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Tools
Free interactive calculators and explainers you can use right here in your browser. For printable lists and references, see the Free Resources.
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Calculator
Protein intake calculator
Estimate your daily protein target in grams, based on your body weight and goal: minimum intake, general health, muscle building, or fat loss with muscle retention.
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Calculator
Vitamin D calculator
Estimate the daily vitamin D supplement dose that may help you reach a desired blood level, based on your weight, current intake, and current serum level. For educational information only.
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Calculator
Fertility window calculator
Estimate your fertile window and likely ovulation day from your last period and average cycle length, plus the two most fertile days. For educational information only.
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Calculator
Daily water intake calculator
Estimate how much water to drink each day, in ounces, cups, and litres, based on your body weight, weekly activity level, climate, and life stage. For adults 18 and over.
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