Calories Burned Calculator

How we estimate calorie burn

Activity modes use MET (metabolic equivalent of task) from published compendiums: Calories = MET × weight in kg × duration in hours. Steps mode estimates distance from stride length (about 0.413 × height in inches) then applies a walking MET band for your chosen pace.

Your resting burn is separate: the Daily burn tab uses Mifflin-St Jeor for BMR and standard multipliers for activity level (same family of factors as our Calorie Calculator).

What is MET in relation to calories burned?

MET stands for metabolic equivalent of task. One MET is roughly the oxygen and energy cost of sitting quietly at rest. When an activity is listed as, say, 5 METs, that means your body is working at about five times that resting rate for that type of movement - not a perfect match for every person, but a standardized way to compare activities.

For calorie burn, MET is plugged into a simple model: kilocalories ≈ MET × body weight (kg) × time (hours). Heavier people burn more for the same MET and duration; longer or harder sessions (higher MET) burn more. Published tables (such as the Compendium of Physical Activities) supply average MET scores for walking speeds, sports, chores, and desk work - this calculator uses that same idea so you can estimate energy for a session without a lab.

MET does not capture every factor (fitness, heat, hills, technique), so treat results as ballpark estimates.

Is kcal the same as calorie?

In nutrition and fitness, the word "calorie" on food labels and in apps almost always means a kilocalorie (1,000 of the tiny physics "calories" that heat one gram of water by 1°C). Writing kcal makes that explicit: one kcal is the same as one dietary Calorie (capital C) you see on packaging.

This page uses kcal for burn and daily energy numbers so it matches how people plan meals and compare to TDEE or intake goals.

Fitness tracker accuracy (Apple Watch, Garmin, Fitbit)

Wrist devices estimate burn from heart rate, motion, and your profile. Independent lab work generally shows heart rate from wrist sensors can be fairly good during steady cardio, while energy expenditure (calories) often disagrees substantially with indirect calorimetry - the gold standard for measuring oxygen uptake and converting it to kcal.

• Apple Watch: In a diverse 60-person treadmill study, median heart-rate error was often modest, but no device kept energy-expenditure error under 20% versus indirect calorimetry across sitting, walking, running, and cycling; walking was the hardest stage for several brands (Shcherbina et al., 2017, J Pers Med).
• Across brands: A systematic review of 65 validation papers reported mean absolute percentage error over 30% for energy expenditure for every wrist-worn brand pooled in that outcome - authors concluded none of the tested devices proved accurate for EE (Germini et al., 2022, J Med Internet Res).
• Garmin / Fitbit: Same caveats - useful for steps and training load trends; calorie numbers are model-dependent and can miss intervals, strength work, and non-steady HR.

Use trackers for trends and motivation; combine with MET-based calculators when you need a second opinion on a specific session.

Does walking 1 mile burn the same calories as running 1 mile?

Not always - and the question hides two different comparisons. Total kilocalories for a mile depend on your weight, pace, incline, and whether you count only the extra burn above resting metabolism. Running the mile in a few minutes is much higher kcal per minute than a 20-minute walk; for kcal per mile, lab studies disagree in instructive ways.

When researchers fixed treadmill speeds so that walking (~1.4 m/s) and running (~2.8 m/s) each covered 1600 m, running cost more total energy than walking in the same session setup (Hall et al., 2004, Med Sci Sports Exerc). That design answers “walk slowly vs run faster for one mile,” not every real-world pairing.

In contrast, when adults used preferred walking speeds or a marathon runner’s typical race pace for a mile, absolute gross kcal for the mile clustered in a similar band (on the order of ~90–100 kcal) across normal-weight walkers, overweight walkers, and runners; differences shrank further when expressed per kilogram of fat-free mass (Wilkin et al., 2010, J Strength Cond Res).

Practical takeaway: treat “same mile, same calories” as sometimes roughly true for gross energy at self-selected paces, but not a physics law - use the Activity tab with your actual speeds and duration instead of assuming parity.

Steps to calories: quick mental math

A coarse rule many coaches cite is ~0.04–0.05 kcal per step for adults, but weight, pace, incline, and stride length move that band. The Steps tab above uses your height for stride and your selected pace for MET - closer to a personalized answer than a single fixed multiplier.

Popular searches like '10k steps calories' or 'calories per 1000 steps' are exactly what the steps mode and comparison table address.

Walking distance reference table

Approximate calories burned walking at a moderate pace (3.0–3.5 mph) by distance — useful for searches like "calories burned walking X miles."

Based on MET 3.5 (moderate ~3.0 mph pace). Brisk walking (3.5–4.0 mph, MET 4.3–5.0) burns approximately 20–40% more per mile.