Cholesterol mg/dL to mmol/L: how to convert your lipid units
Convert cholesterol with divide by 38.67 and triglycerides with divide by 88.57, see a worked LDL example, and avoid the glucose divide-by-18 trap.
Sheenam Midha 6 min read
Health articles and guides
Browse our latest evidence-informed health articles, practical guides, and calculator explainers.
Navy body fat formula: how the tape method estimates body fat
Learn which tape measurements the US Navy body fat formula uses, how to take them, and why the result is an estimate rather than a scan.
Sheenam Midha 7 min read
mg/dL to mmol/L: how to convert a blood sugar reading
Convert a single blood glucose reading between mg/dL and mmol/L with the divide-by-18 rule, a worked example, and common readings in both units.
Sheenam Midha 6 min read
How to lower A1C safely: what changes the number and when
Learn how food, activity, medication, sleep, and testing conditions affect A1C, plus what a realistic improvement timeline looks like.
Sheenam Midha 10 min read
How much water should I drink? A practical daily guide
Estimate daily fluid needs from body size and context, then adjust for heat, exercise, food, pregnancy, illness, and medical restrictions.
Sheenam Midha 11 min read
Macros for weight loss: how to set protein, carbs, and fat
Build a realistic macro target for weight loss without mistaking calculator precision for certainty or eliminating an entire food group.
Sheenam Midha 11 min read
Protein intake for muscle gain: a practical grams-per-day guide
Estimate a useful daily protein range for building muscle, then turn the number into meals without treating more protein as automatically better.
Sheenam Midha 11 min read
Heart rate recovery chart: what your 1- and 2-minute drop means
Measure heart rate recovery consistently, compare one- and two-minute drops, and understand why protocol and symptoms matter more than one cutoff.
Sheenam Midha 10 min read
Heart rate zones by age: a complete training chart
Five heart-rate zones by age, two ways to estimate maximum heart rate, where Zone 2 sits, and why the fat-burning zone is not a shortcut to fat loss.
Sheenam Midha 12 min read
Body fat percentage chart for men and women, by age
Body-fat categories for men and women, reference bands by age, and why the measuring method can matter as much as the category you land in.
Sheenam Midha 11 min read
Waist-to-hip ratio chart: how to measure and read your result
Measure waist and hips consistently, calculate the ratio, and understand sex-specific risk bands and their limitations.
Sheenam Midha 9 min read
eGFR levels by age: a chart with important caveats
See population-average eGFR levels by age and learn why kidney disease cannot be diagnosed from age or one creatinine-based estimate alone.
Sheenam Midha 11 min read
Normal A1C by age: do targets change for older adults?
Diagnostic A1C thresholds stay consistent in adulthood, but safe treatment goals may change with health, medicines, and hypoglycemia risk.
Sheenam Midha 9 min read
Blood sugar chart by age: fasting and after-meal ranges
A clear blood sugar chart that separates diagnostic cutoffs from common diabetes treatment targets and explains when age changes the plan.
Sheenam Midha 10 min read
Triglyceride-to-HDL ratio: formula, ranges, and limits
Calculate the triglyceride-to-HDL ratio, understand what a higher result may suggest, and learn why it cannot replace the full lipid panel.
Sheenam Midha 9 min read
Non-HDL cholesterol calculation: formula and target ranges
Learn the non-HDL cholesterol formula, see worked examples, and understand why this simple value can add context when triglycerides are elevated.
Sheenam Midha 9 min read
Cholesterol ratio chart: total/HDL, LDL/HDL, and TG/HDL
Compare the three cholesterol ratios, learn each formula, and understand why lower is not the only thing that matters.
Sheenam Midha 9 min read
A1C to blood glucose conversion: chart, formula, and examples
Convert A1C to estimated average glucose in mg/dL or mmol/L and learn why the estimate may differ from meter and CGM readings.
Sheenam Midha 9 min read
Friedewald formula: how calculated LDL cholesterol works
The Friedewald LDL formula in mg/dL and mmol/L, how VLDL is estimated from triglycerides, how the Sampson equation and direct LDL differ, and when the estimate stops being reliable.
Sheenam Midha 11 min read
Foods and cancer risk: 10 evidence-based choices for your plate
No food cures cancer, but your overall eating pattern can influence long-term risk. Here are 10 practical, evidence-based choices and the claims to ignore.
Sheenam Midha 8 min read