Energy
Convert Joule to Calorie
From
To
Common Conversions:
What is Unit Conversion?
Unit conversion is the process of converting a quantity expressed in one set of units to another set of units. This is essential for scientific research, engineering, commerce, and daily life, ensuring consistency and accuracy across different measurement systems.
Purpose of Energy Conversions
Energy conversions are crucial in science, engineering, and daily life. They help us understand and compare different forms of energy, from calories in food to joules in physics, supporting efficient energy use and innovation.
Projects That Require Energy Conversions
Energy conversions are essential in renewable energy projects, battery design, and nutrition labeling. Scientists and engineers use them to compare energy sources and optimize systems.
Historical Background
The concept of energy has evolved from classical mechanics to modern physics. Early units like the calorie and joule were defined for practical and scientific use, reflecting advances in understanding work and heat.
| Unit | In Joules (J) | Real-world Example |
|---|---|---|
| Joule | 1 J | Energy to lift an apple 10 cm |
| Calorie | 4.184 J | Energy to raise 1g of water by 1°C |
| British thermal unit | 1,055 J | Energy to heat a pound of water by 1°F |
| Electronvolt | 1.60218e-19 J | Energy of an electron in a 1V field |
| Therm | 105,506,000 J | Energy to heat a home for a day |
| Erg | 1e-7 J | Energy to move a mosquito's wing |
| Foot-pound | 1.35582 J | Energy to lift an apple 1 foot |
| Calorie (IT) | 4.1868 J | International steam table calorie |
| Calorie (15°C) | 4.1855 J | Energy to raise 1g of water from 14.5°C to 15.5°C |
| Calorie (20°C) | 4.1819 J | Energy to raise 1g of water from 19.5°C to 20.5°C |
| Calorie (25°C) | 4.1785 J | Energy to raise 1g of water from 24.5°C to 25.5°C |
| Quad | 1.055e18 J | Energy used by a small country in a year |
| Therm (energy) | 1.055e8 J | Energy to heat a home for a day |
| Ton of TNT | 4.184e9 J | Energy of a large explosion |
| Hartree | 4.3597e-18 J | Energy of an electron in a hydrogen atom |