Power Levels

Beginning of DragonBallZ

Raditz vs. Farmer

Radditz: 1,200
Farmer with Shotgun: 5

Raditz vs. Goku and Piccolo

Radditz: 1,500
Piccolo with weighted clothing: 322
Piccolo: 408
Piccolo w/ Makkan Sappo (Special Beam Cannon) 1st Try: 1,330
Piccolo w/ Makkan Sappo (Special Beam Cannon) 2nd Try: 1,440
Goku (with weighted clothing): 330
Goku (without weighted clothing): 416
Goku (with Kamehameha): 924
Gohan: 1 to 1,307 (his power changes with his emotions)

After the Battle (Search for Tien and Chaouzu)

Roshi: 139
Roshi's Turtle: 0.001
Krillin: 206
Tien: 250
Yamucha: 177
Chaozu: 145

Z Fighters vs. Sybamen and Napa

Saibamen: 1,200
Yamcha: 1,480
Krillin: 1,083
Krillin: 1,750
Tienshinhan: 1,830
Chaozu: 610
Piccolo: 1,220
Piccolo: 3,500
Gohan: 981
Gohan: 2,800

Goku vs. Vegeta and Napa

Goku: 8,000
9,000 kaioken x1
16,000 kaioken x2
24,000 kaioken x3
32,000 kaioken x4
Nappa: 4,000
Vegeta: 18,000

Gohan and Krillin vs. Feeza's Thugs

Gohan: 14,000
Krillin: 13,000
Freeza's Thugs: < 10,000

Vegeta vs. Kui

Vegeta: 24,000
Kui: 18,000

Vegeta vs. Dudoria

Vegeta: 30,000+
Dudoria: 21,000

Vegeta vs. Zarbon (1st time)

Vegeta: 30,000+
Zarbon: 25,000
Zarbon (Monster): 33,000

Vegeta vs. Zarbon (2nd time)

Vegeta: 35,000
Zarbon: 25,000
Zarbon (Monster): 33,000

Vegeta, Gohan, Krillin vs. Ginyu Force

Krillin (after Guru power up): 18,000
Gohan (after Guru power up): 22,000
Vegeta: 35,000
Goldo: 10,000
Recoome: 40,000

Goku vs. Ginyu Force

Goku (while fighting Ginyu): 180,000
Jeice (its NOT Chase People!!): 45,000
Burter: 45,000
Recoome: 40,000
Ginyu: 120,000
Ginyu in Goku's Body: 23,000

Goku in Ginyu vs. Ginyu in Goku

Ginyu in Goku's Body: 23,000
Vegeta: 500,000

Nail vs. Freeza / Vegeta vs. Freeza (1st Time)

Nail: 42,000
Vegeta: 500,000
Freeza (form 1): 530,000
Freeza (form 2): 1,000,000

Piccolo vs. Freeza

Piccolo (merged w/Nail): 800,000
Freeza (form 2): 1,000,000
Freeza (form 3): 6,000,000

Vegeta vs. Freeza (2nd Time)

Vegeta: 1,000,000
Freeza (form 4): 12,000,000

Goku vs. Freeza

Freeza (form 4): 12,000,000
Goku: 300,000
SSJ Goku: 15,000,000

Future Trunks vs. Freeza Bot and King Cold

SSJ Goku: 40,000,000
King Cold: 30,000,000
Freeza Bot: 25,000,000
Trunks: 35,000,000


END OF NEW LIST

ALL LEVELS AFTER THIS POINT ARE A GUESS!!!!! 
Toriyama NEVER listed any levels after this point.

The Cell Saga

SSJ Goku (not sick): < 45,000,000
SSJ Trunks: 45,000,000
SSJ Vegeta: 47,000,000
Piccolo: 20,000,000
Gohan: 15,000,000
Android 16: 65,000,000
Android 17: 60,000,000
Android 18: 60,000,000
Android 19: 10,000,000
Android 20: 5,000,000
Cell: 65,000,000
Kamicolo (Piccolo & Kami combined): 60,000,000
Cell (after absorbing Android 17): 180,000,000
Vegeta (after spirit of time training): 110,000,000
Trunks (after spirit of time training): 150,000,000
Perfect Cell (after absorbing 17 & 18): 250,000,000

Cell Game

Piccolo: 160,000,000
Vegeta: 170,000,000
Trunks: 175,000,000
SSJ Gohan: 95,000,000
SSJ Goku: 250,000,000
SSJ2 Gohan: 270,000,000
Super Perfect Cell: 270,000,000

The Buu Saga (7 years later)

Piccolo: 280,000,000
Gohan: 290,000,000
Vegeta: 340,000,000
Goku: 340,500,000
Chibi Trunks: 140,000,000
Goten: 135,000,000
Android 18: 110,000,000
Kaioshin: 170,000,000
Kibit: 160,000,000
Yam: 300,000,000
Supopo: 300,000,000
Dabura: 330,000,000
Buu: 380,000,000
Vegeta (max): 360,000,000
SSJ3 Goku: 375,000,000
Evil Buu: 390,000,000
Gotenks: 290,000,000
SSJ Gotenks: 380,000,000
SSJ3 Gotenks: 410,000,000
Majin Buu + Gotenks & Piccolo: 420,000,000
Gohan's Zet sword: 360,000,000
Kaioshin Gohan: 430,000,000
Buu +Piccolo, Trunks, Goten & Gohan: 450,000,000
Vegetto: 500,000,000
Super Buu: 455,000,000


END OF DRAGON BALL Z