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The Double Decker Bus Calculator: About


13th July 2006: Areas, Lengths, Speeds and Heights calculators up and running

Assumptions & Clarifications

The figures that I have used for this calculator have come from many sources, and are as accurate as I think they possibly could be. Of course, there may be glaring errors - if you spot any, contact me and I shall correct them.

The calculator works by converting every inputted number into a standardised unit (such as metres or square kilometres) and converting this result into the specified output format. Due to the nature of some of the objects measured, a number of assumptions and clarifications need to be made:


Double Decker Bus (8.382m): There are many different types of double decker buses, of varying height and length. To get around this obstacle, the archetypal double decker bus - the London Routemaster shall be used. From the Routemaster Association website, the height of the Routemaster RM model (1958-1965) is given in yards, but has been converted into metric using Google.

Association football pitch (105.156m): The size of football pitches varies wildly. According to the official FIFA laws of the game (cited here and here), the length of a football pitch must be between 100 and 130 yards. Therefore, the average measurement (and the measurement used for this calculator) is 115 yards. Bear in mind that very few pitches are actually this long.

Cricket pitch (20.12m): The distance from stump to stump, converted into metric using Google. Of course, the whole cricket field is much larger and wildly variable. (Source: ABC of Cricket)

American football field (109.728m): Standard length, converted into metric using Google. (Source: Wikipedia)

Land's End To John O'Groats (968825.088m): As the crow flies. Needless to say, it would be a bit longer by foot. (Source: Wild About Britain)

Earth To The Moon (384403000m): The current average length, not taking into account any eccentricity in the Moon's orbit. This is likely to change over time, but not significantly enough to be discernable in the near future. (Source: Wikipedia)

The Equator (40075000m): An approximation, not taking into account any mountain ranges. (Source: Wikipedia)

Blue Whales (30m): The estimated length that male blue whales can grow up to. (Source: Wikipedia)

The Nile (6995000m): The length of the longer White Nile from its source to the mouth. (Source: M. Barron)


Wales (20779 km2:) Estimated. (Source: Wikipedia)

Manhattan Island (51.8 km2:) Estimated. (Source: Wikipedia)

Association football pitch (0.007211598 km2:) Again, using the sources cited above, the average size of a pitch was calculated. Note that I am using "Association football pitch" instead of "football" or "soccer" - this is partly to remove confusion between American and Association football, but mainly because I can't stand the term "Soccer".

Isle Of Man (572 km2:) Estimated. (Source: Wikipedia)

Isle Of Wight (380 km2:) Estimated. (Source: Wikipedia)

London (20779 km2:) Estimated, using the confines of Greater London as opposed to the City of London, which in any case is referred to as the "square mile" - you can figure it out. (Source: Wikipedia)

The UK (244820 km2:) Estimated, and very approximate due to the complex nature and political status of the United Kindgom. (Source: Wikipedia)

Australia (7686850 km2:) Estimated. (Source: Wikipedia)


Cheetah (103 km/h): Highest recorded speed. (Source: Wikipedia)

Concorde (2170 km/h): Average cruising speed at an altitude of 16765m. (Source: Wikipedia)

Snail (0.01008 km/h): Highest recorded speed of a "racing" garden snail, as recorded by "Archie" the snail at the 1995 World Snail Racing Championships. (Source: Guinness Book of Records, as cited in Hyper Textbook)

Man (36.89 km/h): The average speed over 100m achieved by Justin Gatlin and Asafa Powell during their record-breaking achivements. (Source: Wikipedia)

Tortoise (0.37 km/h): The fastest walking speed of a tortoise ever recorded. Understandably, the swimming speed of the tortoise may be greater. (Sources: Wikipedia; Guinness Book of Records, as cited in Hypertextbook)

Formula One Car (413.205 km/h): The highest recorded speed of a specially-modified low downforce BAR-Honda F1 car with an old-style V10 engine, set before their Bonneville 400 attempt. (Source: Wikipedia)

Sound (1225.044 km/h): Speed at sea level through dry air (Source: Google)

Light (107925285 km/h): Speed through vacuum, approximate (Source: Google)


Empire State Building (381m): Height excluding mast - with the mast, the height would be 449m. (Source: Emporis)

Statue Of Liberty (46.5m): Height from base of statue to tip of torch, excluding the concrete pedestal on which it resides. (Source: Emporis)

Canary Wharf (235m): Actually the height of 1 Canada Square, the most prominent and famous building in the area of Canary Wharf. (Source: Emporis)

Nelson's Column (55m): Height of column and statue itself. The statue is 5.5m tall. (Source: Wikipedia)

Mount Everest (8848m): Height above sea level, as accepted by the government of Nepal. A team from the United States equipped with advanced GPS receivers measured the height of Mount Everest at 8850m, and many other expeditions have come back with alternative heights. The height used by Nepal appears to be the most commonly accepted, and hence has been used here. (Source: Wikipedia)

Double Decker Bus (4.3185m): As above, the height of the London RM Routemaster was used to represent all double decker buses.

Man (1.75m): This is the average height of a North American male human, as given by Wikipedia. While of course far from representative of the human race as a whole, it provides a useful generic figure for the purpose of this calculator. In fact, I would dearly appreciate more accurate findings for the average height of mankind as a whole.

Great Pyramid of Giza (138.75m): The current height of the pyramid, having taken into account erosion and the theft of the pyramidion. The origina height of the pyramid was closer to 146.5m. (Source: Wikipedia)

Leaning Tower of Pisa (56.7m): The current height from the ground to the top-most part of the highest side of the tower. (Source: Wikipedia)

Burj Dubai (810m): This is the estimated height of the not-yet-completed tower which, if built, will be the tallest structure ever constructed, including stayed radio masts. As soon as the tower has been completed and the height has been confirmed, this shall be changed accordingly. (Source: Wikipedia)

The BT Tower (188m): Height including top-most aerial. (Source: Wikipedia)

Challenger Deep (10911m): Yes, I know that no-one ever says "That was twice the height of two Challenger Deeps" or similar. This is only here so that when people say "as deep as the ocean", a definite answer can be given for how deep the ocean is. The Challenger Deep is the lowest recorded point of the ocean. (Source: Wikipedia)


No corrections have been sent in as of yet.


If at any time you get a message similar to the following: 1 square inch is equivalent to 0 Australias (to six decimal places).; an error has not occured - this has happened because the amount of Australias in a square inch is sooooooo small that it won't register with only six decimal places. If you really want to know, use the figures provided on this page and Google.

Above, the measurement of the Statue of Liberty is without that of its pedestal, while Nelson's Column includes the column height. While apparently contradictory, this is because the name "Statue of Liberty" refers to the statue itself (and not the pedestal), whereas the name "Nelson's Column" includes the column.

I know how inaccurate Wikipedia is purported to be. I also have faith in the Úlite band of pedants that keep it up and running. Again, if you can find any more accurate figures from non-Wiki sources, contact me.

If you want to nick this code or any part of it, go ahead. Just credit me in some way or send me an e-mail.

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