Food kilocalorie
A food kilocalorie is the energy needed to raise the temperature of one kilogram of water by one degree Celsius, used to express food energy.
4.184 kJEnergyEveryday quantities
Food kilocalorie vs Phone battery
What are they, and what does the difference actually look like?
Two things. One honest scale.
Meet the pair
What these two things are
Phone battery
A phone battery stores electrical energy to power a mobile phone.
54 kJEnergyPhone battery has about 12.9 times the energy of Food kilocalorie.
01
Food kilocalorie4.184 kJEnergy
02
Phone battery54 kJEnergy
Bar length represents energy. Equal energy does not imply the same temperature, power or usefulness.
Measurements, assumptions & sources +
Food kilocalorie
One thermochemical kilocalorie, the unit commonly written Calorie on food labels.
Defined examples — our methodology
The marked energy is calibrated. Unmeasured illustration details are representative.
Phone battery
A defined 15 Wh stored-energy battery. Actual devices and usable energy vary.
Defined examples — our methodology
The marked energy is calibrated. Unmeasured illustration details are representative.
Change the comparison
Put something else beside it.
Measurement details
Why these numbers?
The visual compares energy with energy. The records below preserve each value’s basis and caveats.
Food kilocalorie
4.184 kJEnergy · defined energy model
One thermochemical kilocalorie, the unit commonly written Calorie on food labels.
Phone battery
54 kJEnergy · defined energy model
A defined 15 Wh stored-energy battery. Actual devices and usable energy vary.
- Comparing
- Energy ↔ Energy
- Relative size
- Phone battery is larger on this measurement by a factor of about 12.9.
How to read the visual
The labelled spans and stored measurements determine the scale; unmeasured illustration details do not.
- Food kilocalorie is labelled defined energy model; treat the displayed value as a comparison anchor rather than false precision.
- Phone battery is labelled defined energy model; treat the displayed value as a comparison anchor rather than false precision.
There’s always another scale
Follow your curiosity.
EnergyFood kilocalorie4.184 kJA food kilocalorie is the energy needed to raise the temperature of one kilogram of water by one degree Celsius, used to express food energy.EnergyPhone battery54 kJA phone battery stores electrical energy to power a mobile phone.
EnergyElectric car battery216 MJAn electric car battery stores energy to power an electric vehicle.
EnergyOne second of sunlight3.828 × 10¹¹ PJThe total energy emitted by the Sun in all directions over one second.Side by side
Another point of view.
