Health & Pets calculators
Free health, fitness and pet calculators: TDEE and maintenance calories, walking calories, steps to calories, walking time, 5K and race distances in miles, running pace (min/km ↔ min/mile), 1 rep max (bench, squat, deadlift), cow and dog gestation, military PT scores, Army body fat (WHtR), steps to miles, standard drinks, calorie needs, A1C, clinical scores and formulas (CHA₂DS₂-VASc, FIB-4, QTc, ABPI, A–a gradient, Light's criteria, anion gap, BUN:creatinine, A/G ratio, Centor), dog Benadryl and powerlifting DOTS.
Walking Calorie Calculator
Estimate calories burned walking by weight, speed, time, distance or steps. Uses 2024 Compendium METs and the ACSM incline equation; gross and net kcal.
1 Rep Max Calculator (One-Rep Max)
Estimate your 1RM for bench, squat, deadlift or any lift from weight and reps. Compare 7 formulas side by side, with % of 1RM and rep-max charts.
Benadryl for Dogs Dosage Calculator
How much Benadryl can you give a dog? Enter your dog's weight to get the diphenhydramine dose in mg, tablets and children's liquid (mL).
DOTS Score Calculator (Powerlifting)
Calculate your powerlifting DOTS score from bodyweight and total. Compare lifters of different weights fairly, for men and women, in kg or lb.
Body Recomposition Calculator
Lose fat and build muscle at the same time: get your calorie, protein, carb and fat targets for training and rest days from your stats and body fat.
EER Calculator (Estimated Energy Requirement)
Calculate your Estimated Energy Requirement with the NASEM 2023 equations for adults, children, pregnancy and breastfeeding, at every activity level.
A1C Calculator: A1C to Average Glucose (eAG)
Convert A1C to estimated average glucose in mg/dL and mmol/L, or average glucose to A1C, with the ADA's ADAG formula, ADA ranges, IFCC units and charts.
Weight Loss by Date Calculator
How many calories to lose 10 lb (or any goal) by a set date — using the NIH-researched Hall energy-balance model, not the 3,500 calorie rule.
Winter's Formula Calculator (Expected PaCO₂)
Calculate expected PaCO₂ with Winter's formula (1.5 × HCO₃ + 8 ± 2), plus compensation rules for metabolic alkalosis and acute/chronic respiratory disorders.
Corrected Sodium Calculator (Hyperglycemia)
Correct serum sodium for high glucose with the Katz (1.6) and Hillier (2.4) factors. Enter glucose in mg/dL or mmol/L. For clinicians and students.
Anion Gap Calculator (Albumin-Corrected)
Calculate the serum anion gap with optional potassium and albumin correction, plus the delta ratio for mixed acid-base disorders. StatPearls formulas.
Army Fitness Test (AFT) Calculator
Score the Army Fitness Test: deadlift, push-ups, sprint-drag-carry, plank and 2-mile run points from the official June 2025 tables, general or combat standard.
USMC PFT & CFT Calculator
Calculate your Marine Corps PFT or CFT score and class from pull-ups or push-ups, plank, run or row, using MCO 6100.13A tables and the 2026 combat-arms rule.
Air Force PT Calculator (2026 PFRA)
Score the 2026 Air Force fitness test: 2-mile run or HAMR, push-ups, sit-ups or plank and waist-to-height ratio, from the official AFPC charts.
Navy PRT Calculator (2026 Standards)
Calculate your Navy PRT score and category from push-ups, forearm plank and run, row or swim, using the December 2025 Guide-5A tables in effect for 2026.
Animal Gestation Calculator: Cow, Dog & Horse Due Dates
Cow gestation calculator by breed (Angus, Hereford, Brahman, Holstein) plus dog, horse, sheep, goat, pig and cat due dates, with the normal range for each.
Steps to Miles Calculator
How many miles is 10,000 steps? Convert any step count (1,000–60,000) to miles and km, miles to steps, and walking time, using your height or measured step length.
Army Body Fat Calculator (One-Site Tape Test & 2026 WHtR)
Check the 2026 Army waist-to-height ratio standard (under 0.55) and the old one-site tape test body fat %, with max waist by height and limits by age.
Standard Drinks Calculator (US Drinks & UK Units)
How many standard drinks are in your beer, wine or spirits? Enter size and ABV for US standard drinks (14 g), grams of alcohol, UK units and a weekly total.
BUN/Creatinine Ratio Calculator
Calculate the BUN:creatinine ratio in mg/dL or SI units (urea mmol/L, creatinine µmol/L) and see what a high or low ratio means. StatPearls ranges.
A/G Ratio Calculator (Albumin/Globulin)
Calculate globulin (total protein − albumin) and the albumin/globulin ratio in g/dL or g/L, with reference ranges and what a low or high A/G ratio means.
Centor Score Calculator (Modified Centor / McIsaac)
Score strep throat risk with the Centor criteria and McIsaac age adjustment, with GAS probability by score and IDSA testing guidance. For clinicians.
TDEE Calculator: Total Daily Energy Expenditure
Calculate your TDEE (total daily energy expenditure) from BMR and activity level. Mifflin-St Jeor and Katch-McArdle, calories to lose or gain, and a chart.
CHA₂DS₂-VASc Score Calculator
Calculate the CHA₂DS₂-VASc stroke risk score for atrial fibrillation, plus the 2024 ESC CHA₂DS₂-VA score, with annual stroke rates and guideline thresholds.
FIB-4 Calculator (Liver Fibrosis Index)
Calculate the FIB-4 index from age, AST, ALT and platelets. See the 1.3 / 2.67 cutoffs, the age 65+ rule and what a low, indeterminate or high score means.
A–a Gradient Calculator (Alveolar–Arterial Oxygen Gradient)
Calculate the alveolar–arterial (A–a) oxygen gradient from FiO₂, PaO₂ and PaCO₂ with the alveolar gas equation. Age-adjusted normal values and altitude.
ABPI Calculator (Ankle Brachial Pressure Index)
Calculate the ankle brachial pressure index (ABPI or ABI) for each leg from ankle and arm systolic pressures, with AHA/ACC and NICE interpretation bands.
QTc Calculator (Corrected QT Interval)
Calculate the corrected QT interval from QT and heart rate or RR with Bazett, Fridericia, Framingham and Hodges formulas, plus normal and prolonged QTc limits.
Light's Criteria Calculator (Pleural Effusion)
Apply Light's criteria to classify a pleural effusion as exudate or transudate from fluid and serum protein and LDH, with the serum-effusion albumin gradient.
5K in Miles: 5K, 10K, Half Marathon & Marathon Distances
A 5K is 3.107 miles. Convert 5K, 10K, 15K, 25K, half marathon and marathon to miles, with steps, walking times and finish-time pace tables.
Running Pace Converter: min/km ↔ min/mile
Convert running pace between minutes per km and minutes per mile, or to mph and km/h. Pace charts, race finish times and treadmill speed tables.
Steps to Calories Calculator
How many calories do 10,000 steps burn? Convert steps to calories by weight, height and pace, using measured walking energy costs, with a step-count chart.
Walking Time Calculator: How Long to Walk a Distance
How long does it take to walk 1, 3, 5 or 10 miles or km? Get walking time by pace, age-typical speeds, and arrival time for any distance or step count.