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Biology Calculators

Health, fitness, and life science calculators

Calculate your Body Mass Index

Estimate your daily calorie requirements based on age, weight, height, and activity level.

Calculate your ideal body weight based on height using the Devine formula.

Estimate body fat percentage using the US Navy method.

Calculate your maximum heart rate and training zones.

Calculate how much water you should drink daily based on weight.

Calculate estimated due date from last menstrual period (days from today).

Estimate blood alcohol content (BAC) based on drinks consumed.

Calculate optimal wake times based on 90-minute sleep cycles.

Calculate daily protein needs based on weight and activity level.