My Health Bestie
My Health Bestie
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Free health tools · no sign-up · nothing saved

Free health calculators, minus the jargon.

Cholesterol, blood sugar, heart rate, body and hydration. Punch in your numbers, get a straight answer, and see what it actually means for you, in plain English.

  • 14 calculators
  • Works on your phone
  • No account, no tracking
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LDL cholesterol

Work out your LDL from a standard lipid panel.

3 inputs Open

Heart rate zones

Find your five training zones from your age.

2 inputs Open

A1c to average blood sugar

Turn your A1c into an estimated average glucose.

1 input Open

Water intake

Your daily water target by weight and activity.

2 inputs Open

Heart & circulation

Cholesterol, ratios and training zones. 4

LDL cholesterol

Work out your LDL from a standard lipid panel.

3 inputs Open

Cholesterol ratio

Your total-to-HDL ratio, and what it signals.

2 inputs Open

Heart rate zones

Find your five training zones from your age.

2 inputs Open

Target heart rate

The ideal heart-rate range for your workout.

2 inputs Open

Blood sugar & metabolism

A1c, glucose units and metabolic age. 3

A1c to average blood sugar

Turn your A1c into an estimated average glucose.

1 input Open

Blood sugar converter

Switch between mg/dL and mmol/L in a tap.

1 input Open

Metabolic age

See how your metabolism compares to your age.

4 inputs Soon

Body & composition

Body fat, ratios, macros and protein. 5

Body fat percentage

Estimate body fat with the US Navy method.

3 inputs Open

Waist-to-hip ratio

A 10-second marker of heart-health risk.

2 inputs Open

Body shape

Find your body shape from three measurements.

3 inputs Open

Macro calculator

Daily protein, carbs and fat for your goal.

5 inputs Open

Protein intake

How much protein your body needs each day.

3 inputs Open

Kidney & hydration

Filtration rate and daily water target. 2

eGFR kidney function

Estimate kidney filtration from your creatinine.

3 inputs Open

Water intake

Your daily water target by weight and activity.

2 inputs Open

From the blog

Latest health guides

Browse all guides
A lipid panel report showing cholesterol values beside mg/dL and mmol/L unit labels
Wellness

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
Tape measure around the waist with neck and height markings showing Navy method inputs
Wellness

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
A blood glucose meter reading shown with mg/dL and mmol/L unit labels side by side
Wellness

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
A balanced meal, walking shoes, glucose meter, and A1C laboratory report arranged as a safe improvement plan
Wellness

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
A water bottle, glass, hydrating foods, and exercise towel arranged as a flexible daily hydration plan
Nutrition

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
A balanced plate divided among protein, high-fiber carbohydrates, vegetables, and healthy fats beside a practical macro plan
Nutrition

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-rich foods, a scoop, and strength-training equipment arranged around a practical daily intake plan
Nutrition

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
An exercise heart-rate trace falling during the first two minutes of recovery beside a stopwatch
Movement

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
Five colored exercise intensity bands arranged around a heart-rate trace for different ages
Movement

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