Imperial gallon to Cubic hectometer
imp gal
hm³
Conversion History
| Conversion | Reuse | Delete |
|---|---|---|
| No conversion history to show. | ||
Quick Reference Table (Imperial gallon to Cubic hectometer)
| Imperial gallon (imp gal) | Cubic hectometer (hm³) |
|---|---|
| 0.5 | 0.00000000227304499999 |
| 1 | 0.00000000454608999998 |
| 2 | 0.00000000909217999996 |
| 5 | 0.00000002273044999991 |
| 10 | 0.00000004546089999981 |
| 50 | 0.00000022730449999906 |
About Imperial gallon (imp gal)
The imperial gallon is a unit of volume defined as exactly 4.54609 liters, used in the United Kingdom, Canada, and some Commonwealth nations. It is approximately 20% larger than the US liquid gallon. Fuel economy in the UK is expressed in miles per imperial gallon. The imperial gallon divides into 8 imperial pints, each of 568 mL. The UK officially metricated fuel sales to liters in the 1980s–1990s, but miles per imperial gallon remains the legal unit for new car fuel economy labels.
UK car fuel economy figures are expressed in miles per imperial gallon. One imperial gallon equals 8 standard UK pints of beer.
About Cubic hectometer (hm³)
A cubic hectometer (hm³) is the volume of a cube with 100-meter sides, equal to one billion liters (10⁹ L). It is used in large-scale hydrology and reservoir engineering for dam and lake capacities, and is equivalent to one gigaliter (GL). One hm³ of water has a mass of one million tonnes. Reservoirs, aquifers, and annual river discharge volumes are commonly expressed in cubic hectometers, especially in Spanish-speaking countries and international water policy documents.
A large city's annual water supply might require 50–200 hm³. Lake Mead has a capacity of about 36,700 hm³.
Imperial gallon – Frequently Asked Questions
How many liters are in an imperial gallon?
One imperial gallon is defined as exactly 4.54609 liters — approximately 20% more than the US liquid gallon (3.785 L).
Does the UK still use gallons?
The UK switched fuel sales to liters in the 1990s. However, miles per gallon (imperial) remains the legal unit for car fuel economy on new vehicle labels. Road speed is in mph and distances are in miles, so imperial gallons remain embedded in UK motoring.
How does UK MPG differ from US MPG?
UK MPG uses the imperial gallon (4.546 L); US MPG uses the US gallon (3.785 L). Multiply UK MPG by 0.832 to get US MPG. A car rated 40 UK MPG ≈ 33 US MPG.
How many pints are in an imperial gallon?
There are exactly 8 imperial pints in one imperial gallon. Each imperial pint is 568 mL, compared to 473 mL for a US pint.
Is the imperial gallon still used in Canada?
Canada officially metricated in the 1970s and fuel is sold in liters. However, some older Canadians and certain agricultural contexts still reference imperial gallons informally. Canadian and UK imperial gallons are identical (4.54609 L).
Cubic hectometer – Frequently Asked Questions
What is a cubic hectometer?
A cubic hectometer (hm³) is the volume of a cube 100 meters on each side, equal to one million cubic meters or one billion liters (one gigaliter). It is used in hydrology and large-scale water management.
How many cubic meters are in a cubic hectometer?
One cubic hectometer equals 1,000,000 m³. Since 1 hm = 100 m, 1 hm³ = 100³ m³ = 1,000,000 m³ = one billion liters.
Where is hm³ used in practice?
The cubic hectometer is standard for reservoir capacity in Spanish-speaking countries and international water treaties. Dam capacity tables routinely list volumes in hm³.
Is hm³ the same as a gigaliter?
Yes, 1 hm³ = 1,000,000 m³ = 1,000,000,000 liters = 1 gigaliter (GL). Gigaliter is common in Australian water reporting while hm³ is preferred in European and Latin American hydrology.
How does a cubic hectometer compare to Lake Mead?
Lake Mead, the largest US reservoir, has a capacity of roughly 36,700 hm³. A typical European river dam might hold 50–500 hm³. The scale makes hm³ the natural unit for expressing national water reserves.