Walking (brisk, 6.5 km/h) (MET: 5) for 30 min
Total Calories Burned
175kcal
Scenario
Calories Burned Running — Calculator by Distance & Pace
Calculate calories burned running using the ACSM equation and the 1 kcal per kg per km rule. Includes calorie burn by distance, pace adjustments, and comparison to walking.
Interactive Calculator
Your Details
kg
minutes
Calories Burned
Formula: MET × Weight(kg) × Duration(hours)
= 5 × 70 kg × 0.50 h
= 175 kcal
Activity Comparison (30 min)
Intensity Level
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Light
Moderate
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Very Vigorous
Activity MET Reference
MET values from the Compendium of Physical Activities. One MET = 1 kcal/kg/hour at rest.
Walking (brisk, 6.5 km/h) has a MET value of 5, meaning it burns 5× the energy of resting.
The formula
The formula
How Calories Burned Are Calculated
Physical activity energy expenditure is most commonly estimated using the MET (Metabolic Equivalent of Task) method. One MET is defined as the rate of energy expenditure while sitting quietly at rest — approximately 1 kcal per kilogram of body weight per hour. Every activity in the Compendium of Physical Activities is assigned a MET value that expresses how many times more energy it requires compared with resting. For example, brisk walking has a MET value of about 4.3, meaning it burns about 4.3 times the energy of resting.
The MET approach is the standard framework used by clinical exercise physiologists, fitness trackers, and most research studies because it is simple, does not require any laboratory equipment, and produces estimates that are accurate enough for general guidance at the group level. It is important to remember that the result is an estimate, not a precise measurement of your individual metabolism.
The MET Formula
Calories = MET × Weight(kg) × Duration(hours)
MET = metabolic equivalent value of the activity (from the Compendium)
Weight = your body weight in kilograms
Duration = time spent doing the activity in hours
Because heavier bodies require more energy to move, the same activity burns more calories for a heavier person — the formula captures this by multiplying by body weight. MET values range from 0.9 (sleeping) to 18 or more (running at very high speed), and the Compendium lists hundreds of coded activities with their corresponding values.
Formula Source
This calculator uses **MET values from the Compendium of Physical Activities** by **Ainsworth BE, Haskell WL, Herrmann SD, et al., Medicine & Science in Sports & Exercise** published in **2011**.
Reference URL: https://pubmed.ncbi.nlm.nih.gov/21681120/
Last Verified: 2026-07-30
Worked Example
Suppose you weigh 70 kg and go for a 45-minute (0.75 hour) run at 10 km/h, an activity with a MET value of roughly 9.8. Calories = 9.8 × 70 × 0.75 = 514 kcal. If instead you walked at a leisurely 2.5 km/h (MET ≈ 3.0) for the same duration: 3.0 × 70 × 0.75 = 158 kcal. Notice that the same body weight and duration produce very different results — the MET value of the activity is the single largest driver of total calorie burn.
FAQ-Style Explanations
Is a higher MET always better? Higher MET values mean more calories per minute, but they also mean more fatigue and a higher injury risk if you are not conditioned for that intensity. Sustainable exercise you can do consistently usually produces more total weekly calorie burn than sporadic all-out sessions.
Why do fitness watches disagree with this calculator? Watches estimate a personal MET value by combining your heart rate, pace, and personal profile, and they tend to run ±20–30 percent away from formal estimates. Neither source is exact — treat both as a directional guide for planning rather than a precise bill of calories.
Does the afterburn (EPOC) inflate my burn? Intense exercise does elevate post-exercise oxygen consumption, but the additional calories are modest relative to the session itself — typically 6 to 15 percent extra at the most, not the large numbers some marketing claims suggest.
Known Limitations
- MET values are population averages. Individual results vary by fitness level, body composition, terrain, and exercise efficiency — typically within ±20 percent.
- The estimate does not account for age, sex-specific metabolic differences beyond weight, or the intensity drift within a session (a run that starts easy and finishes hard is approximated by a single MET value).
- For weight-loss planning, exercise calories should be treated as an upper-bound estimate — many people compensate unconsciously by moving less or eating more after exercise.
