Health & Fitness Calculators

Blood Sugar Converter

Convert glucose between mg/dL and mmol/L with the exact factor

A1c to Average Glucose Calculator

Convert HbA1c to eAG (ADAG) and IFCC mmol/mol

Cholesterol Converter

Total, LDL, HDL cholesterol and triglycerides, mg/dL to mmol/L

Creatinine Converter

Convert creatinine between mg/dL and µmol/L (factor 88.4)

Vitamin D Converter

Convert 25-OH vitamin D between ng/mL and nmol/L

Hemoglobin Converter

Convert hemoglobin between g/dL, g/L and mmol/L

Lab Unit Converter

Calcium, bilirubin, testosterone, BUN-to-urea, uric acid, ferritin, B12 and more

Sleep Debt Calculator

Weekly sleep shortfall against the CDC range for your age, plus a catch-up split

Sleep Efficiency Calculator

Time asleep divided by time in bed, with the 85% and 90% bands

How Long to Form a Habit Calculator

Dates for the 66-day habit average and the 18 to 254 day range from the Lally study

Streak Calculator

Days left and goal date for a habit or meditation streak, with milestones and total hours

Sweat Rate Calculator

Litres of sweat per hour from your weight before and after a workout

Screen Time Calculator

Screen hours per week and year, share of waking life, and time saved by cutting back

Weekly Exercise Minutes Calculator

Moderate and vigorous minutes against the CDC 150-minute weekly adult guideline

Dental Cost Per Year Calculator

Yearly dental cost with insurance premiums, deductible, coinsurance and annual maximum, against no insurance

Botox Cost Per Year Calculator

Yearly and monthly cost of neuromodulator visits from your own units, price per unit and interval

Botox Per-Unit vs Flat Price Calculator

Compare a per-unit quote with a flat per-area quote and find the break-even number of units

Dermal Filler Cost Per Year Calculator

Yearly and monthly filler cost from your syringes, price and months between touch-ups

Filler Cost Per Month Comparison Calculator

Compare up to three treatment quotes by cost per month of expected results

Aesthetic Clinic Membership Break-Even Calculator

Yearly cost with a clinic membership against regular prices, and the break-even number of visits

Aesthetic Treatment Savings Goal Calculator

Monthly and weekly amount to set aside for your next planned treatment visit

Next Aesthetic Appointment Date Calculator

Dates of your next visits from your last visit and your planned interval in months

Aesthetic Treatment Annual Budget Calculator

Yearly, monthly and weekly budget for toxin, filler and extras, with ASPS average costs for context

Dental Insurance Annual Maximum Planner

Remaining annual maximum, and what you pay doing a large treatment now versus splitting it across two plan years

Braces and Aligner Payment Plan Calculator

Monthly payment and total interest on braces or aligners after insurance and a down payment

Teeth Whitening Cost Per Shade Calculator

Cost per shade, cost per day and boxes needed for whitening strips, from the shades a box gave you

Electric Toothbrush Payback Calculator

Running cost of an electric toothbrush with replacement heads against a manual one, per year and per day

Floss and Mouthwash Cost Per Day Calculator

Daily, monthly and yearly cost of floss, mouthwash and toothpaste from price, package size and use

Filling vs Crown Cost Calculator

Cost over time of repeat fillings against a crown, from your prices, lifespans and coverage

Toothbrush Replacement Date Calculator

Next toothbrush change dates at the ADA 3 to 4 month interval, with brushes and cost per year

Tooth Brushing Timer

A 2-minute brushing timer with four 30-second mouth sections and an optional beep

Calorie Calculator

Calculate daily calorie needs based on activity level

Macro Calculator

Calculate protein, carbs, and fat macros

Body Fat Calculator

Estimate body fat percentage

Ideal Weight Calculator

Find your ideal body weight range

Days Supply Calculator

How long a package lasts: tablets, liquid, inhaler puffs, eye drops and insulin units

Refill Date Calculator

Run-out date and the earliest day a refill may be allowed

Medication Adherence PDC Calculator

Proportion of days covered from fill dates, with an 80 percent check

Medication Schedule Spacing Calculator

Clock times for q4h, q6h, q8h, BID, TID and QID

Medication Taper Schedule Calculator

Tablets and dates for a taper step list your prescriber gave you

Pill Splitting Calculator

Tablets per dose from the dose in mg and the tablet strength

Liquid Medicine Dose Converter

Convert mg to mL and teaspoons from the label concentration

Travel Medication Quantity Planner

How much medication to pack for a trip, with a 90-day check

Caffeine Half-Life Calculator

How much caffeine is left after a drink

Daily Fiber Target Calculator

Grams of fiber per day from your calories, using 14 g per 1,000 kcal

Iron Intake Calculator

Daily iron RDA by age, sex and pregnancy, with the vegetarian 1.8x factor and UL

Calcium Intake Calculator

Add up food and supplement calcium and compare it to the RDA and upper limit

Magnesium Intake Calculator

Magnesium from food and supplements vs the RDA, and supplements vs the 350 mg UL

Potassium and Sodium Ratio Check

Potassium vs its Adequate Intake, sodium vs its limit, and the ratio between them

Daily Caffeine Limit Calculator

Your Health Canada daily caffeine maximum, and how much is left after your drinks

