Energy Converter

What is Energy?

Energy is the capacity to do work. It can be measured in various units including joules (SI unit), calories (for food and chemistry), BTU (for heating/cooling), and watt-hours (for electricity).

How to Use This Converter

Choose your energy conversion from the options below. Enter your energy value and convert between different energy units instantly.

Common Uses

• Converting food calories to joules for scientific calculations
• Converting electricity usage between kWh and other units
• Converting heating/cooling capacity in BTU
• Converting exercise energy expenditure

Quick Reference Tips

• 1 calorie = 4.184 joules
• 1 kilocalorie (food calorie) = 1000 calories
• 1 kWh = 3,600,000 joules
• 1 BTU ≈ 1055 joules