Ideal Body Weight (IBW) Calculator
Calculate your Ideal Body Weight (IBW) using the three most widely cited clinical formulas: Robinson (1983), Devine (1974), and Miller (1983). Enter height in centimetres and select sex for instant results in kilograms. Used in medication dosing, anaesthesia, and nutrition planning.
Key Capabilities
What is Ideal Body Weight used for in medicine?
IBW is used clinically for weight-based drug dosing (especially antibiotics and anaesthetic agents), ventilator tidal volume calculations, and nutritional assessments. Drugs with poor fat solubility are dosed to IBW rather than actual body weight to avoid toxic accumulation.
Which IBW formula is most commonly used?
The Devine formula (1974) is the most widely cited in clinical practice, particularly for drug dosing and ventilator management. The Robinson formula (1983) is considered slightly more accurate for general population estimates. All three formulas are included so you can compare results.
How is IBW different from BMI healthy weight?
BMI healthy weight gives a range (18.5–24.9) depending on individual height. IBW formulas give a single target weight based solely on height and sex, originally derived from life insurance actuarial data. Neither is a definitive optimal weight — actual healthy weight varies by frame size and muscle mass.
How to Use
Upload your medical document
Open the Ideal Body Weight Calculator tool and upload your medical document (prescription, lab report, or medical record). Your data stays in your browser — zero server uploads.
AI analysis begins
The tool analyzes your document using specialized medical OCR models trained on healthcare documents. This typically takes 3-8 seconds.
Review extracted information
Review the structured medical information extracted from your document. Copy results or download for your records.
Frequently Asked Questions
What is Ideal Body Weight used for in medicine?
IBW is used clinically for weight-based drug dosing (especially antibiotics and anaesthetic agents), ventilator tidal volume calculations, and nutritional assessments. Drugs with poor fat solubility are dosed to IBW rather than actual body weight to avoid toxic accumulation.
Which IBW formula is most commonly used?
The Devine formula (1974) is the most widely cited in clinical practice, particularly for drug dosing and ventilator management. The Robinson formula (1983) is considered slightly more accurate for general population estimates. All three formulas are included so you can compare results.
How is IBW different from BMI healthy weight?
BMI healthy weight gives a range (18.5–24.9) depending on individual height. IBW formulas give a single target weight based solely on height and sex, originally derived from life insurance actuarial data. Neither is a definitive optimal weight — actual healthy weight varies by frame size and muscle mass.
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