The Devine formula was originally written in 1974 to help clinicians dose medication by body weight, and it stuck around as a rough reference point for a 'typical' healthy weight at a given height. It's a single data point, not a target to chase.
Treat this as one data point — frame, muscle mass, and personal history all matter too.
Treat this as a rough anchor point for a conversation with a trainer or doctor, or as one input among several when setting a long-term weight goal — not a number to chase exactly. It's most useful early on, before you've decided on a more personalized target based on your own body composition and goals.
The Devine formula gives 50kg for men and 45.5kg for women at 5 feet (152cm) tall, then adds 2.3kg for every inch above that. It was designed for drug-dosing calculations rather than as a fitness target, so it's best read as a rough reference rather than a personal goal.
Health Calc