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Free Calculators and Charts for U.S. Patients

Calculators and charts for planning treatment abroad: BMI for weight-loss surgery, expected weight loss, hair grafts and tooth numbers.

Bariatric

BMI Calculator for Weight-Loss Surgery

Under ASMBS/IFSO 2022, surgery is recommended at BMI 35 or more, and considered at 30 to 34.9 in some cases. NIH's page uses 40, or 35 with a health problem.

Weight Loss After Surgery Calculator

In randomized trials, sleeve patients lost about 49% of excess weight at 6 months and 72% at 1 to 2 years. For bypass, about 53% and 77%.

Hair Restoration

Hair Graft Calculator: Grafts by Norwood Stage

There's no official chart. Clinic figures run from 500 to 1,000 grafts at Norwood 2 to 5,000 or more at Norwood 7. Sources disagree, so we show ranges.

Dentistry

Tooth Number Chart: Universal Numbering System

U.S. dentists number adult teeth 1 to 32, from upper right to upper left, then lower left to lower right. Baby teeth are lettered A to T.