So while me and my wife were driving home tonight, we were talking about World of Warcraft. Through various tangents, we arrived at the question of: "Exactly how big is Azeroth?"
Well, we set off to measure it.
We started out in Westfall at a specific tree and used a 40yard range spell to measure the distance from me (at the tree) to her. Then I moved 40 yards beyond her in a straight line from the tree. We reached a benchmark of 200 yards from the tree. I returned to the tree, mounted, and flew towards her in a straight line which took exactly 8 seconds. So, while flying I move at 200yards/8sec = 25 yards per sec.
For those of you curious, I fly a 280% speed mount. As a side note, using this data we determined 280% flying mounts move at approx 51.13 miles per hour. (25yards = 75 feet. 75 x 60sec = 4500 feet per minute. 4500 x 60 min = 270,000 feet per hour. 270,00 / 5280 = 51.13 miles per hour.)
So, taking this another step further, I again mounted up at the Westfall tree and rose straight into the air. I flew off in a level straight line for 76 seconds. 76 sec x 75 ft/s = 5700 feet flown in 76 seconds. 5700 ft = 1.079 miles = 1.738 kilometers.
I then measured this distance out (from the tree to my stopping point) with the fullscreen map of the Eastern Kingdoms. It was 1.8 cm.
To determine the scale, I did:
1.738km = 1.8cm
1.738/9 = .19311 kilometers
.19311 x 5 = .965 Kilometers or, 965 meters.
1 cm = 965 meters. Approx.
Then I measured out the distance from Booty Bay to the northern tip of Eversong Woods on the same map and determined it to be 20 cm exactly. So, Eastern Kingdoms at it's longest is 965 meters x 20 = ~19.31 kilometers. (Or 11.9994 miles)
Taking that measurement with me to the Halls of Lightning, I checked out the holographic globe of Azeroth (just prior to the area with Loken). According to that globe, which I assumed to be "real time" (Titan technology), Eastern Kingdoms (at it's longest) could circle the globe just about 2.5 - 3 times along the equator. While only an estimation, holding Titan technology to be fairly accurate, I would venture to say the World of Azeroth is roughly 50-60 kilometers in diameter. Approx.
--Size of Kalimdor:
"Ok, Kalimdor clocks in at 19.8cm from the northern tip of Winterspring to the southern end of Uldum. Roughly 19.107 km. Or, measuring from Teldrassil (again, northern tip) to Uldum: 21.8 cm. Roughly 21.037 km."
---Map Scale Determination:
"Just to clarify, I broke down my original measurement of 1.8cm into 1/5th of a cm then multiplied it by 5 to give me the number of meters in 1 cm. This part seemed to throw some people." :(
"I used the current map as of 4.0.3a. Assuming there are no longer any areas we cannot access since flight was introduced (excluding instances. Instances change size once you enter them), everything should now have the same scale regardless of whether you're flying through a city or not (For example, Westfall could not be twice as large as it is now without also doubling its' representation on the map. 1cm in Westfall cannot equal any number other than ~965 meters). If I was able to ascertain a scale anywhere on the world map, all other areas should have an identical scale."
--For the "scale world" people:
"Another thing to mention: If Azeroth were on scale in size to the size of Earth. It would take roughly 487.02 hours to circle it once on a 280% speed mount (51.13 miles per hour). Or 20.29 days."