1 decametre

A clickable mosaic of objects
at scales within direct human experience, from the micrometric (10^−6 m, top left) to the multi-kilometric (10⁵ m, bottom right).

A Blue whale has been measured as 33 metres long; this drawing compares its length to that of a human diver and a dolphin

To help compare different orders of magnitude this page lists lengths between 10 metres and 100 metres.

Distances shorter than 10 metres

Conversions

10 metres (very rarely termed a decametre which is abbreviated as dam) is equal to:

• 10 metres
• 100 decimetres
• 1,000 centimetres
• 10,000 millimetres
• 32.8 feet
• side of square with area 100 m²

Human-defined scales and structures

• 10 metres – wavelength of the highest shortwave radio frequency, 30 MHz
• 23 metres – height of the obelisk of the Place de la Concorde, Paris, France.
• 25 metres – wavelength of the broadcast radio shortwave band at 12 MHz
• 29 metres – height of the lighthouse at Savudrija, Slovenia.
• 31 metres – wavelength of the broadcast radio shortwave band at 9.7 MHz
• 34 metres – height of the Split Point Lighthouse in Aireys Inlet, Victoria, Australia.
• 40 metres – average depth beneath the seabed of the Channel tunnel
• 49 metres – wavelength of the broadcast radio shortwave band at 6.1 MHz
• 55 metres – height of the Leaning Tower of Pisa
• 60 metres – height of Pyramid of Djoser
• 64 metres – wingspan of a Boeing 747-400
• 70 metres – length of the Bayeux Tapestry
• 70 metres – width of a typical football field
• 88.40 metres – wingspan of the Antonov An-225 Mriya transport aircraft
• 100 metres – wavelength of the lowest shortwave radio frequency, 3 MHz

Sports

• 11 metres – approximate width of a doubles tennis court
• 15 metres – width of a standard FIBA basketball court
• 15.24 metres – width of an NBA basketball court (50 feet)
• 18.44 metres – distance between the front of the pitcher's rubber and the rear point of home plate on a baseball field (60 feet, 6 inches)^[1]
• 20 metres – length of cricket pitch (22 yards)^[2]
• 27.43 metres – distance between bases on a baseball field (90 feet)
• 28 metres – length of a standard FIBA basketball court
• 28.65 metres – length of an NBA basketball court (94 feet)
• 49 metres – width of an American football field (53â…“ yards)
• 59.436 metres – width of a Canadian football field (65 yards)
• 70 metres – typical width of soccer field
• 91 metres – length of American football field (100 yards, measured between the goal lines)
• 105 metres – length of football pitch (UEFA Stadium Category 3 and 4)

Nature

• 10 metres – average length of human digestive tract
• 12 metres – length of a whale shark, largest living fish
• 12 metres – wingspan of a Quetzalcoatlus, a pterosaur
• 13 metres – length of a giant squid and colossal squid, the largest living invertebrates
• 15 metres – approximate distance the tropical circles of latitude are moving towards the equator and the polar circles are moving towards the poles each year due to a natural, gradual decrease in the Earth's axial tilt
• 18 metres – height of a Sauroposeidon, the tallest known dinosaur
• 20 metres – length of a Leedsichthys, the largest known fish ever lived
• 21 metres – height of High Force waterfall in England
• 33 metres – longest measured length of a blue whale,^[3] the largest animal on earth, living or extinct, in terms of mass
• 35 metres – length of a Supersaurus, the longest known dinosaur and longest vertebrate
• 40 metres – average depth beneath the seabed of the Channel tunnel
• 52 metres – height of Niagara Falls^[4]

Astronomical

• 30 metres – diameter of 1998 KY26, a rapidly spinning meteoroid

Distances longer than 100 metres

Notes

1. "Rule 1.04 The Playing Field" (PDF). Official Baseball Rules. Major League Baseball. 25 January 2010. pp. 1–5. Archived (PDF) from the original on 27 April 2011. Retrieved 1 April 2011. See especially Diagram No. 1, page 3.
2. "Law 7 (The pitch)". Laws of Cricket. Marylebone Cricket Club. October 2010. Archived from the original on 14 May 2011. Retrieved 1 April 2011.
3. "Animal Records". Smithsonian National Zoological Park. Archived from the original on 25 April 2009. Retrieved 29 May 2007.
4. "Niagara Falls Geology Facts & Figures". Niagara Parks Commission. Retrieved 29 June 2011.