Howard has not yet featured in 2015 due to the calf problem he sustained in the 1-0 Boxing Day defeat to Stoke at Goodison Park.
Asked about the 35-year-old United States international at his press conference to preview the Chelsea game, Everton boss Roberto Martinez said: "Tim has been working really well.
"He trained well on Monday, so I expect that he is fully fit now for any sort of games."
Joel Robles has been playing in goal for the Toffees since Howard suffered his injury and the 24-year-old Spaniard has kept clean sheets in his last three games, including Saturday's Merseyside derby.
Martinez has expressed his delight at the form his compatriot has shown, but at the same time made it clear Howard will be reclaiming the starting spot from Robles.
"Whenever Tim is fit, he is our number one, with the experience he has and what he represents in the squad," the manager said.
"I have total faith in him and it is great to see him fit and training again and having a massive influence in our squad.
"The goalkeeping position is different to any outfield one - I do feel the outfield positions are more about moments of form, ways of playing against the opposition, different ways of approaching games.
"But in goal, I think you need a bit of stability.
"Joel has been really good - I have been so pleased with his last two performances.
"I think the clean sheets against Crystal Palace and Liverpool have shown the size of the goalkeeper we have.
"He is still a young man in terms of amount of games, but he is someone with a real good future
I have been so proud of his performances."
Source : PA
Source: PA