As you call out words of restoration, up to six creatures of your choice that you can see within range regain hit points equal to 1d4 + your spellcasting ability modifier. This spell has no effect on undead or constructs.
At higher levels
When you cast this spell using a spell slot of 4th level or higher, the healing increases by 1d4 for each slot level above 3rd.
Mass Healing Word healing by spell slot level
Spell slot level
Healing
Average
3rd
1d4 + mod
2.5 + mod
4th
2d4 + mod
5 + mod
5th
3d4 + mod
7.5 + mod
6th
4d4 + mod
10 + mod
7th
5d4 + mod
12.5 + mod
8th
6d4 + mod
15 + mod
9th
7d4 + mod
17.5 + mod
Averages are the dice’s expected total; “mod” is your spellcasting ability modifier. Roll any row in the dice roller.