Pregnancy week by week / Week 31
31 weeks pregnant
That’s 7 months — the third trimester, with 9 weeks to go.
Baby size at 31 weeks
Your baby is about 41.1 cm (16.2 in) long and weighs about 1.50 kg (3 lb 5 oz) — roughly the size of a coconut.
What’s happening at 31 weeks
The baby can turn its head and is making breathing-like movements. All five senses are now working.
Common symptoms at 31 weeks pregnant
- •Braxton Hicks
- •Leaking colostrum
- •Frequent urination
- •Backache
- •Breathlessness
Every pregnancy is different — you may have all, some or none of these. Contact your doctor or midwife about anything that concerns you.
Count down to your due date
If you’re 31 weeks pregnant today, your due date is around Tuesday, August 18, 2026. Adjust the date below and create a free countdown to share.
First day of your last menstrual period (how doctors date a pregnancy)
⚕️ This is an estimate based on Naegele’s rule (40 weeks from your last period). Only about 1 in 20 babies arrive on the exact due date. Always confirm with your doctor or midwife.
FAQ
How many months is 31 weeks pregnant?
31 weeks pregnant is about 7 months, in the third trimester.
How big is the baby at 31 weeks?
At 31 weeks the baby is about 41.1 cm (16.2 in) long and weighs about 1.50 kg (3 lb 5 oz) — roughly the size of a coconut.
What are the symptoms at 31 weeks pregnant?
Common symptoms around 31 weeks include braxton hicks, leaking colostrum, frequent urination, backache. Symptoms vary a lot from person to person — contact your provider if anything worries you.
When is my due date if I am 31 weeks pregnant?
If you are exactly 31 weeks pregnant today, your estimated due date is around Tuesday, August 18, 2026 — 9 weeks from now. Use the calculator below with your real last-period date for a personalised estimate.
See every stage on the pregnancy week-by-week guide or open the full due date calculator.