About What Trimester Am I?
Trying to remember which trimester you are in and how many weeks are in each trimester can be difficult but the guesswork is eliminated with a calculator.
Our trimester calculator calculates which trimester you are in now, based on how many weeks' pregnant you currently are.
Each calculation will give you specific information about:
- The trimester you are in
- How many weeks to go in that trimester
- When a new trimester will begin
What is a Trimester?
In general, a trimester refers to a period of three months or thereabouts.
What is a Pregnancy Trimester?
In pregnancy, there are three trimesters, each one defined by particular weeks of pregnancy. The following table shows the three trimesters and the weeks by which they are defined.
Week 0 through
1st Trimester is
Week 14 through
2nd Trimester is
Week 28 through
3rd Trimester is
When does the first trimester end?
13 Weeks and 6 Days
14 Weeks and 0 Days
When does the second trimester end?
27 Weeks and 6 Days
28 Weeks and 0 Days
When does the third trimester end?
40 Weeks and 6 Days