Energy & Power Unit Converter

Convert thermodynamic energy, nutritional calories, and mechanical horsepower in real time.

Converted Output
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All Energy & Power Units

Unit Value

How to Use Energy Converter

  1. Select whether you are converting Energy (Work) or Power (Rate of Work).
  2. Enter the numerical magnitude in the input field.
  3. Choose your origin and destination units.
  4. Copy the result or inspect the comparative overview table.

Technical Specifications & How It Works

Energy represents total capacity to do work (measured in Joules), while Power represents the rate at which energy is expended (1 Watt = 1 Joule per second).

A nutritional food Calorie (with a capital C) is actually a kilocalorie (1,000 thermodynamic gram calories or 4,184 Joules).

All units convert client-side with zero network tracking.

Frequently Asked Questions

How many Joules are in a food Calorie?

One dietary Calorie (kcal) equals exactly 4,184 Joules (4.184 kJ).

How many Watts are in one Horsepower?

One mechanical horsepower (HP) is standardized as approximately 745.7 Watts.

How many Joules are in a Kilowatt-hour (kWh)?

One kilowatt-hour equals exactly 3,600,000 Joules (3.6 Megajoules).

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