SI prefix reference table

This page requires Javascript for the above reference table and the calculator below to work.

You must input the numbers in plain numeric form for this calculator to work. So instead of saying 1 kilojoule, simply enter 1e3.

Input

Output

Notes

• The output is always rounded to two places after the decimal point. Due to further intermediate rounding done in the calculations, expect error - this just gives you a ballpark estimate of what the conversions look like.
• By kilograms of matter, I mean how much you'd get from complete conversion to energy.
• The liters of ice measurement is approximately how much heat it takes to melt that amount of frozen water at a uniform 0 degrees C.
• The fusion and fission numbers assume all the fuel is pure and entirely used up.
• For the liters of water, I am assuming it starts at 20 degrees C and is raised to the boiling point then evaporated completely into steam at 100 degrees C. (As a note, it is about 16 kJ less per kilogram if the water starts at body temperature.)
• I assume the density of water is always 1 kg / liter. Remember, this is meant to be just a ballpark estimate anyway.
• Cubic meters of vaporized iron assumes it starts at room temperature.

Common values

• A rifle bullet has about 1 kJ of kinetic energy.
• A tonne of TNT is defined to give 4.18 GJ of energy.
• See also: table at Atomic Rockets.

Author: Adam D. Ruppe

Written: 22 July 2008

I release this page into the public domain; do whatever you want with it.