How many points is HELPFUL worth in Scrabble?

HELPFUL is worth 15 points in Scrabble.

Is HELPFUL a valid Scrabble word? Yes — 15 points

Yes, HELPFUL is a valid Scrabble word worth 15 points.

Yes, HELPFUL is a valid Words With Friends word worth 18 points.

HELPFUL is a valid Scrabble US/CAN word worth 15 points:

H₄E₁L₁P₃F₄U₁L₁

HELPFUL is valid in Scrabble UK (World) —

H₄E₁L₁P₃F₄U₁L₁

HELPFUL is a valid Words With Friends word worth 18 points:

H₃E₁L₂P₄F₄U₂L₂

You can make 39 words from helpful according to the Scrabble US and Canada dictionary.