Free calculators for fitness, nutrition & women's health.
FemiFitCalc turns a few numbers into clear, science-based answers — from BMI and daily calories to macros, heart-rate zones, ovulation and due dates. Every result comes with the formula and a worked example.
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- Science-based, referenced formulas
- Instant answers with worked examples
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Start with the category that matches your goal — each calculator explains its formula and shows a worked example.
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Six habits behind a healthier you
You don't need a perfect plan — you need a few simple habits, repeated most days. Pick two and start this week.
Eat the rainbow
Build half of every plate from colourful vegetables and fruit. Different colours mean different micronutrients.
Move every day
Aim for 7 000–10 000 steps. Daily movement is the most underrated habit for long-term weight control.
Lift twice a week
Two short strength sessions preserve muscle, boost metabolism and improve everyday energy.
Protect your sleep
7–9 hours of consistent sleep keeps appetite hormones balanced and recovery sharp.
Hydrate intentionally
Roughly 30 ml of water per kilogram of body weight is a solid daily baseline.
Manage stress
Chronic stress raises cortisol — which affects weight, sleep and cravings. Schedule recovery.
Get your full health snapshot now
No sign-up, no installs, no data sharing. Just a quick, beautiful read-out of where you stand and where to focus next.
Free · 100% private · ~15 seconds