Skip to main content
KX Toolkit
Sign in Get started
Text Analysis Tools 29 tools
Keyword Tools 14 tools
Backlink Tools 12 tools
Website Management Tools 20 tools
Meta Tag Tools 4 tools
Image Tools 25 tools
Password & Encryption 17 tools
Unit Converter Tools 24 tools
Website Tracking 7 tools
Domain Tools 5 tools
Calculators 14 tools
Developer Tools 33 tools
CSS Tools 14 tools
Color Tools 13 tools
Social Media Tools 17 tools
PDF Tools 10 tools
Productivity Tools 6 tools
Audio Tools 5 tools
Video Tools 3 tools
Bulk Tools 35 tools
View all tools on one page View all categories

Ideal Weight Calculator

Devine (1974), Hamwi (1964), Robinson (1983), and Miller (1983) are four widely cited formulas, each developed for a different purpose. Devine and Hamwi were originally created for medication dosing, not health goals. Robinson and Miller were refined later from larger population

Calculators

Devine (1974), Hamwi (1964), Robinson (1983), and Miller (1983) are four widely cited formulas, each developed for a different purpose. Devine and Hamwi were originally created for medication dosing, not health goals. Robinson and Miller were refined later from larger population

This free Ideal Weight Calculator from KX Toolkit is part of our all-in-one online toolkit. It runs entirely in your browser, so your data never leaves your device for client-side operations. 100% free, forever - no paywall, no credit card, no trial.

How to use the Ideal Weight Calculator

  1. Enter your inputs (date, amount, rate, etc.).
  2. Pick any optional settings (tax mode, country, unit).
  3. Read the result - most calculators update as you type.
  4. Copy the result, or screenshot the breakdown for your records.

What you can do with the Ideal Weight Calculator

  • Quick personal-finance maths before a major purchase.
  • Tax estimates for freelancers and small businesses.
  • Verify a number on an invoice or receipt.
  • Help kids with homework calculations.

Why use KX Toolkit's Ideal Weight Calculator

  • Browser-based: Works on Windows, macOS, Linux, iOS and Android - no install, no extension.
  • Privacy-first: Client-side tools never upload your data; server-side tools delete files right after processing.
  • Mobile-friendly: Full feature parity on phones and tablets - not a stripped-down view.
  • Fast: Optimised for instant feedback. No artificial waiting screens, no email-gated downloads.
  • One hub for everything: 300+ tools across SEO, text, image, PDF, code, color, calculators and more - skip switching between sites.

Tips for the best results

For currency-aware calculators (GST, tax), always confirm the rate matches the jurisdiction on your invoice - rates change yearly.

Related Calculators

If you find this tool useful, explore the full Calculators collection or browse our complete tool directory. KX Toolkit is built for marketers, developers, designers, students and anyone who needs a quick utility without signing up for yet another SaaS.

Why does this calculator show four different ideal weights?
Devine (1974), Hamwi (1964), Robinson (1983), and Miller (1983) are four widely cited formulas, each developed for a different purpose. Devine and Hamwi were originally created for medication dosing, not health goals. Robinson and Miller were refined later from larger population data. The four results usually fall within a few kilograms of each other, giving you a reasonable range rather than a single fixed number.
Which ideal weight formula should I trust most?
No single formula is universally best. Robinson and Miller tend to be more representative of modern populations than Devine or Hamwi. For most adults, the average of all four is a sensible starting estimate. If you want a more individualized target, BMI range, body fat percentage, and waist-to-hip ratio together give a fuller picture than any ideal weight formula on its own.
Is ideal weight the same as healthy weight?
Not exactly. Ideal body weight formulas were designed for medical purposes like drug dosing, not as health prescriptions. A healthy weight is a range, often expressed as BMI 18.5 to 24.9, and depends on muscle mass, body composition, and personal medical history. You can be healthy somewhat above or below your calculated ideal weight, especially if you are muscular or naturally small-framed.
Do these formulas work for very short or very tall people?
They become less reliable at the extremes. Devine and Hamwi were built around heights between 152 and 183 cm and can give odd results outside that range. Modern formulas like Robinson and Miller handle extremes a little better but still have limitations. If you are under 5 feet or over 6 foot 4, treat the result as approximate and rely more on body composition measurements.
Should I aim for the lowest of the four numbers?
No. Aiming for the lowest formula result can push you toward underweight, especially if you are athletic. The four numbers form a healthy range. Pick a target near the middle, consider how you feel and perform at different weights, and consult a doctor or dietitian before pursuing a weight that is significantly different from where you are now.
How do these formulas handle muscle mass?
They do not. Every formula here uses only height (and Hamwi adjusts slightly for frame size). Two people the same height get the same ideal weight regardless of muscle. This is the biggest limitation: a muscular athlete will often weigh more than the calculated ideal yet have lower body fat than someone at the formula weight. Combine ideal weight with body fat percentage for a meaningful target.

No reviews yet

Be the first to share your experience with the Ideal Weight Calculator.

Calculators
View all

Age Calculator

Calculate exact age in years, months, and days from a date of birth.

Hours Calculator

Calculate the hours and minutes between two times.

Twitter Ad Revenue Calculator

Estimate your potential Twitter/X ad revenue from impressions.

Tip Calculator

Calculate restaurant tips and split the bill between people instantly.

EMI / Loan Calculator

Calculate monthly EMI, total interest and full amortization for any loan.

Compound Interest Calculator

Project savings growth with compounding, regular contributions and a year-by-yea...