Category · 8 units

Energy

Energy converter - convert between joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours, electronvolts and BTU.

Active unit

joules · ≈ 100 J (base)

All units

7 results
  • Jjoule100
How we calculated this
Target:
Formula
kJ = J × 0.001
Calculation
100 × 0.001 = 0.1
Factor
× 0.001

Popular pairs

Good to know

Related articles

A glowing emerald doughnut with a battery-and-lightning symbol at its centre, wrapped in a geometric grid, against a cosmic nebula in violet and magenta
Energy

How much energy is in a doughnut — calories, joules and kilowatt-hours

A calorie on your plate, a joule in the lab and a kilowatt-hour on your electricity bill all describe exactly the same thing: the ability to do work. One traditional doughnut holds about 407 watt-hours of energy — enough to run an efficient LED for more than a day, or charge a smartphone nearly 24 times. Here is how a single pastry ties together nutrition, physics and your power bill.

13 min

Popular categories

Each category has its own color and dedicated converter.

See all categories →
8 units
Length
From millimeters to miles — SI and imperial units.
8 units
Mass
Grams, kilograms, pounds, ounces and tons.
8 units
Volume
Liters, milliliters, gallons and cups.
4 units
Temperature
Celsius, Fahrenheit and Kelvin.
7 units
Area
Square meters, hectares, acres and square feet.
9 units
Time
Seconds, minutes, hours, days and years.
6 units
Data (SI)
Bits and bytes in the decimal system (kB, MB, GB).
6 units
Speed
Meters per second, km/h, miles per hour and knots.