Baby Weeks to Months Chart
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Weeks are fixed seven-day intervals; calendar months vary in length. Use this chart only as an approximate reference, then use actual dates for an exact calendar age.
Approximate conversion reference
Approximate average months = weeks × 7 ÷ 30.436875. Four weeks is 28 days, not one average calendar month.
| Weeks | Days | Approximate months |
|---|---|---|
| 4 | 28 | 0.92 |
| 8 | 56 | 1.84 |
| 12 | 84 | 2.76 |
| 26 | 182 | 5.98 |
| 52 | 364 | 11.96 |
Use exact dates
For appointments or records, use the Baby Age Calculator with the birth date and reference date.
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