What is the minimum amount of flour for hafrashas challah, with or without a brachah?

What is the minimum amount of flour that requires hafrashas challah? And what’s the minimum amount for hafrashas challah with a brachah?

What are the minimum flour quantities for hafrashas challah with and without a brachah?

The minimum amount of flour for hafrashas challah without a brachah is 1.200 kg (2.645 lbs), though some opinions state 1.250 kg (2.755 lbs). For hafrashas challah with a brachah, the minimum is 1.666 kg (3.673 lbs) according to Rav Chaim Naeh, or 2.250 kg (4.960 lbs) or more according to the Chazon Ish.

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