In HtTYD, many dragons have official statistics that can be used to compare one dragon to another. The Skrill is a dragon capable of channeling lightning & travelling through the sky as a lightning bolt. When doing this, the Skrill has a speed stat of 19. Comparing each dragon's speed stat to this, & using their official weights, I'm going to find kinetic energy for each of them.
Note 1: Not all dragons have a confirmed speed &/or weight. These dragons will be left blanked out.
Note 2: There are a lot of inconsistencies with size & weight in HtTYD, so if something seems wrong, that might be why.
Note 3: There are a few dragons that physically run down foes/obstacles in the show, so I figured kinetic energy would be fine to use for all of them. If you disagree with any of this, please let me know.
Note 4: If you see any "reserved spots", it's for more complicated calcs that I may or may not do at any point.
Note 5: Some stats are exclusive to the games, which may cause inconsistencies.
Note 6: I'm not against using a case-by-case basis for any of these. Some dragons probably shouldn't scale to their KE, while others shouldn't scale to particular dragons. Let me know what you think & I'll see what should be done.
Note 7: If you have any other questions, concerns, or suggestions, please let me know in the comments.
Armorwing[]
Speed=7/19=0.4 times the speed of lightning
4.4e5*0.4=176000m/s
Weight=1089kg
1089*0.5*176000^2=1.7e13 Joules, Small Town level+
Attack=12
Speed=7
Armor=50
Firepower=10
Bewilderbeast[]
Speed=6/19=0.3 times the speed of lightning
4.4e5*0.3=132000m/s
Weight=90719kg
90719*0.5*132000^2=8e14 Joules, Large Town level
Using swimming speed
Speed=18/19=0.9 times the speed of lightning
4.4e5*0.9=396000m/s
90719*0.5*396000^2=7.1e15 Joules, Small City level
Attack=50
Speed=6 (on land), 18 (underwater)
Armor=38
Firepower=60
Boneknapper[]
Weight is unknown, so I'll skip this one
Attack=7
Speed=10
Armor=2 (18 with bone armor)
Firepower=9
Buffalord[]
Speed=6/19=0.3 times the speed of lightning
4.4e5*0.3=132000m/s
Weight=431kg
431*0.5*132000^2=4e12 Joules, Multi-City Block level+
Attack=8
Speed=6
Armor=16
Firepower=12
Catastrophic Quaken[]
Speed=14/19=0.7 times the speed of lightning
4.4e5*0.7=308000m/s
Weight=1134kg
1134*0.5*308000^2=5.4e13 Joules, Town level
Attack=12
Speed=14
Armor=35
Firepower=10
Cavern Crasher[]
Speed=18/19=0.9
4.4e5*0.9=396000m/s
Weight=454kg
454*0.5*396000^2=3.6e13 Joules, Town level
Attack=14
Speed=18
Armor=16
Firepower=20
Changewing[]
Speed=14/19=0.7 times the speed of lightning
4.4e5*0.7=308000m/s
Weight=431kg
431*0.5*308000^2=2e13 Joules, Small Town level+
Attack=9
Speed=14
Armor=1
Firepower=12
Crimson Goregutter[]
Speed=10/19=0.5 times the speed of lightning
4.4e5*0.5=220000m/s
Weight=1134kg
1134*0.5*220000^2=2.7e13 Joules, Town level
Bonus: According to "Deck of Dragons" in the 3rd movie, Goregutters weigh as much as 10 Night Furies.
