Ideal Weight Calculator

What this calculator does

This ideal weight calculator is built for the moment you need a defensible number — quoting a client, comparing options, or checking someone else's math — not a generic estimate.

The Devine formula estimates ideal body weight from height.

Runs entirely in your browser — no data leaves your device.

Purpose-built for a specific decision — not a generic template.

Formula and worked example are shown in plain language below.

Includes a copy-ready summary and printable PDF view.

How to use the Ideal Weight Calculator

Enter your values in the fields on the left.
Results update automatically.
Use the action buttons to copy, share or print.

The formula

Male: 50 + 2.3 kg per inch over 5 ft. Female: 45.5 + 2.3 kg per inch over 5 ft.

Worked example

170 cm male ≈ 66 kg.

Common mistakes

Ignoring frame size
Not adjusting for muscle
One-size-fits-all thinking

When to use it

Use as a rough clinical guideline.

Pro tips for the Ideal Weight Calculator

Round-trip check: reverse the inputs to confirm the formula matches what you'd compute by hand.
Bookmark this page: the URL and inputs are all you need to reproduce the exact result later.
Save your favorite scenarios by clicking the star icon — they're stored locally, no account needed.

Frequently asked questions

›Accurate?

Rough — many people are healthy outside range.

›Best formula?

Robinson, Miller, Hamwi are alternatives.

›Frame size?

Wrist circumference gives clue.

›For medication dosing?

Devine is used clinically.

›Athletes?

Often over ideal weight due to muscle.

›Is the Ideal Weight Calculator free to use?

Yes. Every calculator on CalcPilot, including the Ideal Weight Calculator, is free with no sign-up, no watermark, and no export limit.

›Can I embed the Ideal Weight Calculator on my site?

Embedding isn't public yet, but you can link directly to this page — the URL is stable and shareable.

Embed this calculator

Drop the Ideal Weight Calculator into your own site or blog post. Free to use — a small “Powered by CalcPilot” link is appreciated.

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