What does the watts-to-calories calculator do?

It converts your cycling power output into energy. Enter your average power in watts and duration, and it returns the mechanical work done in kilojoules along with the calories you burned, helping you match training effort to nutrition.

How do watts convert to calories burned?

Average watts times duration in seconds gives work in joules, divided by 1,000 for kilojoules. Conveniently, kilojoules of work roughly equal the calories burned, because human cycling efficiency of about 20–25% nearly cancels the kJ-to-kcal conversion factor.

Why do kilojoules roughly equal calories on a bike?

Cyclists are only about 20–25% efficient, so for every kilojoule of mechanical work you actually expend about four to five kilojoules of energy. Since one calorie is about 4.18 kilojoules, the two numbers end up nearly equal, making kJ a handy calorie estimate.

瓦特换算卡路里计算器

把骑行功率换算成功和卡路里

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平均功率 (watts)

骑行的平均功率，例如 200

时长（分钟）

骑行时长（分钟），例如 60

瓦特换算卡路里计算器

功率计显示 watts 和千焦，但大多数人习惯用卡路里思考。输入你的平均功率和骑行时长，本计算器会按约24%的典型骑行效率，返回以千焦计的机械功和你消耗的卡路里。可以用它把骑行与营养摄入对照、比较不同强度，或理解为什么在自行车上功的千焦与消耗的卡路里大致相等。

机械功是功率 × 时间：watts × 秒得到焦耳，这里以千焦显示。骑行者消耗的能量比这部分功更多，因为肌肉效率只有约24%，其余变成热量。把功除以0.24再换算成千卡，正是“消耗卡路里 ≈ 功的千焦”这一实用经验法则成立的原因。它只计算运动消耗的能量，不含静息代谢，并假设典型的骑行效率。

常见问题

What does the watts-to-calories calculator do?: It converts your cycling power output into energy. Enter your average power in watts and duration, and it returns the mechanical work done in kilojoules along with the calories you burned, helping you match training effort to nutrition.
How do watts convert to calories burned?: Average watts times duration in seconds gives work in joules, divided by 1,000 for kilojoules. Conveniently, kilojoules of work roughly equal the calories burned, because human cycling efficiency of about 20–25% nearly cancels the kJ-to-kcal conversion factor.
Why do kilojoules roughly equal calories on a bike?: Cyclists are only about 20–25% efficient, so for every kilojoule of mechanical work you actually expend about four to five kilojoules of energy. Since one calorie is about 4.18 kilojoules, the two numbers end up nearly equal, making kJ a handy calorie estimate.