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Rough Puff Pastry Calculator

Calculate ingredient quantities for rough puff pastry based on total weight needed.

How We Calculate This

This calculator uses the standard rough puff ratio of equal parts flour and butter by weight, with half as much cold water — a flour:butter:water ratio of 1:1:0.5 (2.5 total parts). Enter your target weight and the flour, butter and water are scaled so they add up to exactly that weight. For example, 500 g splits into 200 g flour, 200 g butter and 100 ml water.

Salt and lemon juice are small trace additions stirred in on top of that split — salt at 1% of the flour weight (standard for pastry) and a little acid at 2% of the flour weight. The lemon juice (or white wine vinegar) is optional but recommended: it relaxes the gluten and makes the dough easier to roll without shrinking.

Frequently Asked Questions

Last updated: February 2026

All calculations are based on standard ratios and conversions. Results may vary with specific ingredients, equipment, and conditions.