How many stone blocks are in the Great Pyramid of Giza?

How to get close to this number

Divide volume by block size. The pyramid is roughly two and a half million cubic metres of stone, and a typical block is around a cubic metre. Total volume divided by block volume gives the count directly, and this is the standard route for any "how many units make up this structure" question.

The rate calculation in the explanation is what conveys the achievement: one block placed roughly every two minutes, without pause, for twenty years. That is not a construction schedule, it is an industrial process — and it implies quarrying, transport, ramping and placement all running continuously in parallel.

The labour organisation is the part that follows from the arithmetic. A rate like that cannot be achieved by forced labour in the popular imagination's sense; it requires a permanent skilled workforce with supply chains, housing and food distribution, which is exactly what excavations of the workers' settlements have found. The number constrains the explanation.