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How long is 749 barleycorns?

It's about one-four-hundred-fifty-thousandth as long as The Danube
The length of The Danube is about 337,000,000 barleycorns.
(a.k.a. Donau, a.k.a. Dunaj, a.k.a. Dunav, a.k.a. Duna, a.k.a. Дунав (Dunav), a.k.a. Dunărea, a.k.a. Дунáй (Dunay), a.k.a. Tuna) (from Breg Martinskapelle, Black Forest, Germany through the Danube Delta, Romania)
The Danube river runs 337,000,000 barleycorns in total length. Intersecting Vienna, Austria; Bratislava, Slovakia; Budapest, Hungary; and Belgrade, Serbia, the Danube touches more capital cities than any other river.
It's about one-five-hundred-fifty-thousandth as long as The Oregon Trail
Flag of The US
The length of The Oregon Trail is about 412,000,000 barleycorns.
(from Independence, Missouri to Oregon City, Oregon)
The historic Oregon Trail stretched 412,000,000 barleycorns across five (sometimes six) states in the western United States. In the early years of the Trail's existence, the trip was estimated to have taken an average of 160 days.
It's about one-five-hundred-fifty-thousandth as long as The Volga
The length of The Volga is about 417,000,000 barleycorns.
(a.k.a. Волга, a.k.a. İdel (Идел), a.k.a. Атăл (Atăl), a.k.a. Edil, a.k.a. İdil, a.k.a. Рав (Rav)) (from the Valdai Hills, Tver Oblast, Russia through the Caspian Sea)
The largest river in Europe, the Volga river runs 417,000,000 barleycorns in total length. World War II's Battle of Stalingrad between the Nazi Germany and the Soviet Union, which resulted in nearly two million casualties, was fought in part for control of the river.
It's about one-six-hundred-thousandth as long as The Mississippi River
Flag of The US
The length of The Mississippi River is about 444,800,000 barleycorns.
(from Lake Itasca, Minnesota through Pilottown, Plaquemines Parish, Louisiana)
The total length of the Mississippi River is 444,800,000 barleycorns. Prior to the development of soil erosion programs, the Mississippi River would carry approximately 400 million metric tons of sediment from its banks to the Gulf of Mexico every year.
It's about one-seven-hundred-thousandth as long as The Distance from L.A. to New York
Flag of The US
The length of The Distance from L.A. to New York is about 530,000,000 barleycorns.
(Los Angeles, California to New York City, New York) (via I-10 E, I-15 N, I-70 E, I-76 E, I-80 E, I-280 E)
The total length of the freeway route from Los Angeles, California to New York City, New York via Interstate 80 is 530,000,000 barleycorns long. This route intersects eleven states and several major cities, including Las Vegas, Nevada; Denver, Colorado; Lincoln, Nebraska; Omaha, Nebraska; Des Moines, Iowa; South Bend, Indiana; and Cleveland, Ohio.
It's about one-seven-hundred-fifty-thousandth as long as I-80
Flag of The US
The length of I-80 is about 547,799,000 barleycorns.
(a.k.a. Interstate 80, a.k.a. Keystone Shortway) (net length)
Interstate 80, crosses the continent of North America from Teaneck, New Jersey to San Francisco, California and covers a total length of 547,799,000 barleycorns. A 7,086,610 barleycorns stretch between mile marker 318 in Grand Island, Nebraska and mile marker 390 in Lincoln, Nebraska is the longest straight path in the US Interstate system.
It's about 850,000 times as long as a Red Blood Cell
The length of a Red Blood Cell is about 0.00089 barleycorns.
(a.k.a. RBCs, a.k.a. haematids, a.k.a. erythrocyte, a.k.a. erythroid cells, a.k.a. red blood corpuscles)
An average Red Blood Cell measures 7.5 µm (micrometers) in diameter. An average human has 20 - 30 trillion red blood cells in their body and each cell completes a circulatory lap in about 20 seconds.
It's about one-one-millionth as long as The Great Wall of China (wall only)
Flag of China
The length of The Great Wall of China (wall only) is about 739,300,000 barleycorns.
(长城, 長城, Chángchéng, a.k.a. 万里长城, 萬里長城, Wànlǐ Chángchéng) (a.k.a. "The long wall of 10,000 Li") (from Shanhaiguan through Lop Nur, China) (wall segments only)
The Great Wall of China has total wall segment length of 739,300,000 barleycorns. Built and maintained in multiple sections over about eleven centuries, the Great Wall is currently suffering the effects of erosion, especially in the older sections made primarily out of mud.
It's about 0.0000010 times as long as The Amazon River
The length of The Amazon River is about 760,300,000 barleycorns.
(from Nevado Mismi, Arequipa, Peru through near Marajó, Brazil) (approximate distance)
The Amazon River has an approximate distance of 760,300,000 barleycorns. Although by most measures it is the largest and one of the most significant rivers in the world, the region surrounding the Amazon is mostly sparsely populated and the river itself has no bridges across it at any point.
It's about 1,000,000 times as long as a Cell's Nucleus
The length of a Cell's Nucleus is about 0.00071 barleycorns.
(for animal cell)
The nucleus of an animal cell measures an average of 0.00071 barleycorns. The nucleus is the largest organelle in these cells, accounting for about 10% of the cell's total volume.
It's about 0.0000007 times as long as The Great Wall of China (total)
Flag of China
The length of The Great Wall of China (total) is about 1,050,000,000 barleycorns.
(长城, 長城, Chángchéng, a.k.a. 万里长城, 萬里長城, Wànlǐ Chángchéng) (a.k.a. "The long wall of 10,000 Li") (from Shanhaiguan through Lop Nur, China) (total length, all branches)
The Great Wall of China, including all branches and trenches, is 1,050,000,000 barleycorns. Built and maintained in multiple sections over about eleven centuries, the Great Wall is currently suffering the effects of erosion, especially in the older sections made primarily out of mud.
It's about 0.0000005 times as long as The Diameter of Earth
The length of The Diameter of Earth is about 1,506,646,400 barleycorns.
(Equatorial)
The Earth — not a perfect sphere, but rather an oblate spheroid with bulged middle — has a diameter of approximately 1,506,646,400 barleycorns at the Equator. The first complete view of Earth's diameter was in a photograph taken from a V-2 rocket launched in 1946 by the United States Army, which reached an altitude of 12,355,200 barleycorns.
It's about 3,000,000 times as long as a Bacterium
The length of a Bacterium is about 0.00024 barleycorns.
(Escherichia coli) (rod-shaped configuration)
An rod-shaped E. coli bacterium measures about 0.00024 barleycorns in length. A staple of biology labs, E. coli can reproduce in as little as twenty minutes.
It's about 3,500,000 times as long as a Mitochondrion
The length of a Mitochondrion is about 0.000222 barleycorns.
(Eukaryotic; average)
A mitochondrion measures between 0.75 and 3 micrometers (µm). The mitochondrion is commonly referred to as the powerhouse of the cell, responsible for the generation of ATP. The size, shape, and distribution of mitochondria varies widely, with human liver cells each having 1,000 to 2,000 mitochondria.
It's about 0.0000002 times as long as The Circumfrence of Earth
The length of The Circumfrence of Earth is about 4,733,269,400 barleycorns.
(Equatorial)
The Earth — not a perfect sphere, but rather an oblate spheroid with bulged middle — has an Equatorial circumference of approximately 4,733,269,400 barleycorns. The first airplane trip around the circumference of the Earth (with a few stops along the way), was completed in 1924 by the United States Army Air Service, and took 175 days.
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