Health & Fitness Calculators

Body Mass Index for adults. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

BMI optimized for adult females. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Calculate body fat percentage using the US Navy method. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Basal Metabolic Rate and daily calorie needs. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Calculate calories burned during exercise using MET values. Enter activity, duration, and weight — see calories burned and MET value. Free.

Calculate daily protein intake based on weight, activity, and goal. Enter your metrics — see grams per day with meal-by-meal breakdown. Free.

Ideal weight using 4 medical formulas (Robinson, Miller, Devine, Hamwi). Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Calculate running pace, finish time, or distance for any race. Enter two of three values — see the third with splits for every mile. Free.

Exercise heart rate training zones. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Due date, trimester and weekly pregnancy tracker. Based on clinical and medical guidelines. Instant result with week-by-week context.

Estimate conception date from due date or last period. Enter your dates — see likely conception window, first trimester milestones. Free.

Calculate animal gestation period and expected due date. Enter species and conception date — see gestation length and due date. Free.

Calculate Lean Body Mass quickly and accurately. Enter your values — see the result with the formula, worked example, and unit options. Free.

Estimate blood alcohol concentration (BAC). Enter drinks consumed, weight, sex, and hours — see BAC level and time to sober. Free.

Predict the next 6 menstrual periods from your cycle data. Enter last period and cycle length — see predicted dates for 6 months. Free.

Count days until any future date or event. Enter the target date — see days, weeks, and months remaining with weekday. Free.

Calculate the true cost of your daily commute. Enter distance, transport mode, and frequency — see annual cost in time, money, and CO₂. Free.

Calculate how long it takes to read any text. Enter word count or paste text — see reading time at different speeds (slow/average/fast). Free.

Convert recipe measurements between units. Fast and accurate conversion with formula, worked examples and unit equivalents. Free online tool.

Calculate monitor or TV screen dimensions from diagonal size and aspect ratio. Enter diagonal and ratio — see width, height, area, and pixel density. Free.

Calculate the cost of any meeting. Enter attendees, seniority levels, and duration — see the total cost and encourage shorter meetings. Free.

Compare renting vs buying a home over any time horizon. Enter rent, price, and terms — see break-even point and 10-year cost. Free.

Compare leasing vs buying a car over 3–5 years. Enter lease terms and purchase price — see total cost and ownership comparison. Free.

Estimate moving costs for any distance and home size. Enter origin, destination, and inventory — see cost range for DIY vs full-service moves. Free.

Estimate total wedding costs. Enter guest count, venue, and catering preferences — see itemised budget and average regional costs. Free.

Analyse BP and calculate MAP, pulse pressure. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Assess your risk of developing type 2 diabetes. Enter BMI, age, family history, and lifestyle factors — see risk score with prevention tips. Free.

WHO health risk assessment from WHR. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Calculate 5 training zones using Karvonen method. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Analyse FEV1/FVC spirometry results for lung function. Enter FEV1, FVC, age, and sex — see percent predicted and GOLD classification. Free.

Calculate kidney function (eGFR) using the CKD-EPI formula. Enter creatinine, age, and sex — see eGFR and CKD stage. Free.

WHO height and weight percentiles for children. Step-by-step solution with formula, example dataset and interpretation guide.

Weight-based medication dose calculations. Based on veterinary guidelines. Instant result with breed notes and feeding chart.

Calculate IV drip rate in drops per minute. Enter volume, time, and drop factor — see mL/hr, drops/min, and dose calculations. Free.

Calculate creatinine clearance using the Cockcroft-Gault equation. Enter weight, age, sex, and creatinine — see mL/min result. Free.

Calculate calories burned digesting food (thermic effect of food). Enter macros — see TEF as a percentage of total caloric intake. Free.

Calculate non-exercise activity thermogenesis (NEAT) calories. Enter activity level and weight — see daily NEAT and total TDEE. Free.

Calculate keto macros for a ketogenic diet. Enter weight, height, activity level, and goal — see target grams of fat, protein, and carbs. Free.

Plan your intermittent fasting window. Enter eating start time and hours — see fasting window, eating window, and schedule. Free.

Calculate accumulated sleep deficit. Instant result with amortization table, formula and chart. Free financial calculator.

