The Prem Journey | Austprem Ink | Resources and Links

Growth

One of the "big" worries when you have a premature baby is whether they will ever catch up size-wise. Premature babies usually start life weighing considerably less than their full term peers, and it may take a long time before they are even close to the size of others born around the same time as them. 

This chart has been put together to show everyone how the growth of babies can vary enormously. It is meant to provide reassurance, not cause worry, and should be looked at out of general interest. Some children will always be small, others will quickly stack on weight and grow in length. If your child is happy and healthy and progressing well, there probably isn't too much too worry about. If your child is unsettled and miserable, or not reaching developmental milestones, you should have them assessed by your GP, Paediatrician or other health professional. Generally, children should be following a growth curve similar to that in their "Child Health Record" book. Some prems are "below the chart", meaning they are smaller than most other children their age, but may still be growing appropriately. However, if your child is not gaining weight, and/or is dropping further behind other children their age, please have them checked out.

This chart uses "actual age", which is the age of the child from their date of birth.

If you would like your child's information entered on the chart, please email the details, making sure to include the child's name (not for publication, just to make it easier for me to match updates to the correct data as your child grows), gestation and weights and lengths. Please give weights in grams or kilograms if at all possible, and give the information for the child's ACTUAL age (from birth, not from their due date). If you don't have information for a particular week or month, just leave it out.

 All ages are actual.

Chart best viewed with screen resolution of 1280 X 1024 or at least 1024 X 768

ID

Gestation

Birth weight

1
week

2
weeks

3
weeks

1
month

2
months

3
months

4
months

5
months

6
months

9
months

12
months

18
months

2
years

3
years

4 years 

5
years

6
years

7
years

8
years

9
years

10 years 

BH1

23+2
wks

450g
30cm

420g
30cm

 

 

 

 

 

 

1980g
 

 

3660g
 

5000g
 

6500g
71cm

8600g
74cm

9600g
81cm

12.5kg
95cm

13.5kg

 

15kg

 

 

 

ST1

24
wks

582g
30cm

 

 

573g
 

763g
 

1506g
 

2429g
43.7cm

3220g
47cm

3630g
51cm

4120g
 

5350g
59.5cm

6250g
65cm

7610g
71.5cm

9000g
82.3cm

10.45kg
89cm

12.5kg
97cm

15.1kg
106.1cm

 

 

 

 

 

LY1

24+3
wks

695g
32cm

540g
 

 

747g
 

775g
 

1421g
 

2689g
 

3410g
47.5cm

4425g
51cm

5230g

6460g
62.5cm

7680g
57.5cm

9900g
74.5cm

10.9kg
83cm

12.5kg
89cm

 

 

 

 

 

 

 

JD1

24+5
wks

680g
32.5cm

720g
32.5cm

840g
33cm

760g
33cm

820g
33cm

1585g
39cm

2510g
44.5cm

3410g
49cm

4450g
57cm

5160g
58cm

 

8350g
74cm

 

10.5kg
84cm

14kg
95cm

 

 

 

 

 

 

 

CD1

24+5
wks

700g
31cm

710g
31.5cm

780g
33cm

770g
33cm

860g
33cm

1545g
39.5cm

2330g
42.5cm

2790g
49cm

3480g
54.5cm

4310g
56cm

 

8650g
70.5cm

 

11.5kg
83cm

14.5kg
94.5cm

 

 

 

 

 

 

 

SC1

24+6
wks

740g
 

 

740g
 

 

960g
 

1480g
 

1970g
42cm

1920g
47.5cm

3160g
49cm

3770g
52cm

4940g
57.5cm

5620g
65cm

6280g
71cm

8130g
77cm

10.62kg
86cm

 12.2kg
94.5cm

15.05kg
100.5cm

 

 

 

 

 

KP1

25
wks

500g
30.5cm

 


 

 

 

3610g
  

4400g
51.5cm

 

5720g
61.1cm

 

7700g
69cm

9900g
 

11kg
 

11.9kg
90.5cm

14.4kg
101cm

 

 

 

 

 

 

CP1

25
wks

960g
35cm

 

 

 

 

 

3370g
 

5110g
 

6020g
56cm

7300g
 

 

9460g
73.9cm

 

 

 

17.7kg
103cm

 

 

 

 

 

 

MM1

26
wks

830g
34cm

                         

16.1kg
109cm

             

JR1

26
wks

1008g
38cm

990g
 

 

 

 

 

2980g
47cm

3550g
 

4280g
 

4985g
58.5cm

5945g
 64cm

6950g
67.5cm

8500g

9490g

 

 

 

 

 

 

 

 

AA1

26+4
wks

670g
28.5cm

520g

728g

 

 

1380g

1995g
32.5cm

 

 

4380g
54cm

 

8220g
68cm

10.15kg
77.5cm

11.15kg
85cm

 

