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Health calculators that are actually beautiful
Instant, accurate answers about your calories, BMI, hydration, and ideal weight — with interactive charts, milestone forecasts, and zero clutter.
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Enter your details once and see your entire health picture on one page — BMI, body fat, waist-to-height ratio, calories, ideal weight, protein, water, and steps. Track your progress over time. Free, instant, no sign-up.
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Every tool is free, private, and built on published science.
Nutrition & Diet
Body Composition
Wellness
Peer-reviewed formulas
Every calculation uses published, citable science — Mifflin–St Jeor, WHO BMI ranges, EFSA hydration guidance, and four ideal-weight equations.
Interactive forecasts
Not just a number. See week-by-week weight loss timelines, milestone dates, and animated visual scales that make results instantly clear.
Private by design
Everything runs in your browser. Your weight, height, and goals are never sent to a server or stored anywhere.
Latest from the blog
View all →Wellness
Is Your Waist-to-Height Ratio Healthy? (And Why It Beats BMI)
What's a healthy waist-to-height ratio, how to measure it, and why doctors increasingly trust it over BMI. Plus the one simple rule: keep your waist under half your height.
8 min read
Wellness
What's a Healthy Body Fat Percentage by Age and Gender?
Healthy body fat percentage ranges for men and women by age, what's too low or too high, why women's healthy range is higher than men's, and how to measure yours.
9 min read
Nutrition
How Many Calories Should You Eat to Maintain Weight?
How many calories it takes to maintain your weight, how to find your exact maintenance number (TDEE), why it changes over time, and how to stop slow weight creep.
8 min read
Weight Loss
How Much Weight Can You Lose in a Month? (A Realistic Answer)
How much weight can you realistically lose in a month? Here's what's safe, what's actually fat versus water, why the first month looks fastest, and how to set a target you'll actually hit.
8 min read
Weight Loss
Why Am I Not Losing Weight in a Calorie Deficit?
Eating in a calorie deficit but the scale won't budge? Here are the real reasons — hidden calories, water retention, an outdated TDEE, and tracking mistakes — and exactly how to fix each one.
9 min read
Wellness
Is Walking Enough to Lose Weight?
Can you really lose weight just by walking? Here's how many calories walking burns, how many steps a day you need, why it beats intense exercise for many people, and how to make it work.
8 min read
Wellness
Intermittent Fasting for Beginners: A Simple Guide to 16:8 and Beyond
A beginner-friendly guide to intermittent fasting — what it is, the 16:8, 18:6, 20:4, and OMAD methods explained, whether it works, how to start, and who should avoid it.
8 min read
Weight Loss
How Many Calories Should a Woman Eat to Lose Weight?
A clear, safe answer to how many calories a woman should eat to lose weight — how to find your own number, the 1,200-calorie floor, and why crash diets backfire.
7 min read