Ideal weight calculator

“Ideal weight” formulas offer historical reference ranges from height and sex—not a personal destiny. This calculator shows common estimates such as Devine and Robinson so you can see a ballpark, then set goals that fit your body and lifestyle.

What ideal-weight formulas are trying to do

Classic formulas were developed for clinical dosing and population reference, not as a modern body-composition coach. They typically start from a base weight at a reference height and add pounds for each inch above that height, with different constants for men and women. Results are rough midpoints, not a required finish line for health or aesthetics.

Your best weight is the one you can maintain with strength, energy, regular periods if applicable, good labs when checked, and a life you enjoy. Two healthy adults of the same height can thrive at different weights depending on muscle mass and frame.

How to read Devine, Robinson, and similar estimates

If several formulas cluster in a range, treat that band as context, not a command. If you are already strong, athletic, and feel well above the estimate, you may simply carry more muscle than the formula assumes. If you are far above the range and also see a high waist circumference, focusing on sustainable fat-loss habits may help—without needing to hit the exact formula number.

FreeNutri's ideal weight calculator is free and requires no signup. Use it to frame a conversation with yourself about goals, then verify direction with BMI trends, waist measurements, and how training feels.

Setting a better personal target

Prefer outcome-based goals: walk upstairs without gasping, deadlift more than last month, fit a favorite jacket, improve blood pressure with clinician guidance, or maintain a weight for three months without white-knuckle restriction. Those targets beat chasing a 1970s equation.

If you want a number, choose a range. Maintain the bottom of the range with habits you like, then decide whether another phase is worth it. Aggressive goals that require misery usually produce regain. Moderate goals that teach meal structure and lifting tend to stick.

Muscle mass changes the meaning of “ideal”

Strength training can push a healthy weight above older formula predictions while improving metabolic health and function. In that case, body-fat estimates, photos, and performance are better scoreboards than forcing yourself lighter. Older adults especially benefit from protecting muscle even if that means a higher scale weight than a chart suggests.

During fat loss, high protein and lifting help you land at a lighter weight with more of your strength intact. That composition-aware finish line is often more satisfying than the lowest number on a formula printout.

When to de-emphasize the number

Pregnancy, adolescence, eating-disorder recovery, and certain medical conditions call for personalized clinical guidance—not online ideal-weight tools. If weight goals increase anxiety or rigid rules, step away from calculators and focus on flexible healthy behaviors with professional support.

For everyone else, check formulas occasionally, then spend your attention on groceries, steps, sleep, and progressive training. Those inputs change health whether or not you ever match an “ideal” to the pound.

Turn a formula range into a personal experiment

Pick a mid-range target from the calculator, then define success criteria beyond the scale: climbing stairs more easily, improving a lift, sleeping better, or fitting clothes more comfortably. Run an eight-to-twelve-week habit block aimed at that range with high protein, strength training, and a moderate calorie deficit if fat loss is the goal.

At the end of the block, review energy and maintainability. If you feel strong and the habits stick, you can hold or set a new range. If you reached a lower weight but feel exhausted and socially isolated from food rules, the formula “win” was not a lifestyle win— raise calories toward maintenance and rebuild a weight you can keep. Frame size, muscle, and personal history all widen the healthy band around any formula result. If two formulas disagree by several pounds, use the overlap as a soft range and evaluate progress with energy and performance first. Write down your chosen range and the habits that support it so the goal stays behavioral, not purely numerical. Revisit the range only after a full training block rather than after every fluctuating weigh-in.