Pregnancy calculator - gestational week
Calculate the current gestational week, trimester and estimated due date from your last period.
Gestational week
21 weeks 4 days
Trimester 2
Progress54%
Weeks remaining19
Estimated due dateOctober 8, 2026
Estimate based on 40 weeks (280 days).
Approximate calculation. The exact amount is confirmed by the Social Insurance Board or the Tax and Customs Board - check the official source.
Last updated: 2026-06-03
How is the gestational week calculated?
Pregnancy is counted from the first day of the last period. A full-term pregnancy lasts about 40 weeks (280 days). The first trimester is up to week 13, the second 14-27 and the third from week 28. This is an estimate.