Understanding Imperial Gallons per Minute to Imperial Gallons per Day Conversion
Both units use the same 4.54609-litre Imperial gallon, so this is a pure time conversion. Since a day contains 1,440 minutes, one Imperial gallon per minute equals exactly 1,440 Imperial gallons per day. This is widely used to estimate daily UK water consumption or pump duty from a per-minute reading.
Conversion Formula
To convert Imperial Gallons per Minute to Imperial Gallons per Day, multiply the number of Imperial Gallons per Minute by this factor:
Step-by-Step Example
Convert 25 Imperial Gallons per Minute to Imperial Gallons per Day.
Write the formula:
Substitute the value:
Calculate the result:
How to Convert Imperial Gallons per Minute to Imperial Gallons per Day
Use the fixed factor of 1440 to turn any Imperial-gallon-per-minute flow into Imperial Gallons per Day.
- Note the flow rate: Start with your value in Imperial Gallons per Minute (imp-gal/min).
- Apply the factor: Multiply that value by 1440 to convert into Imperial Gallons per Day (imp-gal/d).
- Read the result: The product is your flow expressed in Imperial Gallons per Day.
For example, 25 imp-gal/min × 1440 ≈ 36000 imp-gal/d.
Imperial Gallons per Minute to Imperial Gallons per Day conversion table
| Imperial Gallons per Minute (imp-gal/min) | Imperial Gallons per Day (imp-gal/d) |
|---|---|
| 0 | 0 |
| 1 | 1440 |
| 2 | 2880 |
| 3 | 4320 |
| 4 | 5760 |
| 5 | 7200 |
| 6 | 8640 |
| 7 | 10080 |
| 8 | 11520 |
| 9 | 12960 |
| 10 | 14400 |
| 15 | 21600 |
| 20 | 28800 |
| 25 | 36000 |
| 30 | 43200 |
| 40 | 57600 |
| 50 | 72000 |
| 60 | 86400 |
| 70 | 100800 |
| 80 | 115200 |
| 90 | 129600 |
| 100 | 144000 |
| 150 | 216000 |
| 200 | 288000 |
| 250 | 360000 |
| 300 | 432000 |
| 400 | 576000 |
| 500 | 720000 |
| 600 | 864000 |
| 700 | 1008000 |
| 800 | 1152000 |
| 900 | 1296000 |
| 1000 | 1440000 |
| 2000 | 2880000 |
| 3000 | 4320000 |
| 4000 | 5760000 |
| 5000 | 7200000 |
| 10000 | 14400000 |
| 25000 | 36000000 |
| 50000 | 72000000 |
| 100000 | 144000000 |
| 250000 | 360000000 |
| 500000 | 720000000 |
| 1000000 | 1440000000 |
What is the Imperial Gallon per Minute?
The imperial gallon per minute is a unit of volumetric flow rate, measuring how many imperial (UK) gallons of liquid pass a point each minute. It is common in British and Commonwealth plumbing, pumping, and irrigation specifications.
Definition
One imperial gallon per minute equals one imperial gallon (4.54609 litres exactly) of volume flowing every 60 seconds:
Because the imperial gallon is defined as exactly 4.54609 L, the exact relation is L/s. Note that the imperial gallon is about 20% larger than the US liquid gallon (3.785411784 L), so an imperial gpm is a larger flow than a US gpm.
Origin and History
The imperial gallon dates to the British Weights and Measures Act of 1824, which fixed it as the volume of 10 pounds of distilled water. It was redefined in 1976 (effective 1985) as exactly 4.54609 litres. The "per minute" flow rate arose naturally from waterworks and pump ratings, where minutes are a convenient interval for reading meters and sizing equipment.
Law and Notable Facts
The imperial gallon remains a legal unit in the United Kingdom and several Commonwealth nations, though the litre per second and cubic metre per hour are the SI-based standards for engineering. A tap flowing at 1 imp-gal/min delivers about 4.55 litres every minute; UK water-efficiency guidance often rates fittings in litres per minute, where 1 imp-gal/min corresponds to roughly 4.55 L/min.
Real-World Examples and Conversions
- A typical domestic kitchen tap or shower flows around 2 to 3 imp-gal/min (about 9 to 14 L/min).
- 1 imp-gal/min equals 60 imperial gallons per hour, or approximately 4.546 cubic metres per hour when multiplied out over an hour ( litres/hour, i.e. 0.27277 m³/h).
- To convert to US gallons per minute, multiply by 1.20095: 1 imp-gal/min ≈ 1.201 US gpm.
- A small garden pump rated at 10 imp-gal/min moves about 0.758 litres per second, enough to fill a 200-litre water butt in roughly 4.4 minutes.
What is the Imperial Gallon per Day?
The Imperial gallon per day (imp gal/d) is a unit of volumetric flow rate that expresses how many Imperial gallons of a fluid pass a point over the span of one day. It is used in the UK and Commonwealth countries for water supply, well yields, plumbing, and utility metering.
Definition
One Imperial gallon per day equals one Imperial gallon of volume divided by the 86,400 seconds in a day. Expressed in SI units of litres per second:
This follows directly from the exact definitions: an Imperial gallon = 4.54609 L exactly, and one day = 86,400 s, so L/s.
Origin and History
The Imperial gallon was fixed by the British Weights and Measures Act of 1824, originally as the volume of 10 pounds of distilled water. It was later redefined in metric terms and, since 1985, has been exactly 4.54609 litres. Expressing flow "per day" arose naturally from water-utility billing and reservoir management, where daily throughput is the practical accounting period.
Law and Notable Facts
The Imperial gallon remains a legally recognised unit in the United Kingdom and several Commonwealth nations, distinct from the smaller US gallon (3.785411784 L exactly). Because of this, an Imperial gallon per day is about 20% larger than a US gallon per day (1 imp gal/d ≈ 1.20095 US gal/d), a difference that matters when reading equipment specified in the other system.
Real-World Examples and Conversions
- A typical UