Equivalent is not interchangeable.

The source uses the exact speed of light constant two hundred ninety nine million seven hundred ninety two thousand four hundred fifty eight meters per second. One kilogram times its square gives about eighty nine point eight seven six petajoules; half a kilogram gives half that number. Bars share four pixels per petajoule. This rest-energy equivalence is unit analysis, not proof of a practical conversion machine, safety case or a way to supply particular construction atoms. For one kilogram, the source divides joules by three point six billion to obtain megawatt hours and multiplies by the entered capture fraction. Zero point zero zero one percent is one hundred thousandth, giving about two hundred forty nine point six five four megawatt hours. Doubling that assumption to zero point zero zero two percent doubles the result. Bars share eight tenths of a pixel per megawatt hour. A zero capture yields zero usable energy while mathematical rest energy remains. No capture efficiency has been experimentally established by this page. At the saved usable energy assumption, dividing two hundred forty nine point six five four megawatt hours by one hundred megawatts gives about two point four nine seven hours. At two hundred megawatts the same energy lasts half as long, about one point two four eight hours. Bars share one hundred sixty pixels per hour. This energy-over-power quotient is dimensional accounting, not a manufacturing plan, reliability guarantee or provision of a bill of materials. The prediction controls compare a stated learning choice rather than verifying a real technology.