The result sent the Hammers up to seventh with 36 points from 22 games, just four behind fourth-placed Manchester United.
After the visitors had battled manfully in the opening period, in-form Andy Carroll opened the scoring for West Ham with a simple finish in the 49th minute.
But who was the man of the match? Click through our ratings gallery below...
West Ham 3 Hull 0 player ratings
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Substitute Morgan Amalfitano and the impressive Stuart Downing then applied neat finishes within three minutes of each other as West Ham reignited their top-four challenge with a first league victory since 20 December.
West Ham have more points at this stage of a Premier League campaign than ever before while Hull are 18th, level with Queens Park Rangers and just two points above bottom-of-the-table Leicester City.
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