Luminus

Health tools

Get the numbers behind a diet or training plan: daily calorie needs (TDEE and BMR), macro splits, BMI, body-fat estimates, ideal weight, one-rep-max, and hydration and protein targets. There are also running-pace, due-date, and ovulation tools for everyday planning. Each calculator uses established formulas and runs entirely in your browser.

27 free tools · no sign-up

Daily calories you burn, plus targets for cut, maintain, or bulk.

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Body Mass Index with the WHO category and your healthy weight range.

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Estimate your basal metabolic rate with Mifflin-St Jeor and Harris-Benedict.

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Split daily calories into protein, carb and fat grams by diet preset.

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Find maintenance calories and targets to lose, maintain or gain weight.

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Estimate body fat percentage with the US Navy tape method.

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Ideal body weight by Devine, Robinson, Miller and Hamwi formulas.

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Estimate your 1RM and build a percentage-of-max lifting table.

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Daily water target from body weight and activity, in liters and ounces.

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Recommended daily protein range by goal, plus per-meal targets.

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Pace, speed and race-time predictions from distance and time.

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Estimate pregnancy due date, current progress and conception from LMP.

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Predict ovulation, fertile window and upcoming period dates.

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Calculate optimal bedtime or wake-up times based on sleep cycles.

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Determine target training zones using age and resting heart rate.

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Estimate calories burned during activities using MET values.

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Calculate lean body mass, fat mass, and body fat percentage.

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Assess body fat distribution and cardiovascular health risk.

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Convert HbA1c to average blood glucose levels (eAG) and vice versa.

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Evaluate systolic and diastolic blood pressure values.

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Predict child adult height using parental height measurements.

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Estimate blood alcohol concentration (BAC) over time.

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Determine recommended weight gain targets by pregnancy week.

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Calculate macronutrient targets (carbs, protein, fat) for ketogenic diet.

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Calculate relative strength performance scores for powerlifting.

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Calculate the total financial cost of smoking over time.

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Interactive timer for intermittent fasting tracking.

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Why use these health tools?

  • TDEE, macros, and protein targets connect to each other, so you can move from maintenance calories to a real meal plan in one place.
  • Uses recognized equations (Mifflin–St Jeor for BMR, Epley for one-rep-max) rather than vague guesses.
  • Personal metrics like weight, body fat, and cycle dates stay on your device — nothing is stored or shared.

Frequently asked questions

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