Calculators to cut back on alcohol, smoking and caffeine
20 tools matched to this goal.
Total Body Water Calculator
Estimate your body water using the Watson formula.
Sweat Rate Calculator
Estimate how much you sweat per hour to plan fluid intake.
Pregnancy and Breastfeeding Water Target
Total daily water intake recommended in pregnancy and while breastfeeding.
Kids Water Intake Calculator
Daily fluid needs for children and teens.
Child Caffeine Limit Calculator
Compare a child’s caffeine intake with a commonly cited limit of 2.5 mg per kg per day.
Caffeine Cutoff Calculator
Last time to drink coffee without hurting sleep.
Water Intake Calculator
Daily water needs for your weight, exercise and climate.
Alcohol Units & Calories Calculator
Weekly alcohol units and calories from your drinks.
Blood Alcohol Content Estimator
Rough BAC estimate and time to sober, using Widmark.
Daily Caffeine Intake Calculator
Add up caffeine from coffee, tea, soda and energy drinks.
Smoking Cost & Savings Calculator
What smoking costs and what you save by quitting.
Sun Exposure & SPF Calculator
Estimated time to burn with and without sunscreen.
Alcohol-Free Savings Calculator
Money, calories and units avoided since you stopped.
Quit Smoking Timeline Calculator
See how many days you have been smoke-free and the next health milestone.
Caffeine per Drink Calculator
Estimate the caffeine in your drinks and compare with a 400 mg daily guideline.
Urine Colour Hydration Check
Use the 1–8 urine colour chart to judge hydration.
Heat Index Calculator
Feels-like temperature from air temperature and humidity (°F).
Water Bottle Refill Calculator
How many times you need to refill your bottle to meet your daily water target.
Coffee Spending Calculator
Yearly cost of your daily coffee habit.
Serum Osmolality Calculator
Blood concentration from sodium, glucose and BUN.
Other goals
- Lose weight
- Build muscle
- Eat better
- Get fitter
- Protect my heart
- Manage blood sugar
- Pregnancy & fertility
- Care for my child
- Sleep better
- Mental wellbeing
- Cut back on drink, smoke & caffeine
- Understand my lab results
Related guides
Hidden Calories in Drinks
Liquid calories add up quickly and do not fill you up.
Sleep & Mental WellbeingCaffeine and Sleep: When to Stop
Caffeine lingers in the body longer than most people think.
Lifestyle & PreventionHow Much Water Should You Drink?
The "eight glasses" rule is a guide, not a law.