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Watt-hours to Joules Converter

Free instant Wh → J converter. No signup, no uploads — everything is calculated privately in your browser.

1 Wh = 3,600 joules

Free and instant — every calculation runs in your browser. Nothing is uploaded.

Quick Answer

1 watt-hour equals 3,600 joules. To convert watt-hours to joules, multiply the value by this factor.

Key Facts

  • Reverse: 1 joule = 0.000277778 watt-hours.

Watt-hours to Joules Formula

Formula: value × 3,600

Prefer to skip the math? Type any value in the converter above and it converts instantly.

Watt-hours to Joules Conversion Table

Watt-hours (Wh)Joules (J)
1 Wh3,600 J
2 Wh7,200 J
5 Wh18,000 J
10 Wh36,000 J
25 Wh90,000 J
50 Wh180,000 J
100 Wh360,000 J
250 Wh900,000 J
500 Wh1,800,000 J
1,000 Wh3,600,000 J

Frequently Asked Questions

How do I convert watt-hours to joules?

Enter the value above and the result appears instantly — the calculation runs entirely in your browser. Formula: value × 3,600.

What is the exact watt-hours to joules conversion factor?

1 watt-hour = 3,600 joules (shown to 6 significant figures — the converter itself computes at full precision). The reverse factor is 1 joule = 0.000277778 watt-hours.

What are some common watt-hours to joules conversions?

1 Wh = 3,600 J; 10 Wh = 36,000 J; 100 Wh = 360,000 J. Use the full conversion table below for more reference values.

Is a calorie the same as a food Calorie?

No — and the capital letter matters. A food Calorie (with a capital C) is a kilocalorie: 1,000 small calories. This converter treats them correctly: 1 kcal = 4.184 kJ = 1,000 cal. Energy labels on food almost always mean kilocalories, even where the label just says "calories".

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