All players should keep track of the hit point numbers for their characters. Each die gets the constitution add for bonus hit points. Entertainer sub-classes, and first level Bard, are an exception to this.
All player characters get maximum hit points at first level.
All players roll for their character’s starting hit points at second level; however, cavaliers can start at zero level and are an exception.
1. d 4 characters, if roll a 1, then reroll.
2. d 6 characters, if roll a 1 or 2, then reroll.
3. d 8 characters, if roll a 1 or 2, then reroll.
4. d10 characters, if roll a 1 or 2 or 3, then reroll.
5. d12 characters, if roll a 1 or 2 or 3, then reroll.
Two re-rolls allowed. After that, the character gets the roll. So it is still possible to have one hp on a level up.
For multi-class characters.
a. When all of a character’s classes go up at the same time.
example: Roll the particular hit die for each class of your character. Add any Constitution bonus to each die. Total all of these numbers up and divide by the number of character classes.. If the result has a fraction, round off to the nearest whole number. 0.0001 to 0.49 rounds down, 0.50 through 0.99 rounds up.An elf fighter/magic-user rolls a 7 and a 4 on the correct dice and both classes went to second level at the same time. Constitution 18. 7 + 4 + 4 + 2 = 17 divided by 2 = 8.5 for 9 hp. This is added to the first level hp that the character already has. This continues all the way through maximum level.
b. When all of a character’s classes go up at different times the hit points are figured differently.
Chart: example: rolling up hit points for multi-class characters