Understanding Imperial Gallons per Second to Imperial Gallons per Hour Conversion
This conversion keeps the same UK imperial gallon (4.54609 litres) on both sides and only rescales the time unit from seconds to hours. An hour holds 3,600 seconds, so a steady per-second flow delivers 3,600 times as much over an hour. Engineers and plant operators use it to convert instantaneous pump readings into the hourly throughput figures common in water and process specifications.
Conversion Formula
To convert Imperial Gallons per Second to Imperial Gallons per Hour, multiply the number of Imperial Gallons per Second by this factor:
Step-by-Step Example
Convert 25 Imperial Gallons per Second to Imperial Gallons per Hour.
Write the formula:
Substitute the value:
Calculate the result:
How to Convert Imperial Gallons per Second to Imperial Gallons per Hour
Rescale the per-second flow to an hourly rate with one multiplication.
- Note the flow rate: Start with the value in Imperial Gallons per Second.
- Multiply by 3600: This is the number of seconds in an hour.
- Report the hourly rate: The result is Imperial Gallons per Hour — for example, 25 imp-gal/s × 3600 = 90000 imp-gal/h.
Imperial Gallons per Second to Imperial Gallons per Hour conversion table
| Imperial Gallons per Second (imp-gal/s) | Imperial Gallons per Hour (imp-gal/h) |
|---|---|
| 0 | 0 |
| 1 | 3600 |
| 2 | 7200 |
| 3 | 10800 |
| 4 | 14400 |
| 5 | 18000 |
| 6 | 21600 |
| 7 | 25200 |
| 8 | 28800 |
| 9 | 32400 |
| 10 | 36000 |
| 15 | 54000 |
| 20 | 72000 |
| 25 | 90000 |
| 30 | 108000 |
| 40 | 144000 |
| 50 | 180000 |
| 60 | 216000 |
| 70 | 252000 |
| 80 | 288000 |
| 90 | 324000 |
| 100 | 360000 |
| 150 | 540000 |
| 200 | 720000 |
| 250 | 900000 |
| 300 | 1080000 |
| 400 | 1440000 |
| 500 | 1800000 |
| 600 | 2160000 |
| 700 | 2520000 |
| 800 | 2880000 |
| 900 | 3240000 |
| 1000 | 3600000 |
| 2000 | 7200000 |
| 3000 | 10800000 |
| 4000 | 14400000 |
| 5000 | 18000000 |
| 10000 | 36000000 |
| 25000 | 90000000 |
| 50000 | 180000000 |
| 100000 | 360000000 |
| 250000 | 900000000 |
| 500000 | 1800000000 |
| 1000000 | 3600000000 |
What is the Imperial Gallon per Second?
The Imperial gallon per second (imp-gal/s) is a unit of volumetric flow rate, expressing the volume of liquid passing a point each second measured in Imperial (UK) gallons. It appears in British and Commonwealth engineering contexts such as pump ratings, water supply, and fuel handling.
Definition
One Imperial gallon per second equals one Imperial gallon of volume flowing every second. Since the Imperial gallon is defined as exactly 4.54609 litres, the flow rate converts directly to litres per second:
The Imperial gallon is fixed by definition as 4.54609 L exactly (originally the volume of 10 pounds of water). This makes it noticeably larger than the US liquid gallon of 3.785411784 L, so an Imperial gallon per second delivers about 20% more volume than a US gallon per second.
Origin and History
The Imperial gallon was established by the British Weights and Measures Act of 1824, defined as the volume of ten pounds of distilled water at 62 °F. In 1985 the UK redefined it in metric terms as exactly 4.54609 litres. As a rate unit, gallons per second and the more common gallons per minute grew out of the need to specify pump and pipe throughput during the industrial era.
Law and Notable Facts
The Imperial gallon remains a legally recognised unit in the United Kingdom, though the litre is the primary trading unit under metrication. It is distinct from the US gallon: the Imperial gallon (4.54609 L) is roughly 20% larger than the US liquid gallon (3.785 L), so flow figures quoted in "gallons" must always specify which system. A flow of 1 imp-gal/s corresponds to 60 Imperial gallons per minute or 3,600 per hour.
Real-World Examples and Conversions
- A flow of 1 imp-gal/s equals 4.54609 L/s, or about 272.77 litres per minute.
- A typical domestic garden hose delivers well under 1 imp-gal/s; a rate of 1 imp-gal/s (≈16,366 L/h) is closer to a small industrial or firefighting pump.
- 1 imp-gal/s ≈ 1.20095 US gallons per second, reflecting the larger Imperial gallon.
- 1 imp-gal/s ≈ 0.00454609 cubic metres per second, useful when comparing against SI pump specifications.
What is the Imperial Gallon per Hour?
The imperial gallon per hour (imp-gal/h) is a unit of volumetric flow rate expressing how many imperial gallons of fluid pass a point in one hour. It is used in the UK and other Commonwealth countries for pumps, fuel consumption, and plumbing flow ratings.
Definition
One imperial gallon per hour equals one imperial gallon of volume divided by one hour (3,600 seconds):
The imperial gallon is defined as exactly 4.54609 litres, so dividing by 3,600 seconds gives 4.54609 / 3600 = 0.00126280 L/s (equivalently 4.54609 L/h).
Origin and History
The imperial gallon was established by the British Weights and Measures Act of 1824, originally defined as the volume of 10 pounds of water at a specified temperature. It was later fixed by reference to the litre. The "per hour" rate arose naturally in the 19th and 20th centuries as a practical measure for pump throughput and fuel usage, hours being a convenient interval for slow, steady flows.
Law and Notable Facts
The imperial gallon (4.54609 L exactly) is legally distinct from and about 20% larger than the US liquid gallon of 3.785411784 L. As a result an imperial gallon per hour is likewise about 20% greater than a US gallon per hour. Since UK metrication, the imperial gallon is no longer a primary trade unit but persists in fuel-economy figures (miles per gallon) and equipment specifications.
Real-World Examples and Conversions
- A small garden or aquarium pump rated at 100 imp-gal/h moves about 454.6 litres of water every hour, roughly 0.126 L/s.
- A domestic tap running at 1 imperial gallon per hour is a bare trickle of about 4.55 L each hour.
- 1 imp-gal/h ≈ 0.833 US gal/h, reflecting the larger imperial gallon.
- A pump moving 220 imp-gal/h delivers about 1,000 L/h, or roughly 0.278 L/s.
Frequently Asked Questions
What is the formula to convert Imperial Gallons per Second to Imperial Gallons per Hour?
Multiply the Imperial Gallons per Second value by 3600, the number of seconds in an hour.
How many Imperial Gallons per Hour are in 1 Imperial Gallon per Second?
One Imperial Gallon per Second equals 3,600 Imperial Gallons per Hour.
How do I convert 15 Imperial Gallons per Second to Imperial Gallons per Hour?
Multiply 15 by 3600 to get 54,000 Imperial Gallons per Hour.
Is this the same gallon on both sides?
Yes, both are the UK imperial gallon of 4.54609 litres, so only the timebase shifts from seconds to hours.
How do I convert Imperial Gallons per Hour back to Imperial Gallons per Second?
Divide by 3600, or multiply by 0.000277778, the reciprocal of 3600.