Nazi crematoria: flawed calculation misrepresents Holocaust technology

Could Nancy ovens burn more bodies than today's?

How does a current civil crematorium compare to 1940s industrial ovens? A quick answer is misleading. A circulating calculation takes the 520 ovens in service in Spain in 2021—a year saturated by ELbichito—and cross-references them with the 40 attributed to Auschwitz-Birkenau, concluding that WWII-era technology was "10 to 50 times more efficient." The figure sounds definitive and fuels various theories. The uncomfortable detail is that it compares incomparable equipment and overlooks their respective purposes.

The starting point: 520 ovens in Spain versus 40 at Auschwitz

The numbers behind this are clear. In 2021, approximately 420,000 people died in Spain, but only half were cremated, distributed among hundreds of ovens that worked near saturation during the pandemic; more have been purchased since. On the other side, the calculation uses the minimum victim count for Auschwitz-Birkenau from 1942-1944—1,300,000 deaths—with an estimated maximum of three million, and about forty ovens.

It is necessary to separate two things: incineration capacity and death toll. The former depends on how many bodies fit per oven, daily operating hours, and durability before breakdown. The latter depends on many variables unrelated to any oven.

Why an industrial crematorium isn't equivalent to a civil one

Here lies the technical core. A civil oven processes one body at a time and returns individual ashes to each family; a crematorium designed to dispose of corpses on a mass scale did not have such constraints. Without the need to identify remains, multiple bodies could be placed per muffle, saving coffins, time, and fuel. The difference was not high-tech, but methodological and administrative lack of scruples.

A second factor often overlooked is operating hours. A Spanish municipal crematorium does not run overnight; an industrial one could operate for much of the day. This multiplies capacity without requiring futuristic machinery.

The counterargument is equally stubborn: no oven works uninterrupted without breakdowns, and maintenance limits production most severely. The multiplier factor narrows accordingly.

The calculation that reduced the factor from 50 to 8

It is worth doing the math. If you take the 420,000 cremated in Spain across 520 ovens in one year, you get about 807 per oven. If you take the 410,000 at Auschwitz across 40 ovens over three years, you get close to 3,416. The ratio is 4.2 times. When correcting for the fact that only half of Spain's deceased were cremated, the factor rises to eight. Eight times more, not fifty.

From this emerged one of the discussion's tension peaks: whether Auschwitz data is annual or covers the full three-year period changes the result completely. Itemized breakdowns, with annual averages and temporal distribution, are where the multiplier collapses.

Where arithmetic becomes something else

So far, this is a disagreement on dividing two figures. The problem arises when comparing ovens serves as a springboard to question the extermination itself. Arguments appear regarding supposedly unsealed chambers, door orientations, or documentary remnants, presented as cracks in the narrative.

The most recurrent piece is the International Red Cross Report, often cited out of context. That report acknowledges the extermination and clarifies that delegates could not inspect Jewish camps; quotes attributed to it for denial correspond to sections on other internments. Something similar occurs with reconstructed plans of Majdanek or Anne Frank's death from typhus: real data that do not prove what is claimed, clashing with manufacturer documentation, testimonies, and confessions.

That a calculation is poorly done does not make its opposite true. This logical leap recurs repeatedly.

Questions left unresolved

The issue leaves several loose ends. Why were bodies cremated instead of buried, despite the energy cost, when mass graves were cheaper? Why has the victim count been revised downward in history books while other figures remain untouchable? And the underlying question: which part of war accounting is firm data and which is later reconstruction, mixing twenty different camps in the same sentence?

With this raw material, any conclusion guarantees controversy. The only thing that withstands scrutiny is performing the division correctly. Everything else is for those with the patience to recount it all again.