Ideal Weight Guide: Healthy Weight for Your Height

How ideal weight guide works in practice

Ideal weight is an estimated weight range associated with lower health risk for a given height and sex. Formulas use height in inches or centimetres to produce a target weight — not a mandatory goal for everyone.

The goal is not to memorize every term — it is to know which inputs matter and what outcome you are aiming for.

So what: When you can explain this in your own words, you are far less likely to accept a bad quote, fee, or assumption.

A real scenario worth running

Man, 178 cm (5 ft 10 in), medium frame. Step by step: Height 70 inches → Devine ideal = 50 + 2.3×(70−60) = 73 kg (161 lb) → BMI 18.5–24.9 range for 178 cm: ~59–79 kg. Bottom line: Healthy target roughly 68–77 kg — use range, not a single number.

So what: Plug your own numbers into the same logic before you decide.

What "ideal weight" actually means

Ideal body weight is an estimated healthy weight for your height and sex — a screening guide, not a mandatory target. Formulas like Devine, Robinson, and Miller produce a single number; BMI healthy ranges produce a band. Athletes, older adults, and people with large frames may legitimately fall outside "ideal" without health risk.

So what: Run your own inputs before you commit — small changes in assumptions can shift the outcome sharply.

Common ideal weight formulas

All use height; results are approximate:

Height is in inches in these formulas. Convert cm to inches: divide by 2.54.

So what: Run your own inputs before you commit — small changes in assumptions can shift the outcome sharply.

Frame size adjustment

Wrist circumference or elbow breadth estimates frame:

A 178 cm man with medium frame should think in ranges, not one exact kilogram.

So what: Run your own inputs before you commit — small changes in assumptions can shift the outcome sharply.

Worked example

Man, 178 cm (70 in), medium frame:

A rugby player at 85 kg with low body fat is not "unhealthy" despite exceeding Devine ideal — composition matters more than the number.

So what: Run your own inputs before you commit — small changes in assumptions can shift the outcome sharply.

Ideal weight vs BMI vs body fat

So what: Run your own inputs before you commit — small changes in assumptions can shift the outcome sharply.

Who should not rely on ideal weight alone

• Strength athletes — muscle increases weight without increasing fat-related risk
• Older adults — sarcopenia (muscle loss) can produce "ideal" weight with unhealthy fat levels
• Pregnant women — ideal weight categories do not apply
• Teens — use growth charts, not adult formulas

So what: Run your own inputs before you commit — small changes in assumptions can shift the outcome sharply.

Setting a realistic goal

1. Calculate your ideal weight range (formula ± frame adjustment and BMI band)
2. Compare to current weight — aim for 0.5–1% body weight loss per week if above range
3. Track waist measure alongside scale weight
4. Prioritize habits (protein, steps, sleep) over hitting one number

So what: Run your own inputs before you commit — small changes in assumptions can shift the outcome sharply.

Common mistakes

1. Devine formula: men 50 + 2.3×(height in − 60); women 45.5 + 2.3×(height in − 60) — this quietly costs you over time.
2. BMI healthy range 18.5–24.9 maps to a weight band for each height — this quietly costs you over time.
3. Frame size (small/medium/large) adjusts ideal weight ±10% — this quietly costs you over time.
4. Muscle mass can put athletes above 'ideal' without excess fat — this quietly costs you over time.

What to do next

Use our Ideal Weight Calculator to model your situation — change one input at a time to see what moves the result most.