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Thread: kJ to Calories

  1. #1
    RacingBear UmneyDurak's Avatar
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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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    Banned. Turboem1's Avatar
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    To convert kJ to Calories multiply the amount by .239

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    Senior Member raptor3x's Avatar
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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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