Pregnancy Weight Gain Calculator: BMI, Current Gain and Range
Calculate prepregnancy BMI, current weight gain, the CDC total gain range and the corresponding end-of-pregnancy weight range for one baby or twins.
Debt-to-Income Calculator: Front-End, Back-End and Payment
Calculate housing and total debt-to-income ratios from gross income and required monthly payments, then test a proposed payment against an editable target.
Body Surface Area Calculator: Mosteller, Du Bois and Haycock
Calculate body surface area from height and weight with the Mosteller, Du Bois and Haycock formulas, metric or US units, and a clear method comparison.
VO2 Max Calculator: Cooper, Rockport and Heart Rate
Estimate VO2 max with the Cooper 12-minute run, Rockport one-mile walk, measured heart-rate ratio, or absolute and relative oxygen conversion.
Heart Rate Zone Calculator: Max HR, HRR and BPM
Calculate five heart rate training zones from age or measured maximum heart rate using percentage-of-max or heart rate reserve methods.