Ovulation Calculator
Estimate an ovulation date and fertile window from the first day of the last period and usual cycle length.
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Read practical articles connected to this calculator.
Why Does Weight Fluctuate Day to Day?
Weight can fluctuate day to day because the scale measures everything in your body at that moment—not only body fat. Fluid, food and drink, bowel contents, menstrual changes, exercise recovery, medicines, and measurement conditions can all move the number. Compare readings taken under similar conditions, look at a longer trend, and get medical advice for sudden unexplained change or swelling.
Fitness & MovementHow to Start Exercising Again After a Break
To start exercising again after a break, use your current capacity—not your old routine—as the baseline. Begin with short, comfortable sessions, keep recovery days, and change one variable at a time. Stop for warning symptoms, and get individualized advice when illness, injury, pregnancy, disability, or a chronic condition changes safety.
Fitness & MovementMovement During Pregnancy and After Birth: A Guide That Starts With Recovery
Updated guidance says movement can support health during pregnancy and after birth. The useful plan starts with symptoms, recovery, and your care team's advice.
NutritionAre Frozen Vegetables as Healthy as Fresh?
Frozen vegetables can be as healthy as fresh vegetables. Nutrient levels vary by vegetable, storage time, processing, and cooking method, so fresh does not always win and frozen does not always win. Choose plain vegetables you enjoy, check sauces and sodium, cook them well, and use the form you will reliably eat before it spoils.
Estimated ovulation date
August 2, 2026
This calendar estimate cannot confirm ovulation and is not reliable contraception.
Estimated fertile window: July 28, 2026 to August 3, 2026. Cycles can vary even when they are usually regular.
These results are educational estimates, not a diagnosis or treatment plan. For personal medical advice, pregnancy guidance, chronic conditions, eating concerns, or medication decisions, speak with a qualified health professional.
Related guides
Read practical articles connected to this calculator.
Why Does Weight Fluctuate Day to Day?
Weight can fluctuate day to day because the scale measures everything in your body at that moment—not only body fat. Fluid, food and drink, bowel contents, menstrual changes, exercise recovery, medicines, and measurement conditions can all move the number. Compare readings taken under similar conditions, look at a longer trend, and get medical advice for sudden unexplained change or swelling.
Fitness & MovementHow to Start Exercising Again After a Break
To start exercising again after a break, use your current capacity—not your old routine—as the baseline. Begin with short, comfortable sessions, keep recovery days, and change one variable at a time. Stop for warning symptoms, and get individualized advice when illness, injury, pregnancy, disability, or a chronic condition changes safety.
Fitness & MovementMovement During Pregnancy and After Birth: A Guide That Starts With Recovery
Updated guidance says movement can support health during pregnancy and after birth. The useful plan starts with symptoms, recovery, and your care team's advice.
NutritionAre Frozen Vegetables as Healthy as Fresh?
Frozen vegetables can be as healthy as fresh vegetables. Nutrient levels vary by vegetable, storage time, processing, and cooking method, so fresh does not always win and frozen does not always win. Choose plain vegetables you enjoy, check sauces and sodium, cook them well, and use the form you will reliably eat before it spoils.
How to use this result
Use the estimate as a starting point for learning and planning. Recheck the inputs, compare the result with how you feel day to day, and ask a qualified professional before making major changes to diet, exercise, medication, or pregnancy-related decisions.