LongevityMate Tools
Free health calculators that explain the answer
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79 reviewed tools
FreeWeight and nutrition
Protein per 100 g calculator
Convert protein grams per serving and matching solid-food serving weight into grams of protein per 100 g. Free, private label arithmetic.
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FreeWeight and nutritionRecipe scaling calculator
Scale one ingredient quantity from a recipe's original servings to the number of servings you want. Exact ratio arithmetic with no hidden unit conversion.
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FreeWeight and nutritionSaturated Fat per 100 g Calculator
Convert saturated fat in a matching food serving to grams per 100 g. Compare like labels with exact arithmetic, clear limits and no personal dietary target.
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FreeWeight and nutritionServings per Package Calculator
Divide package quantity by a matching serving quantity to estimate servings, including fractions. Use the same units and food state; no portion advice.
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FreeWeight and nutritionSodium per 100 g calculator
Convert labelled sodium per serving and its matching serving weight to milligrams per 100 g. Compare like foods on a common basis. Free and private.
Open toolFreeWeight and nutritionSodium to salt converter
Convert food-label sodium in milligrams to salt equivalent in grams, or salt grams back to sodium, using the standard 2.5 factor.
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FreeWeight and nutritionTotal sugar per 100 g calculator
Convert labelled total sugars per serving and matching serving weight into grams per 100 g. Compare like foods on a common basis. Free and private.
Open toolFreeWeight and nutritionWaist-to-height ratio calculator (WHtR)
Calculate your waist-to-height ratio and equivalent percentage in centimetres or inches. See careful measurement guidance and limitations without a risk label.
Open toolFreeWeight and nutritionWaist-to-hip ratio calculator (WHR)
Calculate an adult waist-to-hip ratio in centimetres or inches, with clear tape-measure guidance, uncertainty and no automatic health-risk label.
Open toolFreeWeight and nutritionWeight loss percentage calculator
Calculate weight change as a percentage of your starting weight. See the amount and whether the current value is lower, higher or unchanged.
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FreeFitness and heart health
Distance Unit Converter
Convert known distances between kilometres and international miles using the exact 1.609344 factor. Both directions, clear rounding and no account required.
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FreeFitness and heart healthUnderstand your home blood-pressure average
Build a clear home-reading log, see exactly which readings count, and prepare a useful summary for your clinician.
Open toolFreeFitness and heart healthPace calculator
Calculate pace, elapsed time or distance for a run or walk. See exact metric and imperial pace and speed equivalents with no fitness judgement.
Open toolFreeFitness and heart healthRunning speed converter
Convert one running, walking or treadmill speed between kilometres per hour and miles per hour using the exact international-mile relationship.
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FreeFitness and heart healthSitting time calculator
Add seated work, travel, meals, leisure and other sitting time to see one clear typical-day total. Private, neutral arithmetic with no score or target.
Open toolFreeFitness and heart healthSteps to distance calculator
Convert steps to kilometres and miles using your own measured step length. Exact unit arithmetic, clear uncertainty, no height-based guess.
Open toolFreeFitness and heart healthStrength training volume load calculator
Calculate strength-training volume load from sets, repetitions and external load. Exact kg or lb arithmetic, total reps and clear limitations.
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FreeFitness and heart healthVO₂ max estimate by age
Estimate VO2 max using age plus resting heart rate or a completed one-mile walk. Clear study limits, wearable context and private calculations with no account.
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FreeSleep and recovery
Caffeine intake calculator
Add the caffeine stated on up to six product labels. Exact local arithmetic in milligrams, with no safe-limit, dose or timing advice.
Open toolFreeSleep and recoverySleep duration calculator
Calculate time in bed from bedtime and wake time. Optionally subtract awake minutes for a clearly labelled sleep estimate, with no cycle claims.
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FreeSleep and recoverySleep efficiency calculator
Calculate a descriptive sleep-efficiency percentage from matching asleep and in-bed hours. See the exact formula, impossible-input guard and measurement limits.
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FreePreventive health
Alcohol-free streak calculator
Count completed alcohol-free calendar days between two dates, plus the inclusive streak day and exact weeks-and-days breakdown.
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FreePreventive healthBiological age calculator
Estimate your blood-based PhenoAge with nine biomarkers. Free biological age calculator with clear units, the same LongevityMate formula and honest limits.
Open toolFreePreventive healthCelsius to Fahrenheit converter
Convert one recorded temperature between degrees Celsius and degrees Fahrenheit using the exact scale relationship, without interpreting the reading.
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