Dragonball

Quest for the Dragonballs

Goku: 10
Goku Oozaru: 100

21st Tenkaichi Budokai

Kuririn: 97
Bacteria: 14 (his strength is his stench)
Yamcha: 73
Master Roshi: 139 (his strength never changes in the entire manga)
Nam: 87
Lanfan: 14
Guilan: 71
Goku: 124
Against Tao Paī Paī
Tao Paī Paī: 146
Karin:169
Goku: (after Karin training): 157
Old Son Gohan: 156

22nd Tenkaichi Budokai

Jackie Chun (Kame-sennin): 139
Tenshinhan: 180
Yamcha: 128
Tsurusennin: 120
Wolf man: 19
Kuririn: 143
Chaozu: 138
Pam Put: 56
Goku: 180

Against Piccolo Daimaoh

Piccolo Daimao old: 201
Piccolo Daimaoh: 260
Yajirobe: 181
Tambourine: 173
Cymbal: 173
Goku: (after holy water) 265

23rd Tenkaichi Budokai

Tenshinhan: 250
Tao Paī Paī:189
Goku: 330
ChiChi: 73
Krillin: 206
Piccolo: 320
Yamcha: 167
Shen (Kami-Sama): 301

Dragonballz

Raditz Saga

Raditz: 1,200
Farmer withShotgun: 5
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) : 334
Goku (without weighted clothing) : 416
Goku (with Kamehameha) : 924
Gohan: 1 to 1,307 (power changes w/ emotions)
After the Battle
Kame-sennin: 139
Kame-sennin's turtle: 0.001
Krillin: 206
Tenshinhan: 250
Yamcha: 177
Piccolo: 329
Chaozu: 145

Vegeta Saga

Saibamen: 1,200
Yamcha: 1,480
Chaozu: 610
Tenshinhan: 1,830
Tien: Mega blast 2,900
Kuririn: 1,083
Krillin: Mega energy blast: 2,000 then split into 5x 1,400 blasts.
Piccolo: 1,222
Gohan: 981
Gohan: Masenko: 2,800
Gohan: healed: 2,800
Goku: 5,000
Goku Powered up: 8,000
Goku Kaioken x1: 12,000
Goku Kaioken x2: 16,000
Goku Kaioken x3: 24,000
Goku Kaioken x4: 32,000
Nappa: 4,000
Vegeta: 18,000
Oozaru Vegeta: 180,000
Oozaru Gohan: 28,000

Freeza Saga

Namek

Vegeta: 24,000
Kui: 20,000
Dodoria: 21,000
Namek fighters: 3,000
Zarbon: 23,000
Zarbon Monster: 33,000
Vegeta: 35,000
Krillin after Guru: 12,000
Gohan after Guru: 19,000
Gohan's Masenko: 21,000

Ginyu Force

Guldo: 10,000
Recoome: 40,000
Goku (Scouter): 5,000
Goku vs Jeese en Burter: bursts of 60,000
Goku: 180,000
Jeice: 50,000
Burter: 45,000
Ginyu: 120,000
Ginyu in Goku's Body: 23,000
Nail: 45,000

Freeza

Freeza (phase 1): 530,000
Vegeta: 300,000
Freeza (phase 2): 1,100,000
Freeza (phase 3): 2,500,000
Piccolo (fused with Nail): 800,000
Vegeta: 1,000,000
Freeza (phase 4 33%): 4,000,000
Freeza (phase 4 50%): 6,000,000
Freeza (phase 4 70%): 8,400,000
Freeza (phase 4 100%): 12,000,000
Goku after Ginyu fight: 300,000
Goku Kaioken x10: 3,000,000
Goku Kaioken x20: 6,000,000
Goku Genki Dama: 8,000,000
Super Saiya-jin Goku: 15,000,000
King Cold: 13,000,000
Freeza Bot: 12,500,000
Future Trunks (Scouter): 5
Super Saiya-jin Future Trunks: 17,000,000
Super Saiya-jin Goku: 20,000,000

Akira Toriyama (the creator of DB/DBZ) didn't release any power levels after the frieza saga.