Scenario guide
Scenario guide
The Running Calorie Formula: 1 kcal per kg per km
The simplest and most widely used running calorie estimate is 1 kilocalorie burned per kilogram of body weight per kilometer run. A 70 kg runner completing a 10 km run burns approximately 70 × 10 × 1 = 700 kcal. A 70 kg runner completing a half marathon (21.1 km) burns approximately 1,477 kcal. This formula is remarkably consistent across paces from 5:00/km to 8:00/km, because while slower paces last longer, the energy cost per kilometer remains approximately constant. Running a 5 km run in 25 minutes (5:00/km) burns roughly the same total calories as running it in 40 minutes (8:00/km) for the same person — both approximately 350 kcal. Pace matters less than distance for calorie burn, making this a convenient and reliable estimator for most running workouts.
The ACSM Running Equation for Precision
The American College of Sports Medicine provides a more precise running VO2 equation: VO2 (ml/kg/min) = 0.2 × speed (m/min) + 0.9 × speed (m/min) × grade + 3.5. For flat running (grade = 0), this simplifies to VO2 = 1.1 × speed. For a runner at 12 km/h (200 m/min), VO2 = 1.1 × 200 = 220 ml/kg/min, which translates to 220/1000 × weight in kg = 15.4 kcal/min for a 70 kg runner. Over 30 minutes, this equals 462 kcal. The ACSM equation accounts for incline, where each 1% of grade adds roughly 1.5-2% to calorie expenditure. Running at 12 km/h on a 5% incline increases VO2 to approximately 253 ml/kg/min, or roughly 558 kcal per 30 minutes — a 21% increase over flat running. Use the HealthCalc Running Calories Calculator to apply the full ACSM equation with your exact speed, weight, and grade for the most precise estimate.
Factors Affecting Running Calorie Burn
- Body weight: The single largest factor. A 90 kg runner burns approximately 29% more calories than a 70 kg runner at the same speed and distance. Heavier runners are less mechanically efficient but expend more energy per step.
- Running speed: Faster paces slightly increase calorie burn per kilometer due to greater air resistance at speeds above 14 km/h. The increase is modest: roughly 5-8% more calories per km at 16 km/h compared to 12 km/h, primarily from aerodynamic drag.
- Incline: Uphill running dramatically increases calorie expenditure. Each 1% of grade adds approximately 9-10% to VO2 and calorie burn. Running 5 km on a 5% incline burns roughly 50% more calories than the same distance on flat ground.
- Running efficiency: Trained runners are 10-20% more mechanically efficient than beginners, meaning they burn slightly fewer calories per kilometer. This efficiency gain is one reason elite runners' calorie burn estimates sometimes appear low relative to simple formulas.
- Environmental conditions: Running in hot weather (>30°C) or cold weather (<0°C) can increase calorie expenditure by 5-10% due to thermoregulation demands. Wind resistance at speeds above 12 km/h adds a similar small increase.
Running vs Walking Calorie Burn Comparison
Running burns more calories per minute than walking, but the calorie cost per kilometer is roughly similar. A 70 kg person walking 5 km at 5 km/h takes 60 minutes and burns approximately 266 kcal, while running the same 5 km in 25 minutes burns approximately 350 kcal. Running burns about 32% more calories per kilometer, reflecting the greater biomechanical cost of flight phases and ground impact forces. However, running the same 5 km takes only 25 minutes versus 60 minutes walking, so running burns 14 kcal per minute compared to 4.4 kcal per minute for walking. For time-constrained workouts, running delivers far higher calorie burn per minute, making it the more efficient choice for busy schedules. For low-impact, longer-duration exercise, walking remains a sustainable daily activity that accumulates meaningful calorie expenditure over time. Use the HealthCalc Calories Burned Calculator to compare the calorie cost of running and walking for your specific distance, weight, and time goals.
FAQ
Frequently Asked Questions
A 70 kg runner burns approximately 350 kcal running 5 km, using the simple formula of 1 kcal per kg per km. Heavier runners burn proportionally more: a 90 kg runner burns about 450 kcal for the same 5 km.
Per minute, yes. Per kilometer, only slightly — roughly 5-8% more at very fast paces (16+ km/h) due to air resistance. The primary driver of running calorie burn is distance and body weight, not pace.
A 70 kg person running 1 mile (1.61 km) burns approximately 110-115 kcal. Multiply your body weight in pounds by 0.55 to get an approximate kcal-per-mile burn.
Each 1% of incline grade adds approximately 9-10% to calorie expenditure. Running 5 km on a 5% incline burns roughly 50% more calories than running the same distance flat.
Yes, by about 30%. Running 5 km burns roughly 350 kcal for a 70 kg person, while walking 5 km burns about 266 kcal. Running is also 2-3 times faster, delivering those calories in much less time.
Keep going
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