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There are numerous online calorie calculators for running (e.g. from runners world). What is the underlying formula for calculating energy expenditure while running? This post has an excellent answer for the analog of calories burned throughout the day.

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2 Answers 2

I googled a bit and stumbled upon the following formula. The source claims it's from Journal of Sports Sciences.

Men use the following formula:

Calories Burned = [(Age x 0.2017) + (Weight x 0.09036) + (Heart Rate x 0.6309) -- 55.0969] x Time / 4.184.

Women use the following formula:

Calories Burned = [(Age x 0.074) -- (Weight x 0.05741) + (Heart Rate x 0.4472) -- 20.4022] x Time / 4.184.

Calculation

For example, here’s my formula based on a 49 year old male weighing 155 for a workout where my heart rate averages about 148 bpm throughout a 60-minute FitCamp workout.

[(49 x 0.2017) + (155 x 0.09036) + (148 x 0.6309) – 55.0969] x 60/4.184 =

[9.8833 + 14.0058 + 93.3792 – 55.0969] x 14.3403 = 891.47 calories (or 15 kcal/min)

This is the most comprehensive (and quite recent) formula I could find, which takes in account many factors that others don't (age, heart rate etc.). Hope it helps :)

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This looks great! Thanks. I just don't get why there aren't more comparable things for running explicitly. –  zhermes Mar 27 at 17:11
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It depends, there are quite a few different formulas available, depending on who was doing the research, and when it was performed. To some extent, the method used to determine the calories burned can have an effect on the formula.

http://www.stanford.edu/~clint/Run_Walk2004a.rtf

That is a link to a published study from Syracuse University, comparing several different methods of calculating calorie burn. If you are looking at a watch, treadmill or other device that is measuring it for you, somewhere in their literature they should be describing what method they are using.

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