Health Tools

10 free health tools and calculators

Macronutrients Calculator
Professional macronutrients calculator for flexible diet.
Pregnancy Calculator
Calculate your probable due date, weeks of gestation, and current trimester.
Fertile Days Calculator
Calculate your fertile days and ovulation period accurately.
Bra Size Calculator
Calculate your exact bra size with our professional system.
Carbon Footprint Calculator
Calculate your carbon footprint professionally and reduce your environmental impact.
Sleep Debt Calculator & Recovery Planner
Calculate your sleep debt and get a science-backed 7-day recovery plan. Free professional circadian optimization tool.
Sleep Cycle Calculator
Calculate the best time to wake up or go to sleep based on 90-minute sleep cycles. Avoid waking mid-cycle and feel rested every morning. Free, science-based sleep calculator.
Intermittent Fasting & Circadian Optimizer
Calculate your optimal intermittent fasting window aligned with your circadian rhythm. Supports 16:8, 18:6, 20:4, OMAD. Personalized by goal, wake time, and workout schedule. Free.
Caffeine Hydration Calculator
Calculate exactly how much water you need based on your body weight, caffeine intake, and activity level. Includes the caffeine diuretic offset and electrolyte recommendations. Free.
Menopause Symptoms Test
Calculate your probability of being in perimenopause or menopause.

Wellness Tools That Respect Your Body and Your Privacy

Health is personal, and the tools you use should respect that. Everything in this category runs entirely in your browser—no accounts, no cloud processing, no data collection. You enter your information, you get a result, and nothing is stored anywhere.

Here you'll find calculators for sleep cycles, intermittent fasting, fertility windows, pregnancy due dates, macronutrients, and more. They're designed to be approachable if you're just starting to pay attention to your health, but precise enough to support informed decisions.

We also include practical tools like the caffeine hydration calculator and the carbon footprint estimator, because wellness isn't just about your body—it's about how you live in the world. Use them as a starting point, not a diagnosis, and always consult a professional when it matters.

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