Weight=8056kg
8056*0.5*220000^2=1.9e14 Joules, Town level
Attack=17
Speed=10
Armor=18
Firepower=12
Deadly Nadder[]
Speed=8/19=0.4 times the speed of lightning
4.4e5*0.4=176000m/s
Weight=1192kg
1192*0.5*176000^2=1.8e13 Joules, Small Town level+
Attack=10
Speed=8
Armor=16
Firepower=18
Death Song[]
Speed=17/19=0.9 times the speed of lightning
4.4e5*0.9=396000m/s
Weight=544.3kg
544.3*0.5*396000^2=4.3e13 Joules, Town level
Attack=16
Speed=17
Armor=16
Firepower=13
Deathgripper[]
Speed=12/19=0.6 times the speed of lightning
4.4e5*0.6=264000m/s
Weight=953kg
953*0.5*264000^2=3.3e13 Joules, Town level
Attack=27
Speed=12
Armor=20
Firepower=12
Devilish Dervish[]
No stats on this one
Dramillion[]
Speed=14/19=0.7 times the speed of lightning
4.4e5*0.7=308000m/s
Weight=272.2kg
272.2*0.5*308000^2=1.3e13 Joules, Small Town level+
(This spot reserved for Titan Wing Dramillion)
Attack=18
Speed=14
Armor=8
Firepower=20
Egg Biter[]
No stats on this one
Eruptodon[]
Speed=7/19=0.4
4.4e5*0.4=176000
Weight=1089
1089*0.5*176000^2=1.7e13 Joules, Small Town level+
Attack=9
Speed=7
Armor=36
Firepower=8
Fathomfin[]
No stats on this one
Fireworm[]
Speed=3/19=0.1 times the speed of lightning
4.4e5*0.1=44000m/s
Weight=0.3kg
0.3*0.5*44000^2=2.9e8 Joules, Small Building level
Attack=4
Speed=3
Armor=5
Firepower=30
Fireworm Queen[]
Speed=12/19=0.6 times the speed of lightning
4.4e5*0.6=264000m/s
Weight=2778kg
2778*0.5*264000^2=9.7e13 Joules, Town level
Attack=16
Speed=12
Armor=15
Firepower=19
Flame Whipper[]
No stats on this one
Flightmare[]
Speed=8/19=0.4 times the speed of lightning
4.4e5*0.4=176000m/s
Weight=272.2kg
272.2*0.5*176000^2=4.2e12 Joules, Small Town level
Attack=10
Speed=8
Armor=4
Firepower=7
Foreverwing[]
No stats on this one
Gobsucker[]
No stats on this one
Grapple Grounder[]
No stats on this one
Green Death[]
Same as Red Death
Grim Gnasher[]
Speed=12/19=0.6
4.4e5*0.6=264000
Weight=181.4
181.4*.5*264000^2=6.3e12 Joules, Small Town level
Attack=10
Speed=12
Armor=7
Firepower=9
Groncicle[]
No stats
Gronckle[]
Speed=4/19=0.2 times the speed of lightning
4.4e5*0.2=88000m/s
Weight=2596kg
2596*0.5*88000^2=1e13 Joules, Small Town level
Attack=8
Speed=4
Armor=20
Firepower=14
Hackatoo[]
No stats
Hideous Zippleback[]
Speed=10/19=0.5 times the speed of lightning
4.4e5*0.5=220000m/s
Weight=2738kg
2738*0.5*220000^2=6.6e13 Joules, Town level
Attack=12
Speed=10
Armor=10
Firepower=14
Hobblegrunt[]
Speed=4/19=0.2
4.4e5*0.2=88000
Weight=2024.4
2024.4*0.5*88000^2=7.8e12 Joules, Small Town level
Attack=18
Speed=4
Armor=16
Firepower=18
Hobgobbler[]
Speed=8/19=0.4
4.4e5*0.4=176000
Weight=25
25*0.5*176000^2=3.9e11 Joules, City Block level+
Attack=8
Speed=8
Armor=4
Firepower=6
Hotburple[]
Speed=4/19=0.2
4.4e5*0.2=88000
Weight=2596.4
2596.4*0.5*88000^2=1e13 Joules, Small Town level
Attack=8
Speed=4
Armor=20
Firepower=14
Large Shadow[]
Speed=14/19=0.7
4.4e5*.7=308000
Weight=726
726*0.5*308000^2=3.4e13 Joules, Town level
Attack=25
Speed=14
Armor=15
Firepower=18
Light Fury[]
Speed=20/19=1.1
4.4e5*1.1=484000
Weight=726
726*0.5*484000^2=8.5e13 Joules, Town level
Attack=15
Speed=20
Armor=18
Firepower=14
Luminous Krayfin[]
No stats
Moldruffle[]
No stats
Monstrous Nightmare[]
Speed=16/19=0.8 times the speed of lightning
4.4e5*0.8=352000m/s
Weight=2291kg
2291*0.5*352000^2=1.4e14 Joules, Town level
Attack=15
Speed=16
Armor=12
Firepower=15
Mudraker[]
No stats
Night Fury[]
Speed=20/19=1.1 times the speed of lightning
4.4e5*1.1=484000m/s
Weight=806kg
806*0.5*484000^2=9.4e13 Joules, Town level
Attack=15
Speed=20
Armor=18
Firepower=14
Night Terror[]
Speed=6/19=0.3 times the speed of lightning
