Beginning of Dragonball Z
Radditz vs. Farmer
Radditz: 1,200 Farmer with Shotgun: 5
Raditz vs. Goku and Piccolo
Radditz: 1,500
Piccolo (with weighted clothing) : 322
Piccolo (without weighted clothing) : 408
Piccolo's Makankosappo (1st Try) : 1,330
Piccolo's Makankosappo (2nd Try) : 1,440
Goku (with weighted clothing) : 330
Goku (without weighted clothing) : 416
Goku (with Kamehameha) : 924
Gohan: 1 to 1,307

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
Ozouru Vegeta: 180,000
Ozouru Gohan: 28,000

Gohan and Krillin vs. Frieza's Homies
Gohan: 14,000
Krillin: 13,000
Frieza's Thugs: < 10,000

At this point, Frieza's homies have an extremely low level. This is true because Gohan and Krillin kill them in under five seconds! *laughs at the pitiful power levels*

Vegeta vs. Kui
Vegeta: 24,000
Vegeta: 26,000
Kui: 18,000

Vegeta vs. Dudoria
Vegeta: 24,000
Vegeta: 26,000
Dudoria: 21,000

Vegeta vs. Zarbon (1st time)
Vegeta: 24,000
Vegeta: 26,000
Zarbon: 23,000
Zarbon (Transformed): 33,000

Vegeta vs. Zarbon (2nd time)
Vegeta: 48,000
Zarbon: 23,000
Zarbon (Monster): 33,000

Vegeta, Gohan, Krillin vs. Ginyu Force
Krillin: 30,000
Gohan: 50,000
Vegeta: 48,000
Goldar: 10,000
Recoome: 65,000

Goku vs. Ginyu Force
Goku: 180,000
Jeice: 75,000
Burter: 70,000
Recoome: 65,000
Ginyu: 120,000

Plain and simple Goku kicks the Ginyu force's ass.

Goku in Ginyu's Body Ginyu in Goku's Body
Vegeta: 138,000
Krillin: 60,000
Gohan: 100,000

Nail vs. Frieza / Vegeta vs. Frieza (1st Time)
Nail: 42,000
Vegeta: 138,000
Frieza (form 1): 530,000
Frieza (form 2): 1,000,000

Piccolo vs. Frieza
Piccolo (merged with Nail): 800,000
Frieza (form 2): 1,000,000
Frieza (form 3): 6,000,000

Vegeta vs. Frieza (2nd Time)
Vegeta: 400,000
Frieza (form 4): 12,000,000

At this point, Vegeta is a little bit Crazy. Vegeta thinks he's a Super Saiyan. Also, Frieza is only using a fraction of his full power, as he did when batteling Piccolo and Goku.

Goku vs. Frieza
Frieza (form 4):12,000,000
Goku: 300,000
Goku Kaioken x10: 3,000,000
Goku Kaioken x20: 6,000,000
Super Saiyan Goku:15,000,000
Frieza was using 50% of his power while fighting Goku. That is, until Goku goes Super Saiyan. Even at 100% power, Freeza is no match for Super Saiyan Goku.

Future Trunks vs. Cyborg Frieza and King Cold
SSJ Goku: 40,000,000
King Cold: 30,000,000
Cyborg Frieza : 25,000,000
Trunks: 35,000,000

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 fused): 60,000,000
Cell (absorbing Android 17): 180,000,000
Vegeta ( spirit of time training): 110,000,000
Trunks (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