Health & fitness
Blood pressure ranges, BMI, heart-rate zones, hat and glove sizes.
- Blood pressure ranges (AHA chart) AHA blood pressure categories with systolic and diastolic ranges — normal, elevated, stage 1 and 2 hypertension and hypertensive crisis, explained.
- Blood sugar (glucose) ranges Blood glucose thresholds for normal, prediabetes and diabetes (fasting and 2-hour) in mg/dL and mmol/L, plus HbA1c % to mmol/mol.
- BMI chart: healthy weight by height BMI healthy-weight ranges for every height from 150 to 195 cm, with the full BMI category table (18.5–24.9 is healthy) and what BMI misses.
- Body fat percentage chart Body-fat percentage categories for men and women — essential, athlete, fitness, average and obese — across adult age groups.
- Body fat percentage categories by sex Body-fat ranges for men and women: essential, athlete, fitness, average and obese categories, age effects, and the most accurate measurement methods.
- Cholesterol level ranges Desirable, borderline and high ranges for total cholesterol, LDL, HDL and triglycerides in mg/dL and mmol/L, with common clinical ratios.
- Glove size conversion chart Convert glove sizes by hand circumference and length across US letter, EU and UK sizes — measure palm and finger length to fit.
- Hat size conversion chart Convert head circumference to US hat sizes and letter fits (S–XXL) — measure above the ears before ordering caps and hats.
- Heart rate training zones Five heart-rate training zones as % of max HR, with the 220-minus-age formula, resting-rate benchmarks and which zone to use.
- Sleep needs by age (hours) Recommended sleep hours by age from newborns to 65+, using the National Sleep Foundation ranges — 14–17 hours for babies down to 7–8 for older adults.
- Sleep recommendations by age Hours of sleep by age from newborns to adults 65+, following American Academy of Sleep Medicine and National Sleep Foundation guidance.
- Daily vitamin and mineral intake for adults RDA and AI daily reference intakes for adults: vitamins A, C, D, E, K, B6, B12 and folate, plus calcium, iron, zinc and magnesium, in mg, µg and IU.