4.4e5*0.3=132000m/s
Weight=6.35kg
6.35*0.5*132000^2=5.5e10, City Block level
^KE probably doesn't apply to this one though^
Attack=6
Speed=6
Armor=4
Firepower=10
Prickleboggle[]
No stats
Purple Death[]
No stats, likely scales to Red Death
Raincutter[]
Speed=8/19=0.4
4.4e5*0.4=176000
Weight=953
953*0.5*176000^2=1.5e13 Joules, Small Town level+
Attack=8
Speed=8
Armor=6
Firepower=12
Razorwhip[]
Speed=18/19=0.9
4.4e5*0.9=396000m/s
Weight=408.2kg
408.2*0.5*396000^2=3.2e13 Joules, Town level
Attack=18
Speed=18
Armor=32
Firepower=12
Red Death[]
Speed=7/19=0.4 times the speed of lightning
4.4e5*0.4=176000m/s
Weight=9979kg
9979*0.5*176000^2=1.5e14 Joules, Town level
Attack=28
Speed=7
Armor=30
Firepower=27
Rumblehorn[]
Speed=7/19=0.4 times the speed of lightning
4.4e5*0.4=176000m/s
Weight=495kg
495*0.5*176000^2=7.7e12 Joules, Small Town level
Attack=11
Speed=7
Armor=12
Firepower=11 (or 22)
Sand Wraith[]
No stats
Sandbuster[]
Speed=11/19=0.6
4.4e5*0.6=264000
Weight=454
454*0.5*264000^2=1.6e13 Joules, Small Town level+
Attack=13
Speed=11
Armor=8
Firepower=10
Scauldron[]
Speed=6/19=0.3 times the speed of lightning
4.4e5*0.3=132000m/s
Weight=1361kg
1361*0.5*132000^2=1.1e13 Joules, Small Town level
Bonus: I did a rough calc & found that a Scauldron can hold about 140000kg of water at max
140000*0.5*132000^2=1.2e15 Joules, Large Town level
Attack=10
Speed=6
Armor=6
Firepower=14
Screaming Death[]
Speed=8/19=0.4 times the speed of lightning
4.4e5*0.4=176000m/s
Weight=1134kg
1134*0.5*176000^2=1.7e13 Joules, Small Town level+
Bonus: Using the weight I calced for SD in a different calc (I'll post that at some point).
Weight=72719kg
72719*0.5*176000^2=1.1e15 Joules, Large Town level
Attack=16
Speed=8
Armor=20
Firepower=10
Scuttleclaw[]
Speed=16/19=0.8
4.4e5*0.8=352000
Weight=272.2
272.2*.5*352000^2=1.7e13 Joules, Small Town level
Attack=10
Speed=16
Armor=8
Firepower=10
Seashocker[]
Speed=16/19=0.8 times the speed of lightning
4.4e5*0.8=352000m/s
Weight=1000kg
1000*0.5*352000^2=6.2e13 Joules, Town level
Attack=18
Speed=16
Armor=20
Firepower=7
Sentinel[]
Speed=8/19=0.4
4.4e5*0.4=176000
Weight=544.3
544.3*0.5*176000^2=8.4e12 Joules, Small Town level
Attack=12
Speed=8
Armor=15
Firepower=6
Shellfire[]
Speed=14/19=0.7
4.4e5*0.7=308000
Weight=3447.3
3447.3*0.5*308000^2=1.6e14 Joules, Town level
Attack=20
Speed=14
Armor=16
Firepower=22
Shivertooth[]
No stats
Shockjaw[]
No stats
Shovelhelm[]
Speed=5/19=0.3
4.4e5*0.3=132000
Weight=1588
1588*0.5*132000^2=1.4e13 Joules, Small Town level
Attack=10
Speed=5
Armor=20
Firepower=10
Silkspanner[]
No stats
Silver Phantom[]
No stats
Singetail[]
Speed=15/19=0.8 times the speed of lightning
4.4e5*0.8=352000m/s
Weight=816.4kg
816.4*0.5*352000^2=5.1e13 Joules, Town level
Attack=17
Speed=15
Armor=15
Firepower=20
Skrill[]
Speed=11/19=0.6 times the speed of lightning
4.4e5*0.6=264000m/s
Weight=816kg
816*0.5*264000^2=2.8e13 Joules, Town level
Bonus: Using the speed of lightning
816*0.5*440000^2=7.9e13 Joules, Town level
Attack=14
Speed=11/19
Armor=10
Firepower=12
Sliquifier[]
No stats
Slithersong[]
No stats, likely comparable to Death Songs
Slitherwing[]
Speed=18/19=0.9
4.4e5*0.9=396000
Weight=454
454*0.5*396000^2=3.6e13 Joules, Town level
Attack=14
Speed=18
Armor=13
Firepower=0
Small Shadow[]
Speed=14/19=0.7
4.4e5*0.7=308000
Weight=6.4
3.2*308000^2=3e11 Joules, City Block level+
Small Shadow's stats are said to be equal to a Large Shadow, but that's obviously contradictory, so I won't bother listing stats. On the other hand, I see little reason for the Small Shadows not to have comparable speed to the Large Shadows, so I used the speed anyways.
