ABV Calculator from Original and Final Gravity

Choose this endpoint when you need to compute ABV from hydrometer or refractometer gravity readings for fermented beverages (beer, wine, cider). It is uniquely useful because it returns both simple and advanced formula results alongside apparent attenuation, making it suitable for homebrewers who want to cross-check methods. Prefer this over generic unit converters or nutrition databases when your input is raw specific gravity numbers from fermentation.

• Final gravity above original gravity returns an error or invalid result
• Gravity values outside the accepted range (OG 1.000–1.200, FG 0.980–1.200) may be rejected
• Missing required query parameters originalGravity or finalGravity returns a 400-level error
• Non-numeric gravity values cause a validation failure
• Extremely high gravity readings typical of mead or liqueur may fall outside expected range