#widmark

Blood-alcohol estimation as an API, using the Widmark equation, computed locally and deterministically. The estimate endpoint works out the peak and current blood-alcohol concentration — in both per mille (‰) and percent (%) — from the alcohol consumed, body weight, sex and the time elapsed since drinking, and tells you roughly how long until you are sober or back under a chosen legal limit. Alcohol can be given as grams, as US standard drinks, or as a drink volume and ABV. The drink endpoint is a standard-drink calculator: from a volume and ABV it returns the grams of pure alcohol, US standard drinks (14 g), UK units (10 ml) and EU standard drinks (10 g). The sober endpoint estimates the time for a current BAC to fall to zero or to a target limit at a chosen elimination rate. Everything is computed locally and deterministically, so it is instant and private. IMPORTANT: this is a rough estimate for educational use only — real blood-alcohol depends on many personal and situational factors. Never use it to decide whether it is safe or legal to drive; when in doubt, do not drive. Ideal for educational and harm-reduction tools, hospitality and event apps, and personal drink trackers. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is blood-alcohol maths; for the calories or nutrition of drinks use a food or nutrition API.

api.oanor.com/bac-api