Wellness & Lifestyle
Everyday lifestyle choices — sleep, smoking, alcohol and more — shape your health over time. Our free wellness and lifestyle tools help you understand your sleep needs, the cost and impact of smoking, and other wellbeing measures — clearly and practically. These tools are for education and motivation; for personalised advice or support, your doctor is the right source.
Blood Alcohol Content (BAC) Calculator
Estimate your blood alcohol content based on drinks, body weight, sex and time. An educational estimate only — never use it to decide whether to drive.
Smoking Cost Calculator
See how much smoking really costs you over a day, month, year and decade. A clear look at the financial side of quitting — alongside the health benefits.
TSH Level Interpreter
Understand where your thyroid-stimulating hormone (TSH) result falls within general reference ranges.
Liver Enzyme (ALT) Interpreter
Understand where your ALT liver enzyme result falls within general reference ranges.
Ferritin Level Interpreter
Understand where your ferritin result falls within general reference ranges. Ferritin reflects the body's iron stores.
Vitamin B12 Level Interpreter
Understand where your vitamin B12 result falls within general reference ranges. B12 is essential for red blood cells and nerve health.
Folate Level Interpreter
Understand where your serum folate result falls within general reference ranges. Folate is essential for making red blood cells and for pregnancy.
Child & Teen BMI Percentile Calculator
Calculate your child or teenager's BMI and see their exact BMI-for-age percentile using official CDC growth charts. For ages 2 to 20.
Sleep and your health
Sleep is one of the foundations of good health, affecting energy, mood, concentration, immune function and much more. Most adults need around seven to nine hours a night, though individual needs vary. The timing of sleep matters too, as sleeping in line with your body's natural cycles helps you wake feeling more refreshed.
Our sleep calculator helps you work out ideal bed and wake times based on natural sleep cycles, so you can plan your rest more effectively. Good sleep habits — a consistent schedule, a restful environment and limiting screens before bed — support better sleep. If you regularly struggle with sleep, our insomnia guide and your doctor can help.
Lifestyle choices that shape health
Some of the biggest influences on long-term health come from daily habits. Not smoking is one of the most powerful things you can do for your health, with benefits beginning soon after quitting. Our smoking cost calculator shows the financial side, which many people find a motivating reminder alongside the health reasons. Moderating alcohol also benefits health in many ways.
These tools are designed to inform and motivate, helping you see the impact of lifestyle choices. They are starting points for reflection and, where relevant, change. For support with quitting smoking, reducing alcohol, or any health concern, your doctor can offer guidance and connect you with effective help.
Using these wellness tools
Our wellness tools include a sleep calculator for planning ideal sleep timing, a smoking cost calculator that totals the financial cost of smoking, and a blood alcohol calculator for general understanding. Each offers practical insight into an aspect of everyday wellbeing.
These tools are for general education and motivation, not medical advice. They offer estimates and information to support healthy choices. For personalised guidance — whether on sleep problems, quitting smoking, alcohol, or any health concern — your doctor is the right person to advise and to point you toward effective support.
Frequently asked questions
How much sleep do I need?
Most adults need around seven to nine hours of sleep a night, though individual needs vary with age and other factors. Quality and timing matter as well as quantity. Our sleep calculator helps you plan bed and wake times around natural sleep cycles. If you regularly struggle with sleep despite good habits, it is worth speaking to a doctor.
What are the benefits of quitting smoking?
Quitting smoking brings benefits that begin soon after stopping and continue over time, improving heart and lung health and lowering the risk of many serious conditions. There are financial benefits too, which our smoking cost calculator illustrates. For support with quitting, your doctor can recommend effective methods and resources that improve your chances of success.
Are these wellness tools medical advice?
No. These tools are for general education and motivation, offering estimates and information to support healthy lifestyle choices. They do not provide medical advice or diagnosis. For personalised guidance on sleep, smoking, alcohol or any health concern, your doctor is the right source and can connect you with effective support.