Pregnancy
Calculator

Track pregnancy progress week by week with baby size comparisons, development milestones, and trimester information.

Input

First Day of Last Period

Progress

Week 13 of 401st Trimester196 days remaining

30% complete30%

Due Date

Oct 2, 2026

Gestational Age

12w 0d

This Week

1st Trimester

🫑

Size of a Pea pod

Length

7.4 cm

Weight

23 g

Development

Vocal cords forming; intestines move into abdomen

Week-by-Week Reference

Week	Size	Length	Weight	Milestone
4	Poppy seed	0.1 cm	<1 g	Embryo implants in the uterus; cells begin differentiating
5	Sesame seed	0.2 cm	<1 g	Heart begins to beat; neural tube forming
6	Lentil	0.6 cm	<1 g	Nose, mouth, and ears start to take shape
7	Blueberry	1.3 cm	<1 g	Brain growing rapidly; arm and leg buds appear
8	Raspberry	1.6 cm	1 g	Fingers and toes begin forming; baby starts moving
9	Cherry	2.3 cm	2 g	Essential organs have formed; embryo becomes a fetus
10	Strawberry	3.1 cm	4 g	Bones begin to harden; fingernails developing
11	Fig	4.1 cm	7 g	Baby can open and close fists; tooth buds forming
12	Lime	5.4 cm	14 g	Reflexes developing; eyes move closer together
13	Pea pod	7.4 cm	23 g	Vocal cords forming; intestines move into abdomen
14	Lemon	8.7 cm	43 g	Baby can squint, frown, and grimace
15	Apple	10.1 cm	70 g	Bones becoming visible on ultrasound; taste buds forming
16	Avocado	11.6 cm	100 g	Baby can make sucking motions; eyes are sensitive to light
17	Pear	13.0 cm	140 g	Skeleton changing from cartilage to bone; sweat glands forming
18	Bell pepper	14.2 cm	190 g	Baby can yawn and hiccup; ears reach final position
19	Mango	15.3 cm	240 g	Vernix caseosa coating forms; sensory development accelerates
20	Banana	25.6 cm	300 g	Halfway point; baby measured head to toe now
21	Carrot	26.7 cm	360 g	Baby can taste amniotic fluid; eyebrows and eyelids present
22	Papaya	27.8 cm	430 g	Lips and eyelids more distinct; eyes formed but iris lacks colour
23	Grapefruit	28.9 cm	500 g	Baby can hear sounds outside the womb; lungs developing
24	Corn on the cob	30.0 cm	600 g	Taste buds fully formed; brain growing rapidly
25	Cauliflower	34.6 cm	660 g	Baby responds to familiar voices; skin is becoming opaque
26	Lettuce head	35.6 cm	760 g	Eyes begin to open; lungs producing surfactant
27	Cabbage	36.6 cm	875 g	Baby can recognise your voice; sleep cycles emerging
28	Eggplant	37.6 cm	1005 g	Third trimester begins; baby can blink and dream (REM sleep)
29	Butternut squash	38.6 cm	1150 g	Bones are fully developed but still soft; muscles maturing
30	Cucumber	39.9 cm	1320 g	Baby can grasp firmly; red blood cells forming in bone marrow
31	Coconut	41.1 cm	1500 g	Brain connections forming rapidly; baby processes information
32	Jicama	42.4 cm	1700 g	Toenails and fingernails have grown in; practice breathing
33	Pineapple	43.7 cm	1920 g	Bones hardening; skull remains flexible for delivery
34	Cantaloupe	45.0 cm	2150 g	Lungs and nervous system continue maturing
35	Honeydew melon	46.2 cm	2380 g	Kidneys fully developed; liver can process waste
36	Romaine lettuce	47.4 cm	2620 g	Baby is gaining about 28g per day; dropping into pelvis
37	Swiss chard bunch	48.6 cm	2860 g	Considered early term; baby practises breathing movements
38	Leek	49.8 cm	3080 g	Organ systems are mature; baby continues to build fat
39	Watermelon	50.7 cm	3290 g	Full term; brain and lungs continue to mature
40	Pumpkin	51.2 cm	3460 g	Due date week; baby is ready for birth
41	Pumpkin +	51.5 cm	3600 g	Post-term; healthcare provider may discuss induction
42	Pumpkin ++	51.7 cm	3700 g	Late post-term; medical monitoring recommended