Discover your sleep chronotype (morning lark, night owl, or intermediate). Enter sleep times — see your type and optimal schedule. Free.

US Navy body fat percentage calculation. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Calculate daily water intake based on weight and activity. Enter body weight and activity level — see recommended fluid intake. Free.

Heart rate recovery as fitness indicator. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Calculate your sweat rate from exercise weight loss. Enter pre/post weight and fluid intake — see sweat rate in mL/hour. Free.

Calculate electrolytes lost through sweating. Enter sweat rate and duration — see sodium, potassium, and fluid replacement needs. Free.

Calculate minute ventilation and alveolar ventilation. Enter tidal volume and breathing rate — see minute volume and dead space. Free.

Optimise supplement timing around workouts. Enter training time and supplement list — see optimal timing for each supplement. Free.

Estimate clearance time for caffeine, alcohol, and nicotine from your body. Enter amount and weight — see hours until elimination. Free.

Estimate blood alcohol concentration and time to sober up. Enter drinks and weight — see BAC curve and hours to reach 0.00. Free.

Calculate Body Roundness Index from waist and height. Enter waist and height — see BRI, visceral fat estimate, and health risk. Free.

Height growth rate in cm/year. Formula, variable legend, worked example and step-by-step mechanics solution. Instant result.

Estimate biological age from lifestyle. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Estimate lung age from FEV1 measurement. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Grip strength vs population norms. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Waist-to-height health risk assessment. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Estimate hearing age from highest frequency. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Estimate skin age from lifestyle factors. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Aerobic and anaerobic training thresholds. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Estimate VO2max from daily step count. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Calculate metabolic rate from body mass using Kleiber's Law. Enter body mass in kg — see basal metabolic rate (BMR = 70 × M^0.75). Free.

Plan alternate calorie intake for weight loss without adaptation. Enter TDEE and target — see high and low day calorie targets. Free.

Maximum single lift from reps and weight. Based on sports science. Instant result with training zone chart and performance guide.

Recommended weight gain during pregnancy. Based on clinical and medical guidelines. Instant result with week-by-week context.

Calculate daily macros (protein, fat, carbs) for your fitness goal. Enter weight, height, activity, and goal — see gram and calorie targets. Free.

Resting and maximum heart rate assessment. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Personalise your daily hydration goal. Enter body weight and activity level — see daily water intake in litres and glasses. Free.

Calculate calories burned running any distance based on body weight. Enter weight, distance, and pace — see net and gross calories. Free.

Assess musculoskeletal risk from daily sitting habits. Enter hours sitting and ergonomic setup — see risk score and recommendations. Free.

Estimate daily blue light exposure from screens and lighting. Enter screen time and device types — see exposure level and sleep impact. Free.

Assess risk of vitamin D, B12, and iron deficiency. Enter diet, sun exposure, and lifestyle — see deficiency risk and sources. Free.

Score your gut microbiome health from dietary habits. Enter fibre intake and lifestyle factors — see gut health score and tips. Free.

Rate your diet on the anti-inflammatory scale. Enter food frequency — see inflammation score with top foods to add or reduce. Free.

Estimate dementia risk based on lifestyle and health factors. Enter age, APOE status, and modifiable risk factors — see risk score. Free.

Assess your hearing loss risk from noise exposure. Enter dB levels and duration — see safe exposure limits and cumulative damage risk. Free.

Measure your digital eye strain risk from screen habits. Enter daily screen hours and break frequency — see risk score and the 20-20-20 rule. Free.

Calculate a longevity score from diet, exercise, sleep, and lifestyle. Enter your habits — see score, ranking, and top areas to improve. Free.

Calculate calorie and nutrient targets for each trimester of pregnancy. Based on clinical and medical guidelines. Instant result with week-by-week context.

Estimate dehydration level from symptoms and fluid loss. Enter weight and fluid data — see percentage dehydration and rehydration needs. Free.

Compare your BMR to age-group averages and find your metabolic age. Enter height, weight, age, and sex — see metabolic age. Free.

Assess lower back pain risk from posture and habits. Enter sitting hours, lifting, and core strength — see risk score. Free.

Score your sleep quality from duration and consistency. Enter bedtime, wake time, and interruptions — see score and tips. Free.

