28 weeks to months: what month of pregnancy is it?
28 weeks pregnant is month 7 of pregnancy, in the third trimester. In calendar terms, 28 weeks is about 6.4 calendar months (6 months and 2 weeks). You’re 70% of the way to a 40-week due date, with 12 weeks to go.
A calendar calculation, not medical advice. Your provider’s dating ultrasound is the reference for your due date. Nothing you type leaves this page.
28 weeks at a glance
| Measure | At 28 weeks |
|---|---|
| Pregnancy month | Month 7 (weeks 28–31) |
| Trimester | Third |
| Calendar months | 6.4 (6 months and 2 weeks) |
| Counting 4-week months | 7.0 |
| Days pregnant | 196 |
| Weeks left until 40 | 12 |
Why some charts say 28 weeks is 7 months and others say 6
Pregnancy months are counted in two ways. Most US pregnancy charts group the 40 weeks into nine “pregnancy months” of four or five weeks each, which puts week 28 in month 7. A calendar month is about 4.35 weeks (30.44 days), so 28 weeks of calendar time is 6.4 months. Both answers are correct for what they measure; your provider will track the pregnancy in weeks.
What’s usually on the calendar around week 28
- You’re in the third trimester, which starts at week 28. (source)
- From week 28 to week 36, visits are usually every two weeks. (source)
- The glucose screening test for gestational diabetes is usually done around weeks 24 to 28. (source)
- The CDC recommends the Tdap (whooping cough) vaccine between 27 and 36 weeks of each pregnancy. (source)
Every pregnancy is different, and your provider’s schedule comes first.
Weeks around week 28
| Week | Pregnancy month | Calendar months | Trimester |
|---|---|---|---|
| 26 weeks | Month 6 | 6.0 | Second |
| 27 weeks | Month 6 | 6.2 | Second |
| 28 weeks | Month 7 | 6.4 | Third |
| 29 weeks | Month 7 | 6.7 | Third |
| 30 weeks | Month 7 | 6.9 | Third |
See every week from 1 to 42 on the pregnancy weeks to months chart.
Questions
Is 28 weeks pregnant 7 months?
On a standard pregnancy chart, yes: week 28 falls in month 7. In calendar time it’s 6.4 months, so counting only finished calendar months gives 6.
What is 28 weeks in months?
Divide the days by the average calendar month: 28 × 7 = 196 days, and 196 ÷ 30.44 = 6.4 months (6 months and 2 weeks). On a pregnancy chart, week 28 is month 7.
How many days is 28 weeks pregnant?
196 days, counted from the first day of your last menstrual period.
What trimester is 28 weeks?
The third trimester.
Track every week on paper
The printable pregnancy planner has this chart, trimester calendars, an appointment log and a 40-week countdown.
Sources
- ACOG, “How Your Fetus Grows During Pregnancy”
- Cleveland Clinic, “Your Prenatal Appointment Schedule”
- CDC, “Vaccinating Pregnant Patients” (Tdap)
This page explains calendar math. It isn’t medical advice; ask your provider about your own pregnancy.