Scenario

Running Calories Per Mile — The 100-Calorie Rule

Learn how many calories you burn running per mile and why the 100-calorie rule is a handy shortcut. Our calculator adjusts for your body weight for more accurate results.

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Your Details

kg
miles
min/mile

Calories Burned Running

Total Calories

625kcal

Calories per Mile

125kcal

Speed

6mph

Summary: Running 5 miles at a pace of 10:00 /mile burns approximately 625 kcal for a 70 kg person.

Calories by Running Pace (5 mi)

Calories by Distance (10:00 /mile)

The formula

The formula

How Running Calories Are Calculated

Calories burned while running are estimated using the American College of Sports Medicine (ACSM) running formula, which calculates oxygen consumption (VO2) based on running speed, then converts it to calorie expenditure. The ACSM formula is the standard for running energy expenditure estimation and is used in most clinical and research settings.

The formula models the relationship between running speed and oxygen demand: faster running requires more oxygen, which means more calories burned. Unlike walking, where the MET approach is used, the ACSM formula for running uses a linear VO2-to-speed relationship that is accurate across a wide range of running speeds.

The Formula

VO₂ = 0.2 × Speed(m/min) + 3.5
Calories/min = VO₂ × Weight(kg) ÷ 200
Calories/mile = Calories/min × Pace(min/mile)

Speed is converted from pace to meters per minute

VO₂ is expressed in mL/(kg·min)

Formula Source

This calculator uses the **ACSM running metabolic equation** from **American College of Sports Medicine, ACSM's Guidelines for Exercise Testing and Prescription (11th ed.)**, published by **Wolters Kluwer in 2021**.

Reference URL: https://pubmed.ncbi.nlm.nih.gov/21681120/

Last Verified: 2026-07-30

Worked Example

A 70 kg person runs 5 miles at a 10 min/mile pace (6 mph). Speed = 6 × 26.8224 = 160.9 m/min. VO₂ = 0.2 × 160.9 + 3.5 = 35.68 mL/(kg·min). Calories/min = 35.68 × 70 ÷ 200 = 12.5 kcal. Calories per mile = 12.5 × 10 = 125 kcal. Total calories = 125 × 5 = 625 kcal. If the same person runs at a faster 7 min/mile pace (8.57 mph), the per-mile burn rises to approximately 140 kcal per mile — a 12% increase in per-mile burn for a 43% increase in speed.

FAQ-Style Explanations

Does running faster burn more calories per mile? Yes, but the difference is smaller than most people think. The per-mile difference between a 10 min/mile pace and a 7 min/mile pace is about 10–15%. The bigger factor in total calories is total distance.

Why does the ACSM formula use VO₂? The ACSM formula is derived from the relationship between oxygen consumption and running speed. This is the same relationship that underlies the MET system, but the ACSM formula is specifically calibrated for running.

Does running on a treadmill burn the same calories? Treadmill running typically burns 5–10% fewer calories due to the lack of air resistance and terrain changes. Setting the treadmill to a 1% incline can compensate for this difference.

Known Limitations

  • The ACSM formula assumes level ground running. Uphill running increases VO₂ demand by roughly 3–5% per degree of incline, and downhill running decreases it.
  • Individual variation in running economy can affect calorie burn by ±10–15% — a more efficient runner burns fewer calories at the same speed.
  • The formula does not account for the afterburn effect (EPOC), which adds a modest 6–15% to total calorie expenditure following intense running sessions.
Scenario guide

Scenario guide

The 100-Calorie Rule

A widely used rule of thumb states that running burns roughly 100 calories per mile for a 150-pound (68 kg) runner. This estimate is remarkably close to the actual energy expenditure for average-sized adults on flat ground. The 100-calorie figure comes from applying the 1 kcal/kg/km formula to a 68 kg runner, which yields about 104 calories per mile since one mile equals 1.609 kilometers. For most casual fitness tracking purposes, rounding to 100 calories per mile is a practical and easy shortcut.

Adjusting for Your Weight

The 100-calorie rule is based on a 68 kg body weight, so you need to adjust it proportionally if you weigh more or less. A 50 kg runner burns approximately 73 calories per mile, a 70 kg runner burns about 113 calories, and an 80 kg runner burns roughly 129 calories per mile. You can estimate your per-mile calorie burn by multiplying your weight in kilograms by 1.609, which converts the per-kilometer cost to a per-mile figure. This gives you a personalized number that is far more accurate than the generic 100-calorie estimate.

Converting the km Formula to Miles

The 1 kcal/kg/km rule translates directly to miles using a simple conversion factor. Since one mile equals 1.609 kilometers, you multiply your weight in kilograms by 1.609 to get the calories burned per mile. This conversion keeps the formula universally applicable whether you train in kilometers or miles. For example, a 70 kg runner burns 70 × 1.609 = 112.6 calories per mile, which aligns closely with published metabolic data.

Accuracy and Caveats

While the per-mile calorie rule is convenient, it has important limitations that runners should understand. It does not account for incline, wind resistance, running economy, or terrain type, all of which can shift calorie expenditure by 10-20%. It also assumes a steady-state running pace rather than interval training or hill repeats. For the most accurate personal estimate, combine the per-mile formula with data from a heart rate monitor or GPS-enabled running watch that measures oxygen consumption and movement efficiency.

FAQ

Frequently Asked Questions

How many calories does running 1 mile burn?
Running 1 mile burns approximately 100 calories for a 68 kg (150 lb) runner, based on the standard 1 kcal/kg/km formula converted to miles.
How do I adjust the 100-calorie rule for my weight?
Multiply your weight in kilograms by 1.609 to get your per-mile calorie burn. For example, a 70 kg runner burns about 113 calories per mile.
Does running faster burn more calories per mile?
No, running faster does not significantly change the total calories burned per mile. The energy cost is primarily determined by distance and body weight, not speed.
Is the 100-calorie rule accurate?
The 100-calorie rule is a reasonable approximation for a 68 kg runner on flat terrain. Individual results may vary by 10-20% due to incline, wind, biomechanics, and running economy.
How many calories does a 5-mile run burn?
A 5-mile run burns approximately 500 calories for a 68 kg runner. Adjust by multiplying 5 by your per-mile calorie burn, which equals your weight in kg × 1.609.
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