Pregnancy week by week / Week 21
21 weeks pregnant
That’s 5 months — the second trimester, with 19 weeks to go.
Baby size at 21 weeks
Your baby is about 26.7 cm (10.5 in) long and weighs about 0.36 kg (13 oz) — roughly the size of a carrot.
What’s happening at 21 weeks
The baby's movements are getting stronger and more coordinated. Taste buds are working and the baby can taste your meals through the amniotic fluid.
Common symptoms at 21 weeks pregnant
- •Stronger kicks
- •Braxton Hicks may begin
- •Oily skin and acne
- •Stretch marks
- •Swollen ankles
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 21 weeks pregnant today, your due date is around Tuesday, October 27, 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 21 weeks pregnant?
21 weeks pregnant is about 5 months, in the second trimester.
How big is the baby at 21 weeks?
At 21 weeks the baby is about 26.7 cm (10.5 in) long and weighs about 0.36 kg (13 oz) — roughly the size of a carrot.
What are the symptoms at 21 weeks pregnant?
Common symptoms around 21 weeks include stronger kicks, braxton hicks may begin, oily skin and acne, stretch marks. Symptoms vary a lot from person to person — contact your provider if anything worries you.
When is my due date if I am 21 weeks pregnant?
If you are exactly 21 weeks pregnant today, your estimated due date is around Tuesday, October 27, 2026 — 19 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.