Supplement Label Unit Converter

Convert IU, mcg RAE, mcg DFE and mg NE for vitamins A, D, E, folate and niacin

Karvonen Heart Rate Calculator

Target heart rate in bpm from heart rate reserve and intensity range

Water Intake Calculator

Calculate daily hydration needs

Heart Rate Zones

Calculate training heart rate zones

RPE Chart Calculator

Reps and RPE or RIR to percent of 1RM, working weight or e1RM

5/3/1 Calculator

Wendler 5/3/1 weights by week from your 1RM or training max

Progressive Overload Calculator

Linear load plan by week with an ACSM 2% to 10% step check

Double Progression Calculator

Next session's weight and rep target, then a rep-then-weight path

Weekly Sets per Muscle Group Calculator

Weekly hard sets per muscle against the under-5, 5 to 9 and 10+ groups

Deload Week Planner

Dated week-by-week deload schedule with sets per exercise

Relative Strength Calculator

Bodyweight multiple and size-adjusted strength score

Reps at Percent of 1RM Calculator

Max reps at a percentage of 1RM, and the percentage for a rep count

Powerlifting Points Calculator

Wilks, DOTS and IPF GL scores

One Rep Max Calculator

Estimate 1RM for weightlifting

Grade-Adjusted Pace

Hill pace to flat-equivalent pace (Minetti)

Pace Calculator

Running pace and finish time calculator

Sleep Cycle Calculator

Bedtime and wake-up times in 90-minute cycles by age

Kids Bedtime Calculator

Bedtime window by age and wake-up time from the CSEP sleep ranges

Kids Screen Time Limit Calculator

Recommended daily screen limit by age (CSEP) against your child's weekly hours

Steps to Miles Calculator

Steps to miles, km, walking time and calories

Standard Drinks Calculator

Alcohol units for Canada, US, UK and Australia, with weekly total

FFMI Calculator

Fat-free mass index and normalized FFMI

Barbell Plate Calculator

Plates per side for any target weight, kg or lb

Treadmill Calculator

Pace, incline, METs and calories on a treadmill

Pregnancy Weight Gain Calculator

IOM recommended gain, total and by week, one baby or twins

Max Heart Rate Calculator

Compare Tanaka, Fox, Gellish and Nes, plus Karvonen zones

Protein Intake Calculator

Daily protein in grams and per meal by goal

Hiking Time Calculator

Naismith's rule with ascent, descent and rests

Conception Date

Estimate conception from a due or birth date

Luteal Phase Length Calculator

Luteal days from an LH peak or ovulation day to your next period

Cycle Length Average and Regularity Calculator

Mean, range and standard deviation of your logged cycle lengths

Fertile Window for Irregular Cycles

Calendar-method window: shortest cycle minus 18 to longest minus 11

hCG Doubling Time Calculator

Doubling time and 48 hour rise from two hCG results, with reference rises

Pregnancy Test Timing Calculator

Days past ovulation, the implantation window and when a test is reliable

Gestational Age from CRL Calculator

Hadlock and Robinson gestational age from crown-rump length, with ACOG redating

Period Late Calculator

Days late against your usual cycle, with NHS pregnancy test timing

Perimenopause Cycle Tracker

Cycle variability checked against the STRAW+10 bleeding criteria

Pregnancy Due Date

Calculate expected due date

Ovulation Calculator

Track fertility window and ovulation

Essential Oil Dilution Calculator

Drops of essential oil per carrier amount and dilution %

IVF Due Date Calculator

Due date, week and trimester dates from an embryo transfer

Retinol Schedule Generator

Printable 4-week retinol and skin cycling calendar

Sunscreen Amount Calculator

Grams, teaspoons and fingers for face and body

Body Surface Area Calculator

BSA in m2 from height and weight, Mosteller and Du Bois formulas

Sunscreen Reapplication Timer

Reapply times and countdown by UV index

Prescription Transposition Calculator

Convert plus to minus cylinder: new sphere, cylinder and axis

Spherical Equivalent Calculator

Sphere plus half the cylinder from a glasses prescription

Contact Lens Vertex Distance Calculator

Glasses prescription to contact lens power and back

Pupillary Distance Calculator

Binocular to monocular PD, or average ruler readings

Lens Thickness Calculator

Estimated edge or centre thickness by power, frame and lens index

Reading Glasses Strength Calculator

Starting reading-glasses diopter by age and reading distance

Contact Lens Cost Per Day Calculator

Daily vs monthly contact lens cost per day, month and year

20-20-20 Eye Break Timer

Every 20 minutes, look 20 feet away for 20 seconds

Visual Acuity Converter

20/20 to 6/6, decimal and logMAR in one place

Pack-Year Calculator

Pack-years from cigarettes per day and years smoked, with the USPSTF lung screening criteria shown as information only.

Cigarette Cost Calculator

What cigarettes cost per day, week, month, year and over the years you smoke, from your own pack price.

Quit Smoking Savings Tracker

Days smoke-free, cigarettes not smoked and money saved since your quit date.

Smoke-Free Milestone Timeline

American Cancer Society quit-smoking health milestones placed on your calendar from your quit date.

Vape and Pod Cost Calculator

Weekly, monthly and yearly vape cost from e-liquid or pods, and nicotine mg per day from mL and strength.

Cigarette vs Vape vs Pouch Cost Compare

Side-by-side yearly cost of cigarettes, vaping and nicotine pouches from your own prices.

Rolling Tobacco Cost Per Cigarette Calculator

Cost per rolled cigarette from pouch size, price and grams per cigarette, compared with packs.

Smoking Cost Invested Calculator

What your monthly cigarette spending would add up to if saved or invested at a rate you choose.

Corrected Age Calculator for Premature Babies

Free corrected age calculator for premature babies: subtract the weeks your baby was born early from their actual age, using the American Academy of Pediatrics method…

Race Time Predictor (Riegel Formula)

Free race time predictor using the Riegel formula, T2 = T1 x (D2/D1)^k. Predict 10K, half marathon and marathon times from a 5K, with a selectable fatigue exponent.