Updated October 28, 2026
A wildfire burns "an area the size of 1,000 football fields". A reservoir loses "400 Olympic pools" of water. An asteroid is "as long as three blue whales". Reporters reach for these units because few readers can picture 5 square kilometers or a million liters. A familiar object is easier to imagine than a bare number.
The catch: every one of these units hides a real measurement, and the measurement is not always the one you expect. This page gives the official value behind each unit, names the source, and lets you convert any length, area or volume yourself.
Enter a length, an area or a volume. The converter shows it in news units and lists the reference value it divides by. Everything runs in your browser.
Method: the converter turns your input into meters, square meters or cubic meters with the exact definitions from NIST (1 ft = 0.3048 m, 1 US gallon = 231 cubic inches), then divides by each reference value in the table below. Results are rounded to 3 significant figures.
| News unit | Official value | Source |
|---|---|---|
| American football field (length) | 100 yards (91.44 m) goal line to goal line; 120 yards (109.73 m) with both end zones | NFL Official Playing Rules, Rule 1 (The Field) |
| American football field (area) | 360 ft × 160 ft = 57,600 ft², about 5,351 m² or 1.32 acres, end zones included | NFL Official Playing Rules, Rule 1 |
| Olympic swimming pool | 50 m long and at least 25 m wide: 1,250 m² of surface. The news convention of 2,500 m³ (2.5 million liters) assumes a depth of 2 m; at the current 2.5 m minimum depth the pool holds 3,125 m³ | World Aquatics Competition Regulations, Part 2, 15.3 and 15.4 (Olympic Games and World Championships); FINA Facilities Rules 2017-2021, FR 3.3 (2 m) |
| Blue whale | Up to 110 ft (33.5 m) long in the Antarctic; up to about 90 ft (27.4 m) in the North Atlantic and North Pacific | NOAA Fisheries, blue whale species profile |
| Eiffel Tower | 330 m tall, antennas included | SETE, the company that operates the tower |
Two of these values are upper limits, not averages. NOAA gives 110 feet as the maximum length of a blue whale; most adults are shorter. And Olympic pool depth is a minimum that has changed. The older FINA rules set 2 m; current World Aquatics regulations set 2.5 m for the Olympic Games and World Championships. A 2.5 m deep pool of the same size holds 3,125 m³, a quarter more water. When a headline says "Olympic pools", the 2.5 million liter figure is the usual convention, not a measured amount.
Which football? In the United States, "football field" means the NFL field. Elsewhere, readers may picture a soccer pitch, and soccer pitches do not have one size. The IFAB Laws of the Game allow a touchline of 90 to 120 m, and 100 to 110 m for international matches. An "area of 100 football fields" can therefore differ by a large margin between two stories.
End zones in or out? The NFL field is 100 yards between the goal lines, but 120 yards from one end line to the other. Area comparisons normally use the full 360 by 160 foot rectangle. Length comparisons often use 100 yards. The difference is 20 percent.
Maximum or typical? "As long as a blue whale" uses the largest animals on record. A typical adult is shorter, so the real object is often smaller than the comparison suggests.
Height, length or volume? An Eiffel Tower is a height. Turning it on its side to measure a road or a queue is fine, but it says nothing about area or weight.
None of this makes the units useless. They work well for a rough sense of scale: ten football fields is a short walk, ten thousand is a small town. When the exact amount matters, look for the number in meters, acres or liters, which most careful reports also print.
Usually an American football field: 100 yards (91.44 m) between the goal lines, or 120 yards (109.73 m) with both end zones, per the NFL Official Playing Rules. The full field including end zones covers 57,600 square feet, about 5,351 square meters or 1.32 acres.
The usual news figure is 2.5 million liters: a 50 m by 25 m pool, 2 m deep, the minimum depth in the older FINA Facilities Rules (2017-2021). Current World Aquatics regulations set a 2.5 m minimum depth for the Olympic Games and World Championships, which gives 3,125 cubic meters. The unit is a convention, not an exact amount.
The tower's operator, SETE, gives its height as 330 meters, including the antennas at the top.
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