Cycle & Hormones Calculators
Period tracking, hormone balance and PMS tools. All free, instant, no signup.
Free Menstrual Cycle & Hormone Calculators for Women
Your menstrual cycle is a vital sign. Irregular cycles, PMS, PMDD, hormonal imbalances, and thyroid dysfunction all manifest through cycle patterns — and these calculators help you understand what your data is telling you. Tools cover period prediction, cycle phase identification, PMS severity scoring, luteal phase analysis, hormone balance assessment, and thyroid symptom screening.
Conditions like PCOS, thyroid disease, and endometriosis affect millions of US women and are frequently underdiagnosed. A full hormone panel costs 0–0 without insurance; most are covered when medically indicated. Use these tools to build the evidence base for productive conversations with your OB-GYN or endocrinologist.
Period Tracker
Predict your next period and understand your current cycle phase.
Cycle Syncing Workout
Best workouts and nutrition for each phase of your menstrual cycle.
Period Flow Volume
Estimate your total period blood loss and check for heavy bleeding.
PMS Symptom Tracker
Score PMS severity and screen for PMDD.
Luteal Phase Calculator
Calculate your luteal phase length and screen for luteal phase defect.
Hormone Balance Score
Score your hormonal balance based on energy, mood, sleep, and cycle.
Estrogen Dominance Score
Assess your risk of estrogen dominance from symptoms and lifestyle.
Cortisol Stress Index
Score chronic cortisol load from sleep, stress, and exercise patterns.
Thyroid Function Estimator
Screen for hypo/hyperthyroid tendency based on symptoms.