KillNits.com Head lice population calculator



































Table showing the rapid rise in population of head lice from one female head louse.


NOTE:  This is an ideal population growth assuming all eggs hatch and grow to be adults.


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Day

Female Adults

Male Adults

Total Eggs laid

Nymphs

Live lice




1

1

1

6

0

2

14 day old Adult female lays


2

1

1

12

0

2

first 6 eggs per day



3

1

1

18

0

2




4

1

1

24

0

2




5

1

1

30

0

2




6

1

1

36

0

2




7

1

1

42

6

8

Eggs laid on day 1 hatch as nymphs


8

1

1

48

12

14




9

1

1

54

18

20




10

1

1

60

24

26




11

1

1

66

30

32




12

1

1

72

36

38




13

1

1

78

42

44




14

3

3

96

42

48

First generation Nymphs hatched on�


15

6

6

132

42

54

day 7 become adults and start laying own eggs

16

9

9

186

42

60

Original adults die assuming 28 days old

17

12

12

258

42

66




18

15

15

348

42

72




19

18

18

456

42

78




20

21

21

582

54

96




21

24

24

726

66

114

Nymphs of eggs laid by first generation�

22

27

27

888

96

150

become adults and start laying own eggs

23

30

30

1068

144

204




24

33

33

1266

210

276




25

36

36

1482

294

366




26

39

39

1716

396

474




27

48

48

2004

504

600




28

54

54

2328

630

738

Eggs laid by 2nd generation nymphs�


29

69

69

2742

756

894

become adults and start laying own eggs

30

93

93

3300

882

1068

First generation adults die after about 28 days

31

126

126

4056

1008

1260




32

168

168

5064

1134

1470




33

219

219

6378

1260

1698




34

279

279

8052

1422

1980




35

348

348

10140

1602

2298




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