Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Pregnancy
Fertility & Ovulation Calculator
Predicts how many days until your fertile window opens from how many days ago your last period started, your average cycle length, luteal phase, and how regular your cycles are.
Fill in the required fields to see your result.
Pregnancy
Pregnancy Weight Gain Calculator
Estimates how much weight you should have gained by a given week of pregnancy based on your pre-pregnancy BMI, using IOM-aligned weekly rates. Use it to check whether your current gain is on pace with clinical guidelines.
Fill in the required fields to see your result.
Key differences
| Fertility & Ovulation Calculator | Pregnancy Weight Gain Calculator | |
|---|---|---|
| Category | Pregnancy | Pregnancy |
| Inputs required | 4 | 3 |
| Result | Ovulation Prediction | Recommended weight gain (kg) |
| What it does | Predicts how many days until your fertile window opens from how many days ago your last period started, your average cycle length, luteal phase, and how regular your cycles are. | Estimates how much weight you should have gained by a given week of pregnancy based on your pre-pregnancy BMI, using IOM-aligned weekly rates. Use it to check whether your current gain is on pace with clinical guidelines. |