Pregnancy, Baby and Fitness Calculators
Calm, plain calculators for pregnancy dates, a baby’s age, protein and activity. Each one shows its working and names its source. Pick the one that matches what you have.
- Pregnancy Due Date CalculatorUse this when you want an estimated due date, and how many weeks you are today.
- Conception Date CalculatorUse this when you have a due date or last period and want to know roughly when conception happened.
- Pregnancy Weight Gain CalculatorUse this when you want the published recommended weight gain range for your pre-pregnancy BMI and week.
- Baby Age Calculator: Weeks and Months OldUse this when you want to know how old your baby is in weeks and months, or their corrected age.
- Protein Calculator: Daily Protein NeedsUse this when you want the recommended daily protein for your weight, in pregnancy or while breastfeeding.
- Calories Burned CalculatorUse this when you want a rough estimate of the energy used by an activity from your weight and time.
- Pace Calculator: Running Pace, Time and DistanceUse this when you know two of pace, time and distance and want the third, with splits.
Not sure which to use?
For dates, start with the due date calculator; the conception date calculator works the other way. Weight gain and protein give published recommended amounts. Baby age counts days, weeks and months. Calories burned and pace are about activity.
These are estimates and ranges for groups, not advice for you. Sources are the American College of Obstetricians and Gynecologists, the National Academies, the NIH, the American Academy of Pediatrics and the Compendium of Physical Activities. See the methodology.