# of people   Probability
  that at least two people have the same birthday
  You 365      
1 2 364 0.99726 0.99726 0.3%
2 3 363 0.994521 0.991796 0.8%
3 4 362 0.991781 0.983644 1.6%
4 5 361 0.989041 0.972864 2.7%
5 6 360 0.986301 0.959538 4.0%
6 7 359 0.983562 0.943764 5.6%
7 8 358 0.980822 0.925665 7.4%
8 9 357 0.978082 0.905376 9.5%
9 10 356 0.975342 0.883052 11.7%
10 11 355 0.972603 0.858859 14.1%
11 12 354 0.969863 0.832975 16.7%
12 13 353 0.967123 0.80559 19.4%
13 14 352 0.964384 0.776897 22.3%
14 15 351 0.961644 0.747099 25.3%
15 16 350 0.958904 0.716396 28.4%
16 17 349 0.956164 0.684992 31.5%
17 18 348 0.953425 0.653089 34.7%
18 19 347 0.950685 0.620881 37.9%
19 20 346 0.947945 0.588562 41.1%
20 21 345 0.945205 0.556312 44.4%
21 22 344 0.942466 0.524305 47.6%
22 23 343 0.939726 0.492703 50.7%
23 24 342 0.936986 0.461656 53.8%
24 25 341 0.934247 0.4313 56.9%
25 26 340 0.931507 0.401759 59.8%
26 27 339 0.928767 0.373141 62.7%
27 28 338 0.926027 0.345539 65.4%
28 29 337 0.923288 0.319031 68.1%
29 30 336 0.920548 0.293684 70.6%
30 31 335 0.917808 0.269545 73.0%
31 32 334 0.915068 0.246652 75.3%
32 33 333 0.912329 0.225028 77.5%
33 34 332 0.909589 0.204683 79.5%
34 35 331 0.906849 0.185617 81.4%
35 36 330 0.90411 0.167818 83.2%
36 37 329 0.90137 0.151266 84.9%