Beer ABV (OG/FG)
Calculate Beer ABV (OG/FG) instantly with the exact formula and a worked example.
Beer ABV (OG/FG)
Original gravity (OG)
Final gravity (FG)
Alcohol by volume
5.25% ABV
Refined formula
5.34% ABV
Apparent attenuation
80%
More about: Beer ABV (OG/FG)
What it calculates
The “Beer ABV (OG/FG)” calculator computes Alcohol by volume in % ABV from 2 parameters: original gravity (og), final gravity (fg).
A handy everyday calculator for daily tasks.
Example calculation
With parameters Original gravity (OG) = 1.05, Final gravity (FG) = 1.01 the result is 5.25 % ABV (ABV = (OG − FG) × 131.25).
How to use
- Enter original gravity (og) and final gravity (fg) — each field above is adjustable with a slider.
- Alcohol by volume (% ABV) is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is Beer ABV (OG/FG) calculated?
The Beer ABV (OG/FG) calculator computes Alcohol by volume (in % ABV) from original gravity (og), final gravity (fg). Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Beer ABV (OG/FG) calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.
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