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에너지 변환기

무료 에너지 변환기 — 줄, 킬로줄, 킬로와트시, 칼로리, 킬로칼로리, BTU 및 전자볼트. 물리학, 영양학, 공학용.

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편집자 노트

Understanding · Heat, work, electricity — all the same thing.

이 심층 챕터는 현재 영어로만 제공됩니다. 위의 변환 도구는 귀하의 언어로 작동하지만, 긴 설명 글은 아직 번역되지 않았습니다.

자주 묻는 질문

Quick answers.

Calorie or kilocalorie on food labels?

On food labels in the US the 'Calorie' (capital C) is actually a kilocalorie (1,000 small calories). Most other countries label them as kcal or kJ to avoid confusion.

How much is 1 kWh?

1 kilowatt-hour = 3.6 million joules. It's the energy you'd use running a 1,000 W appliance (like a microwave) for one hour.

What's a BTU?

A British Thermal Unit is the energy needed to heat one pound of water by 1 °F — about 1,055 joules. Used widely in HVAC and heating ratings.

Is the converter free?

Yes — free, no signup, runs in your browser.

How precise are the conversions?

Double-precision floats — accurate to 15 significant digits, well past anything you'll need in practice.

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