Energy Converter

Convert between chemical, electrical and physical energy units.

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Related Conversions
1 Wh → J 5 Wh → J 25 Wh → J 100 Wh → J 340 Wh → J 468 Wh → J 510 Wh → J 680 Wh → J 1,000 Wh → J 1,700 Wh → J 4,250 Wh → J 8,500 Wh → J
Reverse Conversions
1 J → Wh 5 J → Wh 25 J → Wh 383 J → Wh 500 J → Wh 510 J → Wh 680 J → Wh 1,000 J → Wh 1,700 J → Wh 2,500 J → Wh 4,250 J → Wh 25,000 J → Wh
More Energy Conversions
1 GJ → kWh 1 GJ → MJ 1 MJ → BTU 100 J → cal 1 MJ → kWh 2 GJ → MJ 2 MJ → BTU 100 kJ → kcal 1 kWh → cal 10,000 J → kJ

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Popular Conversions

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Common Benchmarks

AA battery 10 kJ
Gasoline liter 34 MJ
Slice of bread 330 kJ
Microwave 10 minutes 0.17 kWh
Phone battery 40 kJ
Laptop full charge 200 kJ

Formula

J = Wh × 3600

Example

Example: convert 425 watt-hours to joules.

425 Wh = 1530000 J

Conversion table

watt-hours (Wh) joules (J)
1 Wh 3600 J
2 Wh 7200 J
5 Wh 18000 J
10 Wh 36000 J
20 Wh 72000 J
50 Wh 180000 J
100 Wh 360000 J

Explanation

These are both units.

How to convert watt-hours to joules

  1. Start with the value in watt-hours (Wh).
  2. Multiply it by 3600.
  3. The result is the measurement in joules (J).

Example: 425 Wh → 1530000 J

Frequently Asked Questions

How much is 425 watt-hours in joules?

425 watt-hours equals 1530000 joules.

How many joules is 1 watt-hour?

1 watt-hour equals 3600 joules.

How many watt-hours is 1 joule?

1 joule equals 0.000277777778 watt-hours.

What is the difference between watt-hours and joules?

Both measure energy in SI. The main difference is usually scale: some units are convenient for smaller values, while others are used to express larger values more practically.

Where are watt-hours and joules used?

They are used in physics and engineering to measure work, energy, and heat; the most practical unit depends on the magnitude.

Why does 1 watt-hour equal 3600 joules?

Because the units are defined with a fixed relationship. To convert watt-hours to joules, multiply by that factor.