Calories Burned Calculator
How it worksEstimate calories for walks, runs, lifts, and more
Free calories burned calculator using MET values and your body weight. Estimate energy cost for walking, running, cycling, swimming, weights, HIIT, and other common activities.
Your details
Using: 70.0 kg
Estimated session burn
Body weight: 70.0 kg
Estimated burn
291 kcal
Compare at 30 min
About this Session burn calculator
Session calorie estimates help you understand the relative cost of different workouts. They are useful for comparing activities — not for precisely “earning” food.
We use MET (metabolic equivalent of task) values similar to those found in exercise science compilations: calories ≈ MET × body weight (kg) × hours.
Real burn varies with pace, terrain, fitness, and efficiency. Machine “calories” displays and wearables use their own models and often disagree.
A calories burned calculator helps compare the relative cost of walks, runs, rides, lifts, and HIIT using MET values scaled to your body weight. Habbeat keeps the formula visible: MET × kg × hours.
Searches for “calories burned walking,” “running calorie calculator,” and “MET calculator” are intent-rich. We cover common activities so you can plan fueling without pretending the number is lab-perfect.
In Habbeat, movement still counts toward your daily score even when the calorie estimate is only approximate — showing up matters more than maximising a MET label.
How to use this free tool
- Add your body weight in Your details — MET math depends on it.
- Pick an activity and duration. We multiply MET × kg × hours to estimate kcal.
- Treat the result as an order-of-magnitude guide when planning recovery and fueling.
Worked examples
- Example: 70 kg person walking ~5 MET for 45 minutes ≈ 5 × 70 × 0.75 ≈ 260 kcal (rough MET estimate).
- Example: The same person running harder (~9–10 MET) for 30 minutes lands higher — but watches may still disagree.
- Example: Strength sessions often look “lower burn” on MET tables yet drive long-term composition change — don’t chase only the calorie number.
Practical tips
- Don’t slash diet calories by the full “burned” number every session — estimates overshoot for many people.
- Consistency of training matters more than maximising estimated burn.
- If you feel wiped, prioritise sleep and protein over chasing higher MET numbers.
Limitations & caveats
- MET tables are population averages, not your exact burn.
- Wearables and gym machines use different models — expect mismatches.
- Eating back every estimated calorie often stalls fat loss.
Frequently asked questions
What is a MET?
One MET roughly equals resting energy cost. A 5 MET activity uses about five times resting energy for that duration, scaled by body weight.
Why doesn’t this match my watch?
Devices use heart rate, personal profiles, and proprietary models. MET tables are population averages. Expect differences of 10–30% or more.
Should I eat back workout calories?
Often only partially, if at all — especially if fat loss is the goal. Many coaches prefer a steady daily target that already accounts for training days.
How many calories does a 30-minute walk burn?
It depends on pace and body weight. A moderate walk might land a few hundred kcal for many adults on MET math — use the calculator with your weight for a tighter estimate.
Is HIIT always better for burn?
HIIT can be efficient, but total weekly volume, recovery, and adherence matter more. Easy aerobic work still drives big weekly totals.
Can I trust treadmill calorie readouts?
Treat them as rough. Entering weight helps some machines; they still miss individual efficiency. Prefer trends over exact digits.
Related free calculators
Heart Rate Zone Calculator
Train smarter with age-based Zone 1–5 targets
Running Pace Calculator
Convert distance and time into pace — or race finish times
BMR & TDEE Calculator
Estimate resting burn and daily calorie maintenance
Looking for something else? Browse all Habbeat fitness tools, build a diet plan, or explore Habbeat features.
All toolsDisclaimer: These tools provide general estimates only. They are not medical advice. For health conditions, pregnancy, or personalised nutrition, speak with a qualified professional.