 

 

 

 

 

 

 

EN1

26+5
wks

524g
30.5cm

 

 

 

588g

1022g

1503g

1944g

 

2295g
44.5cm

 

 

 

 

 

 

 

 

 

 

 

 

AP1

26+5
wks

915g
33cm

755g

890g
 

950g
 

1029g
36cm

2090g
43cm

2260g
43.5cm

2840g
47cm

3950g
53cm

4450g
57cm

6550g
63cm

 

 

 

 

 

 

 

 

 

 

 

TW1

26+6
wks

855g
34cm

 

 

 

 

 

3270g

3425g
49.9cm

3996g

4220g
56.5cm

5970g
63cm

7235g
66cm

 

 

 

 

 

 

 

 

 

 

AE1

27
wks

1063g
37cm

1000g
 

 

 

1330g
 

2265g
 

2995g
48cm

3400g
 51cm

4300g
 

5200g
59.5cm

7100g
66cm

7900g
73cm

 

 

 

 

 

 

 

 

 

 

ED1

27
wks

1174g
38cm

1220g
 

1186g
 

1320g
 

1550g
 

2460g
47cm

3150g
 

3685g
51.5cm

4170g
55cm

4480g
56.5cm

5700g
63cm

 

 

 

 

 

 

 

 

 

 

 

MG1

27+3
wks

850g
32cm

849g
 

885g
36.5cm

1010g
37.5cm

1260g
38cm

1945g
44cm

2795g
47.5cm

3440g
51.5cm

4100g
52.5cm

4760g
56.5cm

6205g
63cm

 

7880g
75.5cm

 

 

 

 

 

 

 

 

 

AW1

27+5
wks

823g
36.5cm

953g

973g

1022g
37cm

1149g
38cm

1830g
41cm

2550g
45.5cm

3040g
46cm

3870g
53cm

5030g
57cm

6760g
64.8cm

7600g
68cm

8790g
74.8cm

9800g
82cm

 

 

 

 

 

 

 

 

 

ID

Gestation

Birth weight

1
week

2
weeks

3
weeks

1
month

2
months

3
months

4
months

5
months

6
months

9
months

12
months

18
months

2
years

3
years

4 years 

5
years

6
years

7
years

8
years

9
years

10 years 

JC1

28
wks

625g
31cm

 

 

 

1055g
 

 

 

3360g
 

3953g
52cm

4615g
54.8cm

6900g
 

7700g
70cm

 

 

 

 

 

 

 

 

 

 

JG1

28
wks

1160g
 

 

 

 

1645g
 

2640g
 

3200g
 

3900g
 

4500g
 

5500g
 

6500g
 

8500g
 

10kg
 

11kg
 

12.5kg
 

14kg
 

 

 

 

 

 

 

MR1

28+4
wks

720g
30cm

 

 

 

 

 

 

2700g
47cm

 

4120g
52.5cm

5680g
59.5cm

6780g
66.5cm

8080g
72cm

9280g
80cm

11.84kg
89.5cm

13.7kg
95cm

15kg
103.5cm

17kg
109.5cm

19kg
115cm

20kg
121cm

21.5kg
125cm

25kg
132cm

SR1

28+4
wks

915g
33cm

 

 

 

 

 

 

2840g
49cm

 

4360g
55cm

5840g
62cm

7000g
68.5cm

8060g
74.5cm

9100g
83cm

10.8kg
91.5cm

12.4kg
98cm

14kg
105cm

16.5kg
112.5cm

18kg
119.5cm

20kg
126cm

22kg
132cm

24kg
139cm

AO1

29
wks

1138g
37cm

1008g
 

1077g
 

 

1392g
40cm

2350g
44cm

3720g

4160g
53cm

5150g
60cm

6760g
62cm

 

 

 

 

 

 

 

 

 

 

 

 

FE1

29+3
wks

1010g
 

1040g
33cm

1167g
 

1292g
 

1542g
38cm

2316g
45cm

2830g
 

3360g
50.5cm

3765g
55cm

4320g
56cm

4995g
62.5cm

 

 

 

 

 

 

 

 

 

 

 

GB1

29+4
wks

1060g
36cm

 

 

 

 

2355g
 

3380g
 

 

5040g
56cm

 

 

 

 

 

 

 

 

 

 

 

 

ML1

30
wks

1300g
39cm

 

 

 

 

2385g
 

3125g
49.5cm

3640g
50.2cm

4840g
56cm

 

6125g
60.5cm

8460g
71cm

 

14.2kg
95cm

 

 

 

 

 

 

 

 

OS1

30
wks

1472g
 

 

 

 

 

2680g
 

3100g
 

4023g
58.5cm

5080g
59.5cm

6700g
 

8300g
70cm

 

 

 

 

 

 

 

 

 

 

 

