

Making MET Tracking Stick

Pick three activities you actually enjoy and log them weekly. The calculator's sum becomes a number you want to protect, like a savings balance. Over months, that gentle accountability compounds into real, visible change — and it pairs perfectly with your TDEE target so output and intake finally agree.

METs and the "Exercise Snack"

Short bursts — a 10-minute walk, a flight of stairs — count. Logged in METs, they add up to a meaningful weekly total without a block of gym time. For busy people, these snacks are the realistic path to the movement volume linked to better health, and the calculator makes them visible instead of forgotten.

Turning METs Into a Workable Weekly Plan

A MET total is only useful if it becomes a plan. A common, evidence-aligned target is roughly 500–1000 MET-minutes per week — the equivalent of about 150 minutes of moderate activity (4–6 METs) or 75 minutes of vigorous (7+ METs). The calculator lets you stack activities honestly: a 30-minute walk at 3.5 METs, a 45-minute lift at 6 METs, and a weekend hike at 8 METs each contribute their own slice, and the weekly sum shows whether you cleared the bar without guessing.

The win is visibility. Most people underestimate light activity and overestimate hard sessions; logging in METs removes both errors. Once you see your real weekly volume, you can close gaps with strength work that also protects muscle, or simply add steps to lift the total. Then connect the dots with TDEE: the MET total is the "activity" slice of your energy burn, so a strong week and a strong TDEE estimate should agree. When they do, your calorie plan finally rests on measured movement instead of hope.