Smothering Smokebreath[]
Speed=8/19=0.4 times the speed of lightning
4.4e5*0.4=176000m/s
Weight=64kg
64*0.5*176000^2=9.9e11 Joules, Multi-City Block level
Attack=6
Speed=8
Armor=6
Firepower=6
Snafflefang[]
Speed=5/19=0.3
4.4e5*0.3=132000
Weight=1276.4
1276.4*0.5*132000^2=1.1e13 Joules, Small Town level
Attack=9
Speed=5
Armor=17
Firepower=13
Snaptrapper[]
Speed=4/19=0.2
4.4e5*0.2=88000
Weight=2631
2631*0.5*88000^2=1e13 Joules, Small Town level
Attack=10
Speed=4
Armor=4
Firepower=6
Snifflehunch[]
No stats
Snow Wraith[]
Speed=18/19=0.9 times the speed of lightning
4.4e5*0.9=396000m/s
Weight=408.2kg
408.2*0.5*396000^2=3.2e13 Joules, Town level
Attack=18
Speed=18
Armor=22
Firepower=24
Speed Stinger[]
Speed=30/19=1.6 times the speed of lightning
4.4e5*1.6=704000m/s
Weight=272kg
272*0.5*704000^2=6.7e13 Joules, Town level
Attack=12
Speed=30
Armor=10
Firepower=0
Stormcutter[]
Speed=17/19=0.9 times the speed of lightning
4.4e5*0.9=396000m/s
Weight=1134kg
1134*0.5*396000^2=8.9e13 Joules, Town level
Attack=10
Speed=17
Armor=4
Firepower=12
Submaripper[]
Speed=16/19=0.8
4.4e5*0.8=352000
Weight=1633 (<This is the "official" weight. However, based on inconsistencies, I've deemed this innacurate)
1633*0.5*352000^2=1e14 Joules, Town level
(This space reserved for accurate Submaripper calc)
Attack=20
Speed=16
Armor=14
Firepower=0
Sweet Death[]
No stats
Sword Stealer[]
No stats
Terrible Terror[]
Speed=10/19=0.5 times the speed of lightning
4.4e5*0.5=220000m/s
Weight=9kg
9*0.5*220000^2=2.2e11 Joules, City Block level
Attack=8
Speed=10
Armor=6
Firepower=12
Thornridge[]
No stats
Threadtail[]
Speed=6/19=0.3
4.4e5*0.3=132000
Weight=862
431*132000^2=7.5e12 Joules, Small Town level
Attack=14
Speed=6
Armor=3
Firepower=10
Thunderclaw[]
Speed=16/19=0.8
4.4e5*0.8=352000
Weight=569.3
569.3*0.5*352000^2=3.7e13 Joules, Town level
Thunderdrum[]
Speed=14/19=0.7 times the speed of lightning
4.4e5*0.7=308000m/s
Weight=408kg
408*0.5*308000^2=1.9e13 Joules, Small Town level+
Attack=12
Speed=14
Armor=10
Firepower=16
Thunderpede[]
No stats
Tide Glider[]
No stats
Timberjack[]
Speed=12/19=0.6
4.4e5*0.6=264000
Weight=408.2
204*264000^2=1.4e13 Joules, Small Town level
Attack=10
Speed=12
Armor=8
Firepower=10
Triple Stryke[]
Speed=20/19=1.1
4.4e5*1.1=484000
Weight=408.2
204.1*484000^2=4.8e13 Joules, Town level
Attack=15
Speed=20
Armor=18
Firepower=14
Typhoomerang[]
Weight is unknown, so I'll skip this one
Attack=14
Speed=20
Armor=12
Firepower=17
Whispering Death[]
Speed=7/19=0.4 times the speed of lightning
4.4e5*0.4=176000m/s
Weight=907kg
907*0.5*176000^2=1.4e13 Joules, Small Town level
Attack=8
Speed=7
Armor=7
Firepower=3
Windgnasher[]
Speed=16/19=0.8
4.4e5*0.8=352000
Weight=907.2
907.2*0.5*352000^2=5.6e13 Joules, Town level
Attack=14
Speed=16
Armor=18
Firepower=9
Windstriker[]
No stats
Windwalker[]
No stats
Woolly Howl[]
No stats