What is degrees Plato?

Degrees Plato (°P) measures the percentage of dissolved extract (mostly sugars) by weight in wort. It was developed specifically for the brewing industry and is the standard unit used by professional brewers, particularly in Germany and many European countries.

Why do some brewers use Plato instead of SG?

Plato is the professional brewing standard in many countries. It directly represents the percentage of sugar by weight, making recipe calculations more intuitive. SG is more common among homebrewers, particularly in the UK and US.

How accurate is the conversion?

The polynomial formula used here is accurate to within 0.001 SG across the normal brewing range (0-30 °P). This is more than sufficient for homebrewing purposes.

What is the quick rule of thumb for Plato to SG?

A rough approximation is to divide Plato by 4 and add 1.000. For example, 12 °P is roughly 1 + (12/4)/100 = ~1.048. The polynomial formula used here is more precise, but the rule of thumb is handy for quick mental estimates.

What Plato range covers most beer styles?

Most beers fall between 8-20 °P (1.032-1.083 SG). Session beers: 8-10 °P. Standard ales and lagers: 11-14 °P. Strong ales: 15-20 °P. Barleywines and imperial stouts can exceed 22 °P.

BrewCalcs

Plato to SG Converter — Gravity Unit Conversion

Convert between degrees Plato and specific gravity for brewing calculations.

Conversion Direction

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Degrees Plato

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How We Calculate This

Conversion Formulas

Plato to SG: SG = 1 + (Plato / (258.6 - ((Plato / 258.2) x 227.1)))

SG to Plato: Plato = -616.868 + (1111.14 x SG) - (630.272 x SG²) + (135.997 x SG³)

Both formulas use established polynomial approximations that are standard in the brewing industry.

Frequently Asked Questions

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Last updated: 2025-02-20

All calculations are estimates. Always verify values and adjust based on your equipment and ingredients.