Choose up to three creatures within range. Each target’s Hit Point maximum and current Hit Points increase by 5 for the duration. Using a Higher-Level Spell Slot. Each target’s Hit Points increase by 5 for each spell slot level above 2.
RollQuest ships the D&D 2024 SRD as a content pack, on a 5e character sheet that does the maths - roll from the sheet and let the numbers work themselves out. Free to start.