While he is incredibly strong and powerful, there are limits to what he can accomplish, and lifting the Earth would likely be beyond those limits. So while Thor is undoubtedly a powerful character, it is unlikely that he could lift the Earth with Mjolnir, at least in the Marvel Comics universe.
Thor: 3,500 lb.
Assessing Thor's strength might be even harder than the Hulk. Basing it off his pitches with the hammer Mjolnir won't help us either; the mystical mallet's weight is a mystery, and while we can't be sure, it seems to be psionically connected to him, flying where he wants.
Notably, many of Thor's greatest feats have to do with lifting or throwing entire planets out of orbit (or objects that weigh as much as planets). He lifted the World Serpent – a creature weighing trillions of tons, using only his strength and a magic fishing rod.
He has lifted the weight if 20 planets in 1aone comic. He overpowered and broke the grip of the Midgard Serpent.
Thor / Odin
In the comics, The Norse God of Thunder can destroy planets, control the weather (including summoning lightning bolts), fly through space at the speed of light, and even break adamantium. That's right, Thor could smash Wolverine's metal skeleton if he wanted to. He has beyond class 100 strength.
There were times when he even overpowered the Incredible Hulk – a feat that not even Thor could complete. So, when it comes to physical strength, Hercules is the strongest. It was shown multiple times throughout comics.
Wonder Woman is very strong, but Thor is physically stronger. Although Hulk bested him on more than one occasion, Thor is one of the few beings who can even attempt such a battle without getting killed. In addition, with Mjolnir he can use it to strike opponents, to fly and to yield lightning.
Superhuman Stamina: His stamina is almost limitless. Thor survives the Time Stone of time. While still aging physically, he retains his youthful appearance far longer than humans, barely changed after Thanos used the Time Stone to age by several centuries, and will only grow stronger the older he gets.
Odin is the most powerful of the Asgardian gods. Possessing the massive energy source called the Odinpower, or Odinforce, Odin's physical abilities are augmented, including superhuman strength, lifting up to 75 tons, superhuman durability, and regenerative powers.
UNLIMITED STRENGTH
The answer; there isn't one. The amazing thing about the Hulk is that unlike nearly every other superhero ever created, the Hulk's strength has absolutely no upper limit. He can lift a commercial airplane – which weighs around 100 tons – when he is at his calmest; that's no problem for him.
He gained many abilities. Godlike strength: Thor has limitless strength and can power himself even more by charging himself with lightning. He was able to bend Captain America's shield, then bend it back perfectly back to shape. He's the second strongest Avenger.
Hulk has traditionally been seen as the strongest Avenger physically — and for good reason, though he's been subdued by both Iron Man and Thor.
Presumably, then, Thanos possessed at least Class 100 strength, enabling him to lift (press) over 100 tons. Known Superhuman Powers: Thanos possessed incalculable superhuman power.
Thor, who was the strongest of the gods, grabbed the cat by the middle and tried to lift him. The cat didn't budge. So Thor tried as hard as he could, and managed to lift the cat a few inches from the floor.
For example, Marvel – which publishes the Thor comics – issued a “Thor's Hammer” trading card in 1991 that states Mjolnir is made of Uru and weighs precisely 42.3 pounds.
Yes, even Spider-Man has been worthy of holding the hammer of Thor. This is not your father's Spider-Man (well, actually, it could be if your dad was a kid in 1993), but instead is the Spider-Man of Marvel's distant future of 2099!
Thor lifted the weight of 20 planets with one arm (132 sextillion tons). Thor lifted the Midgard Serpent, a snake large enough to coil around Earth and crush it in its grip. The Midgard Serpent weighs about 17 trillion tons while it was constricting the Earth with a force of 272 trillion tons.
Superhuman Strength: Like all Olympians, Zeus is superhumanly strong. His strength is far superior to the vast majority of his race and he is capable of lifting over 100 tons, without supplementing his strength with his other powers.
How much can Thor lift at his base form? Infinite weight. He was able to lift a book which had infinite pages when he was a kid.
While Thor is powerful and his strength is said to be unmatched, he is not strictly immortal like other mythological gods. He is susceptible both to aging and to being killed in battle.
Thor is Immortal, Not Invincible
In Avengers: Infinity War, Thor revealed that he was over 1500 years old. It's clear that age doesn't affect him the way it does normal mortals, as with most immortals, he is aging at a slower rate. While Thor will eventually die, it will take thousands of years for it to happen.
MPAA. Rated PG-13 for intense sequences of sci-fi violence and action, language, some suggestive material and partial nudity.
As strong as Thanos is, Thor is actually stronger and has landed some gnarly punches- as well as Mjolnir blows- on the Mad Titan. However, strength hasn't been enough for Thor to beat Thanos. Physical strength is great and usually is enough against most people Thor fights, but it's never helped against Thanos.
Loki and Thor are both gods and have immense godly powers that make them somewhat impervious to harm, though they can be beaten; they can lose eyes (Thor) and they can die (Loki). If the metric is physical strength, then Thor is easily the winner.
Thor Vs Superman: Who is Stronger? By most accounts, Superman seemingly outclasses Thor in terms of raw strength, especially in earlier versions of the DC Universe. He's pulled planets, punched people into orbit and performed all sorts of wild feats of strength.