I like to record everything they said regarding a character' feats. Strength & speed both verbally & in the black boxes, writing down every notable number. Sometimes they don't give a exact number but we can calculate the value with the information they gave (such with Omni-Man's Texas sized asteroid, which is worth 62.8 Exatons by their logic). However when I was doing this, I noticed that their numbers don't match with what they specifically said. Maybe it's a good, maybe it's a rounding, it depends. But for Dragon Ball's and the size of their universe, the number they gave is almost never on par with the values they give us to calculate:

Beerus vs Sailor Galaxia: the first episode to deal with the Universal shockwaves. According to this episode, the universe is 9x larger than our own and Beerus's speed is 242.33 quadrillion x Light Speed. But they explicitly write onsceeen that the universe is 1.62 octillion meters in radius, so if we divide that by the 7 seconds it took for the shockwaves to reach the edge of the universe, then Beerus would be 771.96 quadrillion times Light Speed, 2.1x faster than Galaxia, and the universe would be nearly 50 (49.9) times larger than our own, not 9. Now if we used the stated speed and the timeframe, the universe isn't even 2x the size of our own. For DB's to be 9x larger, it would need a a radius of 9.15e26 meters in radius/1.83 octillion meters in diameter, and a speed of 436.13 Quadrillion x Light Speed for the 7 seconds it took to reach the edge, still faster than Sailor Galaxia 

Thor vs Vegeta: Supposedly, Vegeta with the multipliers (50x,20x,20x) is nearly 300 Quintillion x Light Speed. But you can clearly see it's only 277 Quadrillion onscreen, they missed a extra set of zeros. Now using the numbers from Beerus/Broly, Vegata would actually be 4.85 sextillion x Light Speed. But we can go further. Using the stated diameter for DB's universe, Vegata would be 15.44 sextillion x Light Speed, or using the 13.29x larger than our universe, claim from this very episode, 9.93 sextillion x Light Speed. Either way, his speed was heavily downplayed (though still less than Plank instant Thor)

Ben 10 vs Green Lantern & Lex Luthor vs Doctor Doom: Both use the same speed feat of Green Lanterns traveling across the DC universe in a hour, which they noted is 100 trillion light years wide. For some reason, Hal and Lex were given different values, Hal's 1.5 quintillion x Light Speed, while Lex's 5 Quintillion, but what matters is that neither of those are true. It's actually 876.6 quadrillion, making Lex 3.6x slower than Doom (3.136 quintillion x Light Speed), not 2.5x faster (Hal is still 125x faster than Ben 10).

Trunks vs Silver: Trunks is 29.9 quintillion x Light Speed according to this episode via scaling to Goku trip across Hell. But using the distance given of 718 septillion meters over 32 seconds only give 74.84 quadrillion times Light Speed. For the 29.9 quintillion figure make sense, it would have to be nearly 600 octillion meters wide and 277 million x larger than our own universe: 

Goku vs Superman: The updated calc for this episode place DB's universe at 1,505x larger than our own. However there are some problems: 1) with the volume given of 6.0202265e83 cubic meters, it would actually be 1,687x larger than our own. 2)Heaven is not the size of our universe with the diameter given, it's only about 1/48 of our universe's diameter. 3) Using our real life universe as Heaven's size, Dragon Ball's universe would actually be 23.53 million x larger than our own, with a diameter of 252 octillion meters. For Superman, the DC universe would actual be 56.80368 nonillion light years in radius, and 1.82 vigintillion x larger than our own.

Conclusion: I just wanted to say things about some oddities.

Dragon Ball, Marvel, and DC: How Death Battle ducked up their universes