Body • Weight
BMI (Body Mass Index)
Estimate adult BMI. Women-friendly defaults.
Women-First • Fast • Free
Trusted Women’s Health Calculators & Wellness Tools
Accurate, simple, mobile-friendly tools for daily health: BMI, BMR, TDEE, Water Intake, Menstrual Cycle & Ovulation, Pregnancy Due Date & Week, Ideal Weight, Body Fat %, and more. Built for clarity, privacy, and speed — not medical advice.
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Women’s Health Calculators
Discover all your favorite women’s health calculators in one place at TrendingsUSA.com. From a simple Period Calculator that predicts your next cycle, to a Pregnancy Week Tracker that guides you week by week, a PCOS Risk Checker to know your chances, and a BMI & Water Intake Calculator for daily health — everything is free, quick, and easy to use. These tools are designed to help you stay informed, whether you are planning pregnancy, monitoring your health, or just staying fit and confident.
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Metabolism
BMR — Mifflin-St Jeor (Female)
Calories burned at rest per day.
Nutrition
TDEE / Daily Calorie Needs
Maintenance calories using activity factor.
Hydration
Water Intake
Simple hydration goal based on weight.
Cycles
Next Period Estimator
Rough date from your average cycle length.
Fertility
Ovulation Window
Typical fertile window around ovulation.
Pregnancy
Pregnancy Due Date
Estimate from LMP (Naegele’s rule).
Pregnancy
Pregnancy Week
How many weeks pregnant based on LMP.
Targets
Ideal Weight (Female)
Devine formula estimate from height.
Composition
Body Fat % (US Navy • Female)
Uses neck, waist, hip and height.
Ratios
Waist-to-Hip Ratio
Simple WC/HC indicator.
Ratios
Waist-to-Height Ratio
Waist circumference / height.
Postpartum
Breastfeeding Calories
Adds extra kcal needs by month.
Pregnancy
Pregnancy Weight Gain Range
IOM ranges by pre-pregnancy BMI.
Micronutrients
Calcium Needs (Women)
Age & status based recommendation.
About USA Health Tools
At TrendingsUSA.com, we believe that every woman deserves access to simple, free, and accurate health tools. Our mission is to make women’s health awareness easier by providing calculators for periods, pregnancy, PCOS, BMI, and more — all in one place. We aim to empower women with knowledge so they can make informed health decisions every day.
Privacy-First by Design
Inputs are processed locally in your browser. We do not collect personal data, and there’s no sign up. You stay in control of your information at all times.
Evidence-Based Accuracy
We use widely recognized formulas and clear assumptions, so your results are transparent and easy to interpret for everyday decisions.
Fast, Lightweight Experience
Minimal design, quick load, and mobile optimization. Tools open instantly, and you can use them on low connection or older devices.
What Users Say
“The calculators are so straightforward. I used the ovulation window and hydration tools and finally feel confident about my routine.” — Emily Carter
“Beautiful interface and quick results. The pregnancy due date and week calculators helped me plan appointments without stress.” — Sophia Nguyen
“I appreciate the privacy-first approach. No clutter, no pop-ups—just reliable numbers I can understand at a glance.” — Hannah Brooks
“Ideal for busy mornings. I check TDEE and water intake in seconds and adjust my day accordingly.” — Olivia Turner
“Clear guidance and friendly design. The body-fat and ratio tools gave me context I couldn’t get from a scale alone.” — Chloe Martin
“Everything is organized perfectly. It feels trustworthy, quick, and very practical for everyday health choices.” — Ava Thompson
“The calculators are so straightforward. I used the ovulation window and hydration tools and finally feel confident about my routine.” — Emily Carter
“Beautiful interface and quick results. The pregnancy due date and week calculators helped me plan appointments without stress.” — Sophia Nguyen
“I appreciate the privacy-first approach. No clutter, no pop-ups—just reliable numbers I can understand at a glance.” — Hannah Brooks
“Ideal for busy mornings. I check TDEE and water intake in seconds and adjust my day accordingly.” — Olivia Turner
“Clear guidance and friendly design. The body-fat and ratio tools gave me context I couldn’t get from a scale alone.” — Chloe Martin
“Everything is organized perfectly. It feels trustworthy, quick, and very practical for everyday health choices.” — Ava Thompson
Blog Categories
At TrendingsUSA.com, we not only provide free health calculators but also share valuable insights through our women’s health blog. Our articles cover trending topics like how to track your periods online, pregnancy due date calculation, understanding PCOS symptoms, and healthy lifestyle tips for women. Each blog is written to give you practical health awareness backed with information, and links you directly to the right tool — so you can read, learn, and calculate all in one place.
Privacy Policy
1. Overview
USA Health Tools respects your privacy. Our calculators run in your browser. We do not collect, store, sell, or share personal data.
2. Data Processing
- Inputs stay local: Height, weight, dates, and other values are processed on-device and are not sent to our server.
- No account needed: We do not require login, email, or phone number to use calculators.
3. Cookies & Analytics
By default we do not set tracking cookies. If we enable basic, privacy-friendly analytics in future, we will update this page.
4. Advertising
We follow AdSense policies: clear content, limited ads, no intrusive interstitials, and a good user experience across devices.
5. Third-Party Links
External links (e.g., blog) open in a new tab. Their privacy practices may differ; please review their policies.
6. Contact
Questions? Email us at info@trendingsusa.com.
Medical Disclaimer
All tools on USA Health Tools are for informational and educational purposes only. They are not a substitute for professional medical advice, diagnosis, or treatment.
- Do not rely on these tools for urgent or emergency situations—seek immediate care.
- Always consult your physician or qualified health provider with questions about a medical condition.
- Calculation results are estimates based on standard formulas and typical assumptions.
- Fertility/ovulation tools are not contraception and must not be used to prevent pregnancy.
By using this site, you agree that USA Health Tools is not responsible for actions taken based on the information provided here.
Contact Us
BMI — Body Mass Index
Adult categories: Underweight <18.5 · Normal 18.5–24.9 · Overweight 25–29.9 · Obesity ≥30.
BMR — Mifflin-St Jeor (Female)
Formula (female): 10×kg + 6.25×cm − 5×age − 161.
TDEE / Daily Calorie Needs
Daily Water Intake
Rule of thumb: ~33–35 mL per kg. Needs vary by climate & activity.
Next Period Estimator
Ovulation Window
Pregnancy Due Date (from LMP)
Naegele’s rule: due date ≈ LMP + 280 days (40 weeks).
Pregnancy Week (from LMP)
Ideal Weight (Devine • Female)
Body Fat % — US Navy (Female)
Approximation only. Measure snug, not tight.
Waist-to-Hip Ratio
Waist-to-Height Ratio
Breastfeeding Calories
Typical extra needs ≈ 330 kcal/day (0–6 mo) or 400 kcal/day (7–12 mo), if body weight stable.
Pregnancy Weight Gain Range
Based on IOM guidelines (singleton pregnancy). Always follow your clinician’s advice.
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