Birth

2.5 oz

2.75 oz

3 oz

3.5 oz

4 oz

4.25 oz

4.5 oz

5 oz

5.5 oz

1 week

4.50  

5

5.5

6

7

7.5

8

9

9.5

2 weeks

6

6.5

7

8.5

10

11

12

13

13.5

3 weeks

7

8

8.5

10.5

13

14

15

16

17.5

4 weeks

8

9.5

10

12

14.5

16

18

20

21

5 weeks

9

11

11.5

13.5

16

18

20

22

24

6 weeks

10

12.5

13

15

17.5

20

23

24

27

7 weeks

11

12

14.5

17

19

22

25

27

30

8 weeks

12

13.5

16

19

21.5

24

27

29

32

9 weeks

13

15

18

22

23

26

30

33

35

10 weeks

14

16

20

24

25

28

33

36

38

11 weeks

15

17

21

26

28

31

36

39

42

12 weeks

16

18

22

28

32

35

40

43

45

13 weeks

17

20

24

30

34

36

42

45

48

14 weeks

18

22

26

32

36

39

44

47

51

15 weeks

19

23

28

34

38

42

46

51

55

16 weeks

20

25

30

36

40

44

49

54

59

17 weeks

21

26

31

38

42

46

51

57

62

18 weeks

22

28

33

39

44

48

54

60

65

19 weeks

23

29

34

40

45

50

56

62

67

20 weeks

24

30

35

41

46

52

58

64

70

21 weeks

25

31

36

42

48

54

60

66

72

22 weeks

25

32

37

43

48

56

62

68

74

23 weeks

26

33

38

44

50

57

64

70

76

24 weeks

26

33

39

45

51

58

65

71

78

25 weeks

27

34

40

46

52

59

66

72

79

26 weeks

27

34

40

47

53

60

67

73

80

18 months

2 lbs

2.5 lbs

3 lbs

3.5 lbs

4  lbs

4.5 lbs

5 lbs

5.5 lbs

6 lbs