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✓ Medically reviewed by Dr. Priya Sammani (MBBS, PG Dip. FM) | Age — · M/F · BMI —
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Women's Health • Pregnancy & Women’s Health ✓ Medically Reviewed by Dr. Priya Sammani (MBBS, Medical Officer)

Period Calculator

Free Period Calculator & Cycle Tracker. Enter your last period date and cycle length to predict your next 3 periods, ovulation day, and fertile window.

⚡ Auto-filled from your health data
🧬 My Health Data Edit Metrics ▾

📈 Result Spectrum

— Period Calculator
Normal
Normal Borderline High Risk

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❓ Frequently Asked Questions (FAQ)

What is a normal menstrual cycle length?

Clinically, a regular adult menstrual cycle ranges from 21 to 35 days, with 28 days being the population average.

When should I see a doctor for irregular periods?

Consult a physician if your cycles are consistently shorter than 21 days, longer than 35 days, or if you miss 3 consecutive periods without pregnancy.

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Find out exactly when to take a home pregnancy test based on your last period an
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Baby Growth Percentile Calculator (WHO 0–5 Years)

Free WHO Baby Growth Percentile Calculator (0–5 years). Check your infant or tod
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Child Height Predictor

Predict how tall your child will grow using the pediatric Tanner Mid-Parental Ta
⚠️ Important: Medical Disclaimer: This clinical calculator provides educational estimates and does not replace a consultation with a qualified physician.
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