Health Calculators

Check common health estimates such as BMI, ideal weight, body fat, hydration, heart rate, pregnancy dates, and ovulation timing.

Browse 14 tools curated in this category. Start with what you need, or jump straight to a specific calculator below.

BMI calculatorideal weight calculatorbody fat calculatorpregnancy due date calculatorovulation calculatorhydration calculator

Free BMI calculator using height and weight with US and metric-friendly inputs. Instantly estimate body mass index for general health screening.

Use this body fat calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this ideal weight calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this water intake calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Free pregnancy due date calculator based on last menstrual period. Estimate expected due date and pregnancy timeline using a simple standard method.

Use this ovulation calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this heart rate calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this body surface area calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this waist to hip ratio calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this lean body mass calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Estimate daily water intake using body weight and a hydration multiplier.

Estimate body surface area using height and weight.

Calculate BMI Prime by dividing BMI by the healthy upper-range threshold of 25.

Calculate waist-to-height ratio using waist and height in the same unit.

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