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Old 07-23-07, 09:25 AM   #1
UmneyDurak
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kJ to Calories

How do you convert kJ reported by a power meter to calories? The manual said, calories burned is roughly roughly .85-.95 of total kJs reported for the ride. A book I am reading says amount of Calories burned is +/- 10% of total kJ, interesting part is +. Then I remember reading something that had a formula which result came out very close to 1:1 ratio. So is this the case of them all being right, and it depends on individual?

Thanks.
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Old 07-24-07, 05:47 AM   #2
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To convert kJ to Calories multiply the amount by .239
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Old 07-24-07, 06:52 AM   #3
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Quote:
Originally Posted by UmneyDurak View Post
How do you convert kJ reported by a power meter to calories? The manual said, calories burned is roughly roughly .85-.95 of total kJs reported for the ride. A book I am reading says amount of Calories burned is +/- 10% of total kJ, interesting part is +. Then I remember reading something that had a formula which result came out very close to 1:1 ratio. So is this the case of them all being right, and it depends on individual?

Thanks.

Conveniently enough, you can get a pretty accurate estimate of calories expended by just reading the kJ that you power meter gives you as kCals. This works because 1kCal=~4.4kJ but the average human efficiency is somewhere around 22-23%.
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