Health and Wellness Tools
This category collects everyday health tools: calculators for body weight and diet, a food label reference, short breathing and relaxation exercises, a water log, and a set of tools for looking after a dog, cat or other pet. They are for people setting a personal target, checking a number a coach or app gave them, or keeping simple records at home.
18 free tools · no sign-up · no ads
BMI, TDEE calories, protein and water targets, and a calorie deficit planner that gives a goal date.
BMI Calculator
Calculate Body Mass Index and health recommendationsCalorie Calculator
Calculate daily calorie needs and recommendationsProtein Calculator
Calculate daily protein requirementsHydration Calculator
Calculate daily water intake needsCalorie Deficit Planner
Plan calorie deficit for weight loss goals
A searchable reference to 36 food packaging claims, with what each one means and how far to trust it.
Breathing pacers, short relaxation exercises, a stress journal, a water log with reminders and a Life in Weeks grid.
Mental Wellness Tool
Write down what is stressing you, its causes and next stepsWater Reminder
Set reminders to stay hydratedRelaxation Tool
Practice mindful activities for stress relief and mental wellnessBreathing Exercises
Practice guided breathing patterns for relaxation and stress reliefOnline Laughter Yoga
Random developer and everyday jokes for a quick laugh breakLife in Weeks
Visualize your life as weeks lived and remaining for perspective and reflection
Pet age in human years, daily feeding amounts, a weight log, a cost estimate, care reminders and a name generator.
Pet Age Calculator
Calculate pet age in human yearsPet Feeding Calculator
Estimate daily calories and food portions for petsPet Weight Tracker
Track and monitor pet weight changesPet Expense Calculator
Calculate and budget pet ownership costsPet Care Reminder
Set reminders for pet care activitiesPet Name Generator
Generate creative names for pets
Which tool do I need?
Work out how many calories I burn in a day
Estimate BMR and TDEE from age, sex, height, weight and activity, with loss, maintenance and gain targets.
Plan a realistic weight-loss timeline
Check where your BMI sits, then get a daily calorie target, weekly loss and estimated goal date from the deficit planner.
Set daily protein and water targets
Get grams of protein per day from weight, activity and goal, and a water figure adjusted for activity and climate.
Calm down in a couple of minutes
Follow a paced breathing pattern such as box breathing, or step through a short guided relaxation exercise.
Figure out how much to feed my dog or cat
Check the life stage from its age, then turn weight and activity into daily calories and grams of food.
Check what a claim on a food package means
Look up claims such as organic, gluten-free or grass-fed and see how tightly each one is defined.
About Health & Wellness
The fitness calculators share their maths. BMI screens weight against height, the Calorie Calculator estimates daily energy use with the Mifflin-St Jeor equation, the Calorie Deficit Planner turns that into a dated weight-loss plan with floors it will not go below, and the Protein and Hydration calculators give daily targets. Nutrition Tools has one reference, a searchable guide to 36 food label claims. Wellness Tools are guided exercises and trackers: breathing pacers, relaxation steps, a stress worksheet, a water reminder and a Life in Weeks grid. Pet Care has its own calculators and records, from age in human years to feeding amounts and lifetime cost.
Every number here is an estimate from a published formula or rule of thumb, and each tool page explains its own assumptions. This is general information, not medical or veterinary advice. Calculations run in your browser; a few trackers keep data in local storage on that device and none upload it. The water reminder only works while its tab is open.
Guides
- BMR and TDEE Explained: How Calorie Calculators Estimate Your NeedsThe Mifflin-St Jeor equation worked by hand, what the 1.2 to 1.9 activity factors mean, how accurate the estimate is, and how to correct it with your own data.
- What BMI Measures: the Formula, the Cut-offs and Where It FailsHow kg/m² and 703 × lb/in² work, where the 18.5, 25 and 30 cut-offs came from, why children use percentiles, and what BMI cannot see about body composition.
- Box Breathing, 4-7-8 and the Physiological Sigh: How to Do Each OneExact counts, timings and common mistakes for box breathing, 4-7-8, slow 4-6 breathing and the physiological sigh, plus how to pair them with muscle relaxation.
- How Much to Feed a Dog or Cat: RER, Calories and GramsThe RER = 70 x kg^0.75 formula worked through, life-stage factors for puppies, adults and seniors, turning calories into grams or cups, and adjusting by weight.
Frequently asked questions
How accurate are online health calculators?
Good enough for a starting point, not for an individual diagnosis. Prediction equations such as Mifflin-St Jeor are typically within about 10% of a measured resting rate for most adults, and activity estimates add more uncertainty. Your own weight trend over a few weeks is the best correction.
Do the health tools store my weight or other personal data?
Not on a server. Calculators run in the browser, and some put inputs in the page URL so a link can reopen them. The water log, pet weight tracker, pet reminders and expense list are kept in local storage on that device only and are never uploaded.
Which health calculator should I start with to lose weight?
Start with the Calorie Calculator to estimate maintenance, then use the Calorie Deficit Planner for a daily target and a goal date. Add the Protein Calculator to keep protein up during the deficit. BMI is useful context but does not change the plan.
Are the diet and body calculators suitable for children?
No. They are built for adults. BMI adult categories do not apply under 20, where a BMI-for-age percentile is used instead, and the deficit planner only accepts ages 18 to 80. For a child's growth or diet, ask a paediatrician.
Do I need an app to track water, weight or pet care?
Not for basic records. The water reminder logs drinks against a daily goal, the pet weight tracker charts weigh-ins and exports CSV, and the pet care reminder sorts tasks by due date. A phone app is better if you need reminders when the browser is closed.