MR2

30
wks

1890g
40cm

1726g
 

2120g
  

 

2555g
 

3365g
 

4130g
 

4465g
55cm

 

5090g
59.6cm

5945g
62.1cm

6850g
66cm

8450g
74.8cm

 

 

 

 

 

 

 

 

 

DH1

30+3
wks

1640g
42.5cm

 

 

 

2240g
50cm

3325g
50cm

4520g
56cm

5150g
57cm

5630g
60cm

6380g
64cm

7635g
 

11.31kg
77.5cm

13.57kg
74cm

15.1kg
88cm

 

 

 

 

 

 

 

 

HW1

30+4
wks

1265g
39.5cm

 

 

 

 

2760g
47.5cm

3740g
50.3cm

4672g
53.4cm

5640g
55cm

 

7960g
64.5cm

8900g
69cm

9420g
74.5cm

 

 

 

 

 

 

 

 

 

MB1

31
wks

1278g
43.3cm

 

 

1896g
 

2160g
 

3085g
 

3810g
56cm

5070g
58.2cm

5970g
63cm

6250g
65.5cm

7165g
70cm

8230g
74cm

9610g
80cm

10.86kg
88cm

13.77kg
97.5cm

16kg
 

 

20kg
120cm

20.4kg 123.5cm

22.2kg
127.8cm

23.5kg
132cm

25.8kg
137.2cm

ZS1

31
wks

1660g
 

 

1608g
42cm

 

 

2740g
49cm

4050g
53cm

4650g
56cm

5310g
60cm

 

6250g
63cm

7100g
68cm

 

 

 

 

 

 

 

 

 

 

RL1

31+1
wks

1650g
43cm

 

 

 

 

4020g
52cm

4620g
55cm

5908g
57cm

 

 

9458g
70cm

13.05kg
78cm

14.4kg
82.3cm

16.6kg
89.3cm

 

 

 

 

 

 

 

 

 

ID

Gestation

Birth weight

1
week

2
weeks

3
weeks

1
month

2
months

3
months

4
months

5
months

6
months

9
months

12
months

18
months

2
years

3
years

4 years 

5
years

6
years

7
years

8
years

9
years

10 years 

MS1

32
wks

1600g
35cm

1460g

1650g

1860g
41cm

1950g

2340g
44cm

3080g
50cm

3620g
52cm

4075g
53cm

4400g
56.5cm

5300g
62cm

6400g
64cm

 

10.2kg
78cm

 

 

 

 

 

 

 

 

IL2

32
wks

1760g
43cm

1840g

2040g
 

2255g
 

2260g
 

2520g
48cm

3470g
53cm

4520g
 

5630g
62cm

5790g
 63cm

 

9180g
74cm

 

 

 

 

 

 

 

 

 

 

EH1

32
wks

2206g
43cm

 

 

 

2014g
45.5cm

3005g
 

3075g
53cm

4100g
 

5550g
61cm

5850g
62cm

6600g
67cm

7900g
73.5cm

9900g
82cm

 

 

 

 

 

 

 

 

 

IL1

32+2 wks

1777g
41cm

 

1956g
43cm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DM1

32.2
wks

2133g
44.5cm

 

 

 

3040g
48.8cm

3970g
51cm

5020g
56cm

5740g
58.3cm

6970g
63cm

7620g
66.5cm

8885g
71cm

9115g
72.5cm

 

 

 

 

 

 

 

 

 

 

BK1

32+6
wks

1020g
35.5cm

956g
 

1096g
 

1310g
 

1666g
 

2190g
 

2830g
 

3590g
49cm

4170g
52cm

4770g
55cm

5980g
59.5cm

6680g
65cm

 

 

 

 

 

 

 

 

 

 

CS1

33+2
wks

2276g
40cm

 

 

 

2450g
 

2780g
 

3600g
49.5cm

4900g
56cm

5500g
62cm

6550g
63cm

7250g
72cm

8700g
74cm

 

 

 

 

 

 

 

 

 

 

EH2

33
wks

2170g

1920g

2100g

2280g

2600g

5000g

6300g

7200g
61cm

8000g
68.5cm

8600g
71cm

10.2kg
75.5cm

 

 

 

 

 

 

 

 

 

 

 

NP1

33+3
wks

2296g
48cm

2050g

2250g
49cm

2550g
50cm

2650g
51cm

3360g
52cm

4250g
56.5cm

5300g
59cm

6020g
62cm

 

9500g
73cm

10.7kg
79.5cm

11.4kg
83cm

 

 

 

 

 

 

 

 

 

EF1

33+6
wks

1490g
38cm

 

  

1780g
41cm

2010g

2940g
47cm

3900g
50.5cm

4660g
52cm

5180g
57cm

5660g
59cm

6840g
63.5cm

7520g
67cm

8520g
73cm

10.1kg
76cm

11kg
84cm

13.8kg
96cm

 

