Exterior Dimensions
Exact measurements of the Great Pyramid were first made by W.M. Flinders Petrie, and published in 1883 by the Royal society in his book, "The Pyramids and Temples of Gizeh". The Great Pyramid was professionally surveyed by J.H. Cole, and the measurements were published in his "Determination of the Exact Size and Orientation of the Great Pyramid", published by Government Press, Cairo, 1925. Many of these measurements were subsequently recorded in "The Great Pyramid Decoded", by Peter Lemesurier, 1977.
Height (including capstone): 480.69 feet
Courses: 201 (40 storeys)
Length of Sides:
West: 755.76 feet
North: 755.41 feet
East: 755.87 feet
South: 756.08 feet
Perimeter: 3023.22 feet
Angle of Corners
Northwest: 89° 59' 58"
Northeast: 90° 3' 02"
Southeast: 89° 56' 02"
Southwest: 90° 3' 02"
Apothem
(Distance from the apex, or highest point, down one side to the center of a base): 610 feet
Slope of North Face: 51° 50' 40"
Area of the Base: 13 acres
Number of Blocks: more than 2.5 million
Weight of Blocks: 2-70 tons each
Size of original limestone casing stones: Some weigh 15 tons each
Latitude of the Apex: 29° 58' 51" North
Longitude of the Apex: 31° 8' 2" East
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Dimensions of Interior Chambers
From measurements taken by Petrie and Rutherford
Ascending Passage
Height: 3.94 ft
Length: 97.6 ft
Width: 3.4 ft
Slope: 26°
Descending Passage:
Height: 3.94 ft
Length: 344.3 ft
Width: 3.4 ft
Slope: 26° 30'
Subterranean Chamber:
Length: 46.1 ft
Width: 26.9 ft
Dead End Passage Length: 53.8 ft
Grand Gallery
Height: 28.2 ft.
Width: 3.4 ft
Length: 156.9 ft
Slope: 26°
King's Chamber
Length: 34.38 ft
Width: 17.19 ft
Height (to floor surface): 17.1 ft
Height (to true base): 19.2 ft
Queen's Chamber
Passage (first portion)
Height: 3.9 ft
Width: 3.4 ft.
Passage (second protion)
Height: 5.6
Width: 3.4 ft
Length (E to W): 18.9 ft
Width (N to S): 17.19 ft
Height: 15.3 ft
Height to Apex: 20.3
Slope of ceiling: 30° 26'
Angle of "Air Shafts"
Queen's Chamber
North: 39°
South: 39° 30'
King's Chamber
North: 32° 28'
South: 45°
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