Calculate your athletic recovery score. Enter sleep, HRV, resting heart rate, and soreness — see readiness to train with recommendations. Free.

Assess chronic cortisol and adrenal stress risk. Enter sleep, diet, and stress factors — see risk level and reduction strategies. Free.

Score immune system strength from lifestyle inputs. Enter sleep, nutrition, and exercise habits — see immune score and boosters. Free.

Assess hormonal balance risk from lifestyle factors. Enter sleep, stress, diet, and exercise — see hormone health score. Free.

Score your diet against the Harvard Fertility Diet recommendations. Based on clinical and medical guidelines. Instant result with week-by-week context.

Plot baby weight and height on WHO growth charts and track percentiles. Based on clinical and medical guidelines. Instant result with week-by-week context.

Compare how long different stress relief techniques take to reduce cortisol. Enter technique — see time to measurable effect and evidence. Free.

Calculate your available discretionary time after obligations. Enter work, sleep, and commute hours — see free hours per day and week. Free.

Calculate ROI from productivity tools, training, and workflow improvements. Instant result with amortization table, formula and chart. Free financial calculator.

Score your smartphone usage and digital wellness risk. Enter daily screen time and patterns — see addiction risk score and guidance. Free.

Calculate children's savings and spending from allowance programs. Enter allowance, age, and split — see savings, spending, and charity amounts. Free.

Estimate total adoption costs and federal tax credit. Enter adoption type — see agency, legal, and travel costs with tax credit offset. Free.

Budget planner for family vacations and travel. Based on veterinary guidelines. Instant result with breed notes and feeding chart.

Analyse asset division and support payment finances. Enter marital assets and income — see equitable division and support estimate. Free.

Estimate insurance increase and discounts for teen drivers. Enter current premium and teen's age — see added cost and available discounts. Free.

Calculate total cost of studying at an international university. Enter country and program — see tuition, living, and travel costs. Free.

Compare true cost of nanny vs daycare childcare. Enter nanny salary/daycare rate and children — see annual cost comparison. Free.

Build a savings plan to fund your child by age 18. Enter monthly contribution and return — see balance at 18 and goal achievement. Free.

Annual healthcare costs including premiums and out-of-pocket. Instant result with breakdown, formula and payment schedule. Free financial calculator.

First-year baby costs for new parents. Instant result with breakdown, formula and payment schedule. Free financial calculator.

Total K-12 private school tuition with inflation. Instant result with breakdown, formula and payment schedule. Free financial calculator.

Estimate lifetime care costs and ABLE account funding. Enter care costs — see funding gap and ABLE account growth. Free.

Calculate annual gift exclusion wealth transfers to grandchildren. Enter gift amount and years — see total transfer and estate reduction. Free.

Calculate target emergency fund for families. Enter monthly expenses and children — see 3–6 month target and savings timeline. Free.

Calculate life insurance coverage needed for families. Enter income, debts, and children — see recommended coverage amount. Free.

Calculate adjusted body weight for drug dosing and nutrition. Enter height, weight, and sex — see IBW, ABW, and use cases. Free.

Estimate health risk from body shape measurements. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Calculate ideal body weight using the Devine formula. Enter height and sex — see ideal weight in kg and lb with BMI equivalent. Free.

Calculate lean body mass from weight and body fat percentage. Enter weight and body fat % — see LBM, fat mass, and muscle estimate. Free.

Estimate fat-free mass from body composition. Enter weight, height, age, and sex — see FFM and fat mass with formula used. Free.

Estimate visceral fat from waist circumference and BMI. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Calculate WHR and assess cardiovascular disease risk. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Estimate your biological age from lifestyle and biomarker inputs. Enter metrics — see biological vs chronological age and improvement tips. Free.

Estimate T-score bone density from age and risk factors. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Estimate lifespan based on Blue Zone lifestyle factors. Enter diet, activity, and social factors — see longevity score and comparisons. Free.

Assess cardiometabolic health risk from waist-to-height ratio. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Calculate RMR using the Katch-McArdle formula. Enter lean body mass — see RMR in calories/day and macro targets. Free.

Estimate blood alcohol content based on drinks consumed, weight, gender, and time.