Every calculator on Drxty is built from a published, citable formula or guideline — never invented data — and lives inside the article that explains the reasoning behind it. This page collects all of them in one place so you can jump straight to the tool you need.
Nutrition & Diet
NUTRITIONTDEE CalculatorYour total daily calorie burn based on activity level (Mifflin-St Jeor).
NUTRITIONProtein Intake CalculatorDaily protein target in grams based on your specific goal (ISSN ranges).
NUTRITIONStandard Drink CalculatorHow many standard alcohol units are actually in your drink (NIAAA).
NUTRITIONMacro CalculatorDaily protein, carbs, and fat targets based on your goals (Mifflin-St Jeor).
NUTRITIONAdded Sugar ConverterConvert grams of added sugar to teaspoons and see it against the daily limit.
NUTRITIONMagnesium RDA CalculatorYour recommended daily magnesium intake by age and sex (NIH ODS).
NUTRITIONCreatine Dosing CalculatorLoading and maintenance doses scaled to your body weight (ISSN).
NUTRITIONCholesterol Ratio CalculatorYour total cholesterol to HDL ratio and what it generally indicates.
NUTRITIONHydration CalculatorDaily water target based on your body weight, activity, and climate.
Fitness & Exercise
FITNESSRace Time PredictorPredict your 5K, 10K, half, or marathon time from a recent race (Riegel formula).
FITNESSBody Fat % CalculatorTape-measure body fat estimate using the US Navy circumference method.
FITNESSSweat Rate CalculatorHow much fluid you lose during exercise, and how much to rehydrate.
FITNESSPush-Up Test CheckerHow your push-up count compares to norms for your age and sex (ACSM).
FITNESSProgressive Overload CalculatorYour next training weight based on last session’s performance.
FITNESSRPE / RIR SliderSee what each RPE level means in reps-in-reserve terms.
FITNESSCardio vs. Strength Priority ToolA suggested training split based on your specific goal.
FITNESSHeart Rate Training ZonesYour 5 personalized training zones using the Karvonen formula.
FITNESSRest Day RecommenderHow many full rest days you likely need based on your training.
Health & Medical
HEALTHBMI CalculatorYour Body Mass Index, plus its real limitations as a health screen.
HEALTHResting Heart Rate CheckerSee where your resting heart rate falls relative to the typical adult range.
HEALTHIdeal Body Weight CalculatorThe clinical Devine formula, and why it is not a personal weight target.
HEALTHWaist-to-Hip Ratio CalculatorWhat your fat distribution pattern reveals that BMI alone misses (WHO).
HEALTHWaist-to-Height Ratio CalculatorThe keep-your-waist-under-half-your-height rule, explained.
HEALTHA1C to Average Glucose ConverterTurn your A1C percentage into an estimated average glucose reading (ADAG).
HEALTHGlucose Unit ConverterConvert blood glucose between mg/dL (US) and mmol/L (international).
HEALTHFever Temperature CheckerConvert F/C and see general adult fever reference ranges.
HEALTHPregnancy Due Date CalculatorEstimate your due date from your last period using Naegele Rule.
HEALTHOvulation & Fertile Window EstimatorEstimate your fertile window using the standard calendar method.
HEALTHBlood Pressure Category CheckerSee which official AHA category a reading falls into.
HEALTHUrgent Care vs. ER Decision ToolA symptom-based guide to choosing where to go.
HEALTHHealth Insurance Cost EstimatorEstimate what you would owe based on your deductible and plan.