Kryptonian Physiology: Superman's cellular structure is more dense, resilient and biologically more effective than human tissue. Strangely enough, he does not seem to possess superhuman strength levels despite his enhanced cellular ability without his cellular structure charged with yellow solar energy. Without such charging, his strength seems on par for a human of his height and weight who engages in regular physical activity. As an alien he possesses several organs whose functions are not yet disclosed or understood but are believed to be part of and perhaps even the source of his biomatrix force field and reclamation aura. Superman's body also stores energy actively within his bio-cellular matrix as an energy pattern that is linked to his body's electromagnetic field. This energy powers most of Superman's electromagnetic capabilities such as flight and heat vision. Superman's body also stores energy actively within his bio-cellular matrix as an energy pattern that is linked to his body'selectromagnetic field. This energy powers most of Superman's electromagnetic capabilities such as flight and heat vision. It also supplements his physical strength by a factor of 12,000 times or so.
Solar Energy Absorption: Technically, this is the main source of Superman's powers. Because Superman's powers are greatly due to exposure to Earth's yellow sun, his powers have been affected by extreme absorptions of solar power, whether voluntary or involuntary. However, Superman has used this to his advantage in battle in many instances, and to his detriment at certain times.
Superhuman Strength: The exact magnitude of Superman's strength is unknown. This is because Superman's strength, like his other powers, has fluctuated over time, however, his strength should effortlessly range into the multi-megaton level at the very least. While the exact magnitude of Superman's strength is unknown, it is generally accepted that his strength easily surpasses the capacity to lift 1,000,000 tons, but how much more is not known exactly. Arguably the strongest being on the planet and one of the strongest beings in the Universe. Superman has shown feats of strength such as; being seen lifting an enormous pyramid and flying it to Mars without any strain (which can weigh millions and millions of tons depending on their size), he is so strong that he is capable of ripping off the arm of the likes of Darkseid and physically defeating him in combat,he has been able to move the planet Earth away from the Sun while a powerful Cosmic Entity, Starbreaker was pushing it toward the Sun, he is so strong he possesses the strength necessary shatter entire worlds. Superman has been chained to the endless wheels of the Mageddon machinery and his strength was used to move the gears of a weapon whose size dwarfed the entire Earth/Moon system itself.. He can become "supercharged" and exceed his "normal" power levels as evident when his power absorption ability ran amok which needed the Parasite to drain off his excessive power levels.
Invulnerability: Superman's body is nigh-invulnerable. This ability's levels have changed over time. He has taken a blast equivalent to a million nuclear war heads point blank and remained conscious. Currently he is even more durable than in the past. He has entered the Sun and emerged completely unharmed, he has even traveled through Krypton's Red Sun and survived physically unharmed, even though Red Solar Radiation depowers and weakens him. He has been seen to skirt the photosphere of the sun (100,000,000 degrees F). Superman has even been shown withstanding Darkseid's Omega Beams, a feat that was previously considered impossible. Superman was able to survive the nuclear destruction of the entire moon in the year 2995 when he was stuck in the future. The moon had been lined with sufficient nuclear devices to disintegrate it in one shot and Superman was in the center and survived without being hurt at all. Superman has withstood 3 particle beams, each powered by the core of a planet, fired at him. One of these planet-powered beams was a plasma beam capable of leveling a huge city a few times over entirely with a single blast. Most likely his greatest feat of durability recently, is that he was recently able to withstand the destructive power of a Sun exploding and going Nova (A result of Brainiac’s technology.) at point blank range to the planet he was on (Which was eradicated by the force of the explosion with the rest of the surrounding system.) and survived without any visible physical damage although the explosion did knock him out. In addition, his immune system protects him from all toxins and diseases. The most common explanations for his invulnerability are Superman having a super-dense molecular structure and/or a supercharged bio electric "aura" which acts as an invisible "force field" around his body within a few millimeters from his skin, and presumably within his body as well. The proximity of this field to his skin means that loose clothes, for example, may be burned off of him, while cloth that is close to his body is protected by the "aura;" This phenomenon is sometimes cited as Superman's reason for wearing a skin-tight bodysuit. It is sometimes implied that he can unconsciously extend this field to an undetermined extent to protect a greater area, allowing him to carry huge objects within the Earth's atmosphere and without gravity or inertia tearing them apart around his human-sized hands.
Longevity: Superman can live almost indefinitely.
Superhuman Stamina: Superman has the ability to maintain continuous strenuous physical action for an undefined period. Theoretically, most incarnations of the character has unlimited stamina as his enhanced nourishment is produced from the solar energy his cells process. Superman like other Kryptonians does not get tired and does not need to eat or sleep and can be sustained on Solar energy alone. He can also hold his breath for an undefined duration.
Flight: Under one Earth gravity Superman is capable of flying at faster than light speeds. He tends to fly at speeds of Mach 10 in the atmosphere. His control of his flight is perfect and he can perform aerobatic feats such as hovering, flying backwards and even lifting great weights while flying. Superman can fly at speeds many times faster than light..Superman has the ability to fly in outer space. He has been seen to fly to the moon in minutes so we can assume that he can fly faster than that outside of atmospheric interference.
Superhuman Speed: Superman is capable of enhanced reflex action and the ability to move at incredible speeds by sheer force of will. While not nearly as fast as the Flash (Wally West), Superman can move at speeds much faster than light and is one of the fastest beings in the Universe. Superman can match most other speedsters in their ability to perform super fast movements, reactions, and processes. He can use this power to disarm opponents with or without heightened reflexes, catch bullets or shrapnel or cross vast distances in seconds. Superman can also run at incredible speeds and even keep up with most speedsters; he was seen running steadily alongside the flash at a speed of 2000 miles per second (mach 9350) He has been seen flying from the Moon to the Earth in less than 2 minutes. Superman is so fast that he is even able to vibrate through blows akin to what the Flash can do as seen in his fight with Doomsday.
Superhuman Hearing: The ability to hear any sound at any volume or pitch. The only Earth creature who can detect sounds at the frequency he can is a blue whale (0.01-200,000 Hz). He has shown enough control to block out ambient sounds to focus on a specific source/frequency. He can hear every single heartbeat, as well as the blood pumping through everyone's veins, hear every foot step, every cell phone signal as it lances through the air and more. He can identify a person by their heartbeat, or pick out a single voice in an entire world.
Super Smell: On various occasions, Superman has demonstrated that his sense of smell is significantly enhanced to the point he can smell odours across the entire planet without any problem.
Super Scream: In one instance, Superman was shown to have the ability to project a "super scream" from his vocal cords. He used this ability to cancel out the impending threat of an already exploding nuclear detonation.
Self-Sufficiency: Doesn't need to eat and sleep so long as he's under the effects of yellow sun radiation. His body stores the energy necessary to negate eating and sleeping for an indefinite period.
Healing Factor: In the extreme event that Superman is harmed, either by an alien matching his own strength or other occurence, he has been shown to have the ability to heal almost instantaneously from any wound, assuming that the process is not impeded from some outside factor i.e. Kryptonite. This "healing factor" is supplemented by his stores of solar energy and also seems to be an unconscious ability, as Superman does not seem to have the ability to control when he heals and when he doesn't. Much like a human has no control over their immune system.
Super Breath: The ability to create hurricane force winds by blowing, and to chill his breath in order to freeze a target (this latter ability has also been called "freeze breath" and "arctic breath"). The ability to chill inhaled air is a function of Superman's great strength and invulnerability. When Superman takes air into his lungs they compress the incoming gas. When this gas expands upon exhalation, in a fashion analogous to the operation of an air conditioners compressor, the sudden increase in volume of the gas causes its temperature to drop proportionally to the size of this expansion. Superman can also breathe in large amounts of air, an ability used when dealing with and disposing things like clouds of poison gas.
Heat Vision: The ability to fire beams of intense heat at a target by looking at it with the conscious act of activating this power. Visually, the power is typically depicted as two beams of red light firing from his eyes. These beams can be made invisible, allowing Superman to work undetected. His heat vision is so powerful that they are able to power up the giant ion planet moving engines with his heat vision alone, annihilate an entire army of Doomsday clones in one blast, and has even been stated to rival the heat of a Star. The area of effect can be consciously determined by Superman, down to the microscopic level. Recent stories imply the precision is so exact it can bypass a target's outer shell (not causing damage to a person's skull for surgical purposes).
Super Vision: He also possess a superior sensory arrangement of microscopic, telescopic, infrared and ultraviolet visual capabilities. He is able to see the entire spectrum. STAR Laboratories has not been able to complete define how Superman has been able to utilize his powerful senses, part of the mechanism is physical, part of it is believed to be psionic in nature. Abilities include:
Electro-magnetic Spectrum Vision:Superman can see into all of the EM Spectrum. He can see and identify radio/television and any and all broadcast/transmitted frequencies, allowing him to avoid detection through radar or satellite monitoring methods. Superman can see the aura that every living thing generates.
Telescopic Vision: The ability to focus his vision to see something at a great distance, without violating the laws of physics.
Microscopic Vision: The ability to see extremely small objects and images down to the sub atomic level.
X-Ray Vision: The ability to see through anything except lead. Opponents sometimes used lead-lined constructs in an attempt to hide things from Superman. He can see things behind a wall as if the wall were not there, or can "peel back" layer after layer of matter in his mind. Kal-El is able to focus his vision past layers of matter, literally seeing "through" them -- possibly perceiving x-rays, cosmic rays or other forms of energy invisible to normal human vision which pass through Earth's atmosphere (and solid objects) after emission from stars. Since it is passive, this ability would not generate harmful radiation in the same manner as a focused projection of hard X-rays.
Energy Matrix: The radical mutation that had taken over Kal-El had turned him into an energy based life form that didn't normally exist wholly within this plane of reality.
Energy Form: Superman loses his traditional powers and transforms into a being of electromagnetic energy. In order to maintain physical cohesion in this form, he needs to wear a containment suit.
Lightning Bolt Travel: ability to travel as a bolt of lightning landing with a jolt when ever he landed.
Alter Density: In this form Superman can become intangible allowing him to phase through solid objects or down to the point where he is a normal human, but in this state he possessed no powers and was no more powerful that the average human male.
Electromagnetic Spectrum Manipulation: allows him the ability to influence all forms of energy allowing him to control magnetism, gravitational forces, radiation and electricity.
Electromagnetic Spectrum Sight: see in vastly expanded and different radiation spectra frequencies of energy.
Electrical Absorption: draw power from electrical sources.
'Solid Field': ability to produce a solid field that allowed him to physical interact with objects, he was also able to control the shape and size of his field.
Electronic Link: ability to link with electronic systems such as computers
Electronic Teleportation: travel through systems much like electric current.
Master Combatant: He has been trained by both Wildcat (in Boxing), and Mongul in the fighting arts. Superman has fought and learned from Wonder Woman. He has also learned more advanced martial arts techniques from Batman. 
Genius-Level Intellect: Superman has shown incredible intelligence and computational abilities; his mind works sharply and with extreme speed relative to earth-humans. His analytical powers are impressive — he is able to use his senses to read information directly from machines (and, with careful usage of his heat vision, he can even reprogram machines). Recently after he regained his powers in the "One Year Later" arc, his brain's intelligence has increased and it operates with much greater speed, procession, and analytical prowess, to the point he can recall things in such detail that he knows the ballistic of every shot by Bloodshot before, the vector and mass of each and every one of Riot's bodies, he can see into one of the most advanced Kryptonian Sun Stone Battle Ship and watch energy patterns shift and change, trace command signals at light speed down branching, maze-like pathways whilst, at the same time, finding one small knot of circuitry
Indomitable Will: Superman has shown to have a powerful Force of Will, completely free of evil or temptation. Having been raised by a kindly Kansas farmer and his wife, Superman was taught to protect life and help others. He is very optimistic and never gives up, even when things look bad.
Torquasm Vo: Torquasm Vo is a Kryptonian discipline that Superman uses sometimes. It is basically a means of focusing ones mental discipline to help fight adverse effects such as mental domination. It can be used to manipulate someone's mind. Superman used that ability during his fight against the Eradicator. It was used to create an illusion to let Superman enter inside the Eradicator.
Torquasm Rao: Allows him to tap into his instints and seperate himself from his body.
Leadership: Superman has proven many times over his ability to command respect and inspire others with his charisma, ardor, and idealism. He often serves as the primus inter pares of the Justice League.
Class 100+; the exact magnitude of Superman's strength is unknown but he has demonstrated that his strength is so vast, that he is capable of even moving an object as large as a planet. This ability to move large objects suggests that his apparent strength may be partially psionic in nature due to the laws of physics which place clear limits on a human-sized object moving a planetary-sized one. (Superman would tend to go-through such a body before he could impart a motion to it because of his small size relative to such a body and the essential 'granular' nature of a planets composition. Also, when Superman is shown lifting an object such as a large building, if native strength was all that he employed in the effort, the building would crumble under its own weight.)
Magic: Superman's biomatrix is his most powerful asset, but the strength of this field is also its greatest weakness. It's permeability to certain wavelengths makes Superman vulnerable to certain radiations, particularly magical energies whose chaotic electromagnetic or extradimensional signatures disrupt this forcefield. Superman's vulnerability to magic varies on the special effects of the magic. No magic seems to be able to directly destroy him unless it comes from a semi-divine or divine source. He can be injured and worn down by magical entities. Magic can have powerful and unpredictable effects on Superman and his magical enemies have often proven to be the most dangerous. Recently, Superman has learned more about magic with the help of Zatanna and he is able to counter almost every spell. Magic has unknown effect on him. He was able to survive when he had a magical sword in the chest and a magical arrow in his back. It was during a fight against four Elder Gods. A fight that Superman won. He was able to withstand a magical blast that managed to knockout the entire JLA and both Wonder Woman (magic being) and Zauriel (Angel). He went after the enemy in question and stopped him.
Kryptonite: Since the destruction of Krypton, its remains (rendered radioactive by the explosion) have been spreading throughout the universe as Kryptonite, a crystalline substance whose specific radiation is lethal to Kryptonians native to this reality. The most common form of Kryptonite is Green Kryptonite, and its effect is directly poisonous. Kyrptonite from other realities does not necessarily have the same effects on all Kryptonians. For example, Kryptonite from the Pocket Universe is not as lethal to Superman as Kryptonite that comes from his native reality. Superman was able to survive inside a Red Sun that was surrounded by Kryptonite. We can guess that it doesn't affect him as much as we think.
Kryptonians: On the rare occasions where he has battled other Kryptonians, they seem more easily able to harm one another as well. A noticeable observation is that other Kryptonians appear to develop superhuman abilities immediately upon entering a yellow star system, whereas it took Kal-El many years living under a yellow sun for his powers to develop. (This may be because he arrived on Earth as a toddler. Had he been an adult or perhaps adolescent his powers would likely have manifested themselves much more readily.)
Lead: Superman cannot see through lead with his vision powers.
Solar Energy: Superman abilities will eventually weaken without replenishing his energy reserves with normal (yellow) sun radiation. When exposed to the same red solar radiation as Krypton's red sun Rao, it causes Superman to lose his powers within a large amount of exposure until the exposure to yellow sunlight will reverse this effect.