Your spell bolsters your allies with toughness and resolve. Choose up to three creatures within range. Each target's hit point maximum and current hit points increase by 5 for the duration.
At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, a target's hit points increase by an additional 5 for each slot level above 2nd.
RollQuest ships the D&D 2014 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.