Hellboy's superhuman abilities would seem to stem from his demonic nature. While his specific powers and abilities have never been explicitly listed, Hellboy is much stronger and more physically durable than an ordinary human.
Hellboy is shown to be capable of withstanding wounds that would be fatal to ordinary humans without being incapacitated, as well as recovering from injury at an incredible rate. He has been shown to withstand great impact forces, high caliber bullets, exposure to extremes of both temperature and falls from great heights. He has been savagely beaten by large monsters on several occasions and survived, often with relatively minor injuries. On one occasion, Hellboy directly charged an MG-42 machine gun and took numerous bullets to the chest before destroying the gun. On another, he was impaled by a massive spearhead through the chest, but smashed the handle and charged the attacker, leaving the spearhead buried in the tree behind him.
The extent of Hellboy's strength is unclear, but he has, for example, torn down a large tree and hurled it at an opponent. He has also thrown opponents weighing at least four to five hundred pounds.
Hellboy also seems to age differently from normal Humans. At the time that young Hellboy tried his favorite food, “pamcakes” for the first time, he was technically two years old but appeared to be far older, around age six. In 1954 he already appeared to be a full grown adult, but was in reality about ten years old. His rapid physical maturation is in contrast to his physical rate of aging, which seems to be much slower than normal. Throughout the sixty year span of his life, Hellboy seems to have ceased to age ever since reaching physical maturity.
He also has the innate ability to comprehend ancient and magical languages.
Hellboy has been noted to be able to see farther than the average human
Thanks to his demonic heritage, Hellboy's body is quite resistant against high temperatures and fire without feeling discomfort on several occasions. In the movie version, he even more resilient against heat or burns than his comic book counterpart does, to the point became immune to all forms of fire and burns, including Liz Sherman's flames, and electrocution.
Hand to hand combatant
Although proficient with handguns, Hellboy often chooses to engage in close combat where he can utilize his incredible strength to defeat his enemies. He has also displayed skill with swords and other improvised weapons.
His decades of experience as a paranormal investigator has given him expertise in folklore, magical rituals, the use of charms and curses, paranormal creatures and other related topics.