 

 

 

 

 

CL2

33+6
wks

2510g
48.6cm

2253g
 

 

 

 

3334g
48.5cm

4160g
51.7cm

5564g
59.5cm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ZF1

34
wks

2052g
44.5cm

2010g
 

2055g
 

2180g
 

2360g
 

3350g
 

4800g
56.5cm

 

 

6600g
63cm

 

8750g
 

 

 

11.5kg
83cm

 

 

 

 

 

 

 

JL1

34
wks

2106g
 

 

 

2655g
 

2900g
49cm

4110g
52cm

4590g
 

5290g
56cm

6260g
61.8cm

6990g
65cm

8310g
70.8cm

8880g
 

10.16kg
81.8cm

12.5kg
86cm

13.7kg
92.5cm

 

 

 

 

 

 

 

HS1

34
wks

2340g
47cm

2150g
47cm

2350g
48cm

2500g
49cm

3000g
50.5cm

4090g
53.5cm

4810g
57cm

5510g
60.5cm

5750g
61cm

5980g
62.5cm

8020g
70cm

9050g
73.5cm

10.1kg
78cm

 

 

 

 

 

 

 

 

 

HW2

34+2
wks

2146g
47cm

2090g
 

2180g
 

2600g
 

2850g
 

3345g
 

 

4530g
 

4560g
 

4970g
 

 

 

 

 

 

 

 

 

 

 

 

 

GS1

34+6
wks

2460g
46cm

                                         

BW1

35 
wks

2035g
43.5cm

 

 

 

 

2300g
46.5cm

3410g
50cm

4350g
 

4635g
58cm

5460g
 

6700g
 

7320g
70cm

 

 

 

 

 

 

 

 

 

 

HM1

35+2
wks

1705g
44cm

 

 

 

2640g

3185g

4040g
54.5cm

4665g
57cm

5315g
59.5cm

5630g
61cm

6600g
67cm

7205g
68.5cn

8445g
77.5cm

9625g
81cm

 

 

 

 

 

 

 

 

TR1

36
wks

2700g
49.5cm

2475g
 

2880g
49.5cm

 

3920g
51cm

4185g
53cm

5070g
57.5cm

5625g
60.5cm

6135g
63.5cm

 

7390g
69.5cm

7860g
73cm

9040g
78.5cm

10.5kg
85.5cm

 

13.5kg
96cm

 

 

 

 

 

 

KW1

36
wks

2833g
48cm

 

2840g
50cm

3140g
 

 

4870g
 

5570g
57.5cm

6650g
63cm

6670g
65cm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ID

Gestation

Birth weight

1
week

2
weeks

3
weeks

1
month

2
months

3
months

4
months

5
months

6
months

9
months

12
months

18
months

2
years

3
years

4 years 

5
years

6
years

7
years

8
years

9
years

10 years 

CL1

37
wks

2720g
48.5cm

 

2750g
 

 

3090g
51cm

4210g
54cm

5430g
59cm

6340g
65cm

 

7440g
67.5cm

9250g
 

10kg
77cm

11.47kg
83cm

12.72kg
91cm

17.2kg
103cm

 

 

 

 

 

 

 

NW1

37
wks

2910g
47cm

2695g
47cm

2880g
47.5cm

 

3660g
51cm

4780g
54cm

5250g
56cm

5960g
59.5cm

 

7240g
63cm

 

 

 

 

 

 

 

 

 

 

 

 

CG1

38
wks

3165g
 

2895g
 

3060g
 

3410g
 

3840g
 

4800g
 

5500g
 

6000g
 

6500g
 

7500g
 

8300g
 

9500g
 

10.3kg
 

12kg
 

 

 

 

 

 

 

 

 

TC1

Full
Term

3265g
50cm

 

3640g
53.2cm

 

 

4680g
56cm

6010g
59cm

6090g
62.5cm

6700g
63cm

7100g
67cm

8100g
70cm

8500g
 

9800kg
72cm

11kg
81cm

12.3kg
87cm

 

 

 

 

 

 

 

RB1

Full
Term

3270g
53cm

 

3605g
54cm

 

3990g
55cm

4800g
58.5cm

 

 

 

6275g
65.5cm

6830g
69.5cm

7770g
73.6cm

9285g
81cm

11.21kg
87.2cm

 

 

17.3kg
111cm

 

 

24kg

 

 

DB1

Full
Term

3485g
51cm

3730g
 

 

 

4550g
56.5cm

5250g
60cm

5930g
63cm

6490g
65.5cm

 

6890g
66.5cm

7700g
71.5cm

8170g
75cm

9960g
81cm 

 

14.2kg
93cm

 

 

 

 

 

 

 

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for research or any other purpose without the written permission of Austprem Inc.

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website: www.austprem.org.au 
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