DBZ Power Levels by Adam

Saiyan Saga

Farmer w/ shotgun - 5
Turtle - .001
Master Roshi - 167
Krillen - 216
Goku - 320
w/o weighted clothing - 416
Kamehameha - 925
Piccolo - 305
w/o weighted clothing - 408
special beam cannon - 1330
2nd try - 1440
Gohan - 710
enraged - 1,350
Raditz - 1,200

Yajirobe - 200
Yamcha - 232
after training - 1,530
Krillen (after training) - 1,650
Tien - 280
after training - 1,810
Chao-Tzu (after training) - 1,230
Gohan - 1,400
Masenko (enraged) - 2,800
oozaru - 14,000
Piccolo - 2,500
Saibamen - 1200 each
Nappa - 4,000
Goku - 5,000
powered up - 9,000
Kaioken x2 - 16,000
Kaioken x3 - 24,000
Kaioken x4 + kamehameha - 36,000
Vegeta - 18,000
Gallick Gun - 30,000
oozaru - 180,000

Explanation - Most of the PL's listed above were mentioned in DBZ. But some people argue over Goku's powered up state, whether its 8,000 or 9,000. Well, since Vegeta states that it's "OVER NINE THOUSANDDD!", I think my listing is pretty accurate. When a saiyan transforms into an oozaru his power increases 10x, and Goku obviously couldn't overpower Vegeta's Gallick Gun at 3x Kaioken, making Vegeta's attack having to be at least what I have stated.

Frieza Saga

Frieza's Henchmen - 1,500 each
Cui - 18,000
Dodoria - 20,000
Zarbon - 22,000
transformed - 30,000
Gohan - 2,700
after Guru - 24,000
Krillen - 2,350
after Guru - 19,000
Vegeta - 24,000
after Zarbon battle - 35,000
Namekian Warriors - 800 to 7,500

Guldo - 23,000
Recoome - 55,000
Burter - 70,000
Jeice - 75,000
Ginyu - 90,000
max - 120,000
in Goku - 23,000
Vegeta (powered up vs. Recoome) - 45,000
after Recoome battle - 135,000
after Ginyu battle - 405,000
Goku - 90,000
Kaioken x2 - 180,000
Gohan (after Senzu) - 46,000
Krillen (after senzu) - 24,000
Nail - 42,000

Frieza - 530,000
2nd form - 970,000
3rd form - 1,250,000
final form - 1,500,000
50% - 7,500,000
100% - 15,000,000
battle worn - 11,000,000
Krillen - 28,500
Gohan - 52,000
1st enraged - 830,000
after Dende's heal - 206,000
2nd enraged (Masenko) - 1,200,000
3rd enraged - 2,500,000
Vegeta (full power) - 510,000
after Dende's heal - 1,320,000
after revival - 1,750,000
Piccolo - 860,000
w/o weighted clothing - 1,050,000
after Dende's heal - 1,100,000
Goku - 300,000
Kaioken x5 - 1,500,000 (used naturally throughout early Frieza fight)
Kaioken x10 - 3,000,000
Kaioken x20 - 6,000,000
Spirit Bomb - 10,000,000
Super Saiyan - 15,000,000

Most of these PL's aren't certain, although they are the most rational estimates I have. Goku's base and Kaioken x2 levels are stated in the manga as well as Ginyu's, and since him and Goku were about even before he reached his max (120,000), Ginyu's base must have been around 90,000. Vegeta's PL's were determined because he was able to easily defeat Jeice and overpower Ginyu, and after that he was able to hold his own against Frieza in his first form. Finally, since Vegeta was the only one able to follow Frieza's movements in his true form, his PL must have been decently higher than Piccolo's, and even close to that of Frieza's. Vegeta could have put up a good fight if he hadn't given up all hope near the end of the battle, but he was obviously weaker than Frieza was. Regarding Goku's base being at only 300,000, it's very reasonable if thought about. Some say his base was around 2,000,000, but remember, his base when he arrived was only 90,000, so it's very irrational to say that his power increased by over 15x when Vegeta took 3 near death experiences to increase by that much. And another note, during the Saiyan battles the Kaioken technique was stated to be very dangerous to Goku's body, but by the time he arrived on Namek it just became a simple power-up, knowing this it wouldn't be crazy to say that after his near death experience at the hands of Ginyu the first 5 stages of Kaioken would be used naturally just because his body could handle so much more. Oh, and just to clarify, Gohan became furious the third time when he returned to fight Frieza after he thought Goku was dead. He was able to catch Frieza off guard in his 50% form, but did little else.

Cell Saga

Frieza's higher henchmen - 7,500 each
Mecha Frieza - 9,500,000
King Cold - 11,000,000
Trunks (suppressed) - 5
full power - 1,600,000
super saiyan - 16,000,000
Goku - 1,800,000
super saiyan - 18,000,000
Vegeta - 1,900,000
Gohan - 320,000
Tien - 85,000
Yamcha - 78,000
Chao-Tzu - 45,000
Krillen - 107,000
Piccolo - 1,400,000

Goku - 1,950,000
SSJ - 19,500,000
sick - 10,000,000
Vegeta - 2,150,000
SSJ - 21,500,000
Android 19 - 8,000,000
after energy - 12,000,000
Android 20 - 10,500,000
after energy - 13,500,000
Piccolo - 15,000,000
Trunks (SSJ) - 18,000,000
Tien - 850,000
Yamcha - 220,000
Krillen - 680,000
Gohan - 1,300,000
Android 17 - 28,000,000
Android 18 - 28,000,000
Android 16 - 36,000,000
Cell (first appears) - 23,000,000
Kamiccolo - 30,000,000

Cell (after absorbing humans) - 35,000,000
after 17 - 63,000,000
after 18 (what is sensed) - 91,000,000
(actual power) - 120,000,000
Vegeta SSJ- 23,000,000
super vegeta - 92,000,000
final flash - 184,000,000
Trunks SSJ - 21,000,000
super trunks - 84,000,000
ultra trunks - 168,000,000

Goku - 2,700,000
Full Power SSJ Goku - 118,000,000
worn out - 80,000,000
Vegeta (super) - 104,000,000
enraged - 130,000,000
Trunks (super) - 100,000,000
Piccolo - 55,000,000
Cell (Perfect) - 120,000,000
after Senzu - 125,000,000
Full power - 160,000,000
Buff (USSJ) - 320,000,000
Super Perfect - 225,000,000
kamehameha - 275,000,000
Cell Jr.'s - 105,000,000
Gohan - 1,300,000
after spirit room - 2,400,000
SSJ - 24,000,000
Full power SSJ - 89,000,000
SSJ2 - 267,000,000
injured - 200,000,000
kamehameha - 250,000,000
Father-son Super kamehameha - 350,000,000

In terms of Tien's, Yamcha's, and Chao-Tzu's PL's in the Trunks saga, they were able to take out Jeice and Burter, Recoome, and Guldo respectively without much effort, so their PL's had to be noticeably higher. As for Vegeta, his SSJ form was said to be stronger than Goku's, and Trunks states that he couldn't believe his fathers strength. Piccolo was able to dominate #20, and since he and Kami are two halves of a whole being, it would make sense that the fusion would double Piccolo's power. Ascended Saiyan's have 4x the power of normal Super Saiyans and ultra saiyans have 8x that power, but are significantly slower. Although Cell outclassed Vegeta in his perfect form, both Tien and #16 thought that Cell still came up a little short of Vegeta's strength, but Krillen stated that Cell was hiding his true power. Full power SSJ PL's are just estimate's, but though some people argue that Gohan was stronger than Goku, even from the start of the Cell Games, he was not because it wasn't until he went SSJ2 that Vegeta said Gohan had surpassed him. Vegeta powered up to his ultra form to perform final flash, but chose not to fight head on in that form for obvious reasons. SSJ2 has 3x the power of a fully mastered super saiyan. Finally, both Vegeta and Trunks were able to challenge the Cell Jr.'s, so their PL's must have been very close.

Buu Saga

Pikkon - 120,000,000
SSJ Goku - 106,000,000
+ kamehameha - 125,000,000
Great Saiyaman / Gohan - 1,800,000
Full power SSJ - 67,000,000
SSJ2 - 201,000,000
Mystic - 2,000,000,000
Vegeta - 3,300,000
Full power SSJ - 112,000,000
SSJ2 - 336,000,000
majin - 345,000,000
SSJ Goten - 14,000,000
SSJ Trunks - 15,500,000
Piccolo - 75,000,000
Krillen - 1,200,000
Yamcha - 130,000
Shin - 90,000,000
Kibitoshin - 170,000,000
Kibito - 22,000,000
Spopovich - 1,500,000
Yamu - 1,700,000
Dabura - 210,000,000
Pui Pui - 2,200,000
Yakon - 3,000,000
Babidi's Henchmen - 15,000 each
SSJ2 Goku - 342,000,000
SSJ3 - 1,710,000,000
Majin Buu - 400,000,000
evil - 800,000,000
good - 400,000,000
super - 1,200,000,000
w/ gotenks and piccolo - 2,485,000,000
w/ Piccolo - 1,275,000,000
w/ Gohan and Piccolo - 3,275,000,000
kid - 1,600,000,000
Gotenks - 45,000,000
SSJ - 450,000,000
SSJ3 - 1,350,000,000
Vegetto - 2,546,000,000
SSJ - 25,460,000,000

SSJ3 Goku has 5x as much power as he did in his SSJ2 form. Even though Buu's up front power is significantly lower than SSJ3 Goku's, his "well of power", which was evil buu, in addition to his amazing endurance, helped him in that fight...plus Goku was holding back to give those alive the chance to defeat Buu. As with the unfused saiyans, when fused saiyans go SSJ their PL's increase by 10x, but with Gotenks going from SSJ to SSJ3, his power only increases 3x, otherwise he would've completely dominated Super Buu. Mystic Gohan WAS stronger than SSJ3 Goku AND SSJ3 Gotenks, despite what anyone says. Base Vegetto combines the full power of both Goku and Vegeta, and since "their rivalry makes the fusion more complete," an extra 500,000,000 is added on. Pui Pui stood no chance against Vegeta even at base, and Dabura was slightly stronger than Gohan but significantly weaker than Goku and Vegeta. Lastly, Yakon's PL was said to be "3 thousand kili's"... assuming that kili's means thousand, his PL must have been 3,000,000; as it's stated he's stronger than Pui Pui but barely challenges Goku even before he goes SSJ.