Health Calculators & Tools
Understand your cycle with our free, evidence-based calculators. No sign-up or app download required.
Period Calculator
Predict your next 12 period dates based on your cycle length. Know exactly when to expect your period.
Use calculatorOvulation Calculator
Calculate your ovulation date and fertile window. Know your most fertile days for the next 6 cycles.
Use calculatorPregnancy Due Date Calculator
Estimate your due date, current trimester, and gestational age using Naegele's rule.
Use calculatorCycle Length Calculator
Enter multiple period dates to calculate your average cycle length, variability, and regularity.
Use calculatorPMS Symptom Checker
Select your symptoms to understand severity, get personalized management tips, and learn about PMS patterns.
Use calculatorBBT Chart Tool
Track your basal body temperature, visualize patterns, and identify ovulation with an interactive chart.
Use calculator
Want Automatic Predictions?
Skip the manual calculations. Cyla's AI learns your unique cycle patterns and delivers personalized predictions with up to 97% accuracy.
