Running Calorie Calculator
Not a rough formula like "distance × weight × 1.036," but the ACSM running formula for real accuracy.
It factors in grade and post-exercise burn (EPOC), too.
What does that add up to in food? A friendly comparison
Why the ACSM running formula is accurate
Most sites use kcal = 1.036 × distance(km) × weight(kg) — a rough approximation assuming flat ground and average pace. In reality oxygen efficiency changes with pace, and grade shifts calories a lot.
ACSM (American College of Sports Medicine) Running formula
VO2 (mL/kg/min) = 0.2 × speed(m/min) + 0.9 × speed(m/min) × grade + 3.5Total oxygen uptake(L) = VO2 × weight(kg) × time(min) / 1000kcal = oxygen uptake(L) × 5(1L O₂ ≒ 5kcal, assuming carb-dominant fuel)
This formula holds above 80 m/min (4.8 km/h). Below that, a separate walking formula applies.
MET conversion
MET = VO2 ÷ 3.5(1 MET = resting oxygen consumption)- Running 8 km/h ≒ 8.3 MET, 12 km/h ≒ 12.5 MET, 16 km/h ≒ 16 MET
EPOC (Excess Post-exercise Oxygen Consumption) — calories burned after exercise
- The harder the effort, the more oxygen you keep using afterward (the afterburn).
- Borsheim & Bahr (2003) meta-analysis: after typical running, an extra 6–15% burn lasts for 12–24 hours.
- This calculator applies 6% (LSD) to 15% (race) dynamically based on pace.
Why does the calorie figure differ from other sites?
- 1km × kg × 1.036: an average approximation (simplest)
- MET-only calculators: simple, but weak on grade and accuracy
- ACSM formula (this calculator): factors in pace + weight + grade, the exercise-physiology textbook standard
Calories are the result; consistency is the cause
30 minutes of jogging a day for a year ≈ a 5 kg difference. But staying consistent alone for a year is genuinely hard. People who run with a crew are 3× more likely to still be running six months later.
