Calculators
Health & Body
Handle body metrics and related calculators
This hub groups one family of calculation tasks together. Start with the most direct calculator, then move across the supporting tools in the same task cluster.
Top Tools
Start with the most common entry points.
⚖️🔥💪👁️
BMI Calculator
Calculate adult BMI from height and weight using the standard formula and view the public reference category. For general information only; not medical advice or a diagnosis.
BMR Calculator
Estimate adult basal metabolic rate (BMR) from age, formula sex, height, and weight using the Mifflin-St Jeor formula. For general information only; not medical or nutrition advice.
Body Fat Calculator
Estimate adult body-fat percentage using Deurenberg BMI-based and U.S. Navy (Hodgdon-Beckett) formulas with metric and imperial inputs. Returns ACE category, fat mass, lean mass, FFMI, and a Jackson-Pollock ideal body-fat reference. For general information only; not medical advice.
Color Vision Self-Test
Ishihara-style online self-test: 24 programmatically generated pseudoisochromatic plates automatically classify red / green / blue channel anomaly patterns and severity. Quick (10 plates) and standard (24 plates) modes; mobile-optimized; bilingual. Browser-local, no login, default no ad scripts, default no third-party analytics — results are not uploaded by the tool. For reference and self-understanding only; not a medical diagnosis. Consult an eye-care professional if you have concerns.
Common Tasks
Decide which tool to open first.
All Tools
All tools in this hub.
⚖️🔥💪👁️🗓️📆⚡
BMI Calculator
Calculate adult BMI from height and weight using the standard formula and view the public reference category. For general information only; not medical advice or a diagnosis.
BMR Calculator
Estimate adult basal metabolic rate (BMR) from age, formula sex, height, and weight using the Mifflin-St Jeor formula. For general information only; not medical or nutrition advice.
Body Fat Calculator
Estimate adult body-fat percentage using Deurenberg BMI-based and U.S. Navy (Hodgdon-Beckett) formulas with metric and imperial inputs. Returns ACE category, fat mass, lean mass, FFMI, and a Jackson-Pollock ideal body-fat reference. For general information only; not medical advice.
Color Vision Self-Test
Ishihara-style online self-test: 24 programmatically generated pseudoisochromatic plates automatically classify red / green / blue channel anomaly patterns and severity. Quick (10 plates) and standard (24 plates) modes; mobile-optimized; bilingual. Browser-local, no login, default no ad scripts, default no third-party analytics — results are not uploaded by the tool. For reference and self-understanding only; not a medical diagnosis. Consult an eye-care professional if you have concerns.
Due Date Calculator
Calculate due dates from start date and offsets for business-day or calendar-day scenarios.
Ovulation Calculator
Estimate your ovulation date and fertile window from the first day of your last period and your average cycle length. For general information only; not medical advice, a diagnosis, or birth control.
TDEE Calculator
Estimate adult TDEE from age, formula sex, height, weight, and activity level using the Mifflin-St Jeor formula and fixed activity multipliers. For general information only; not medical, nutrition, or training advice.
Related Hubs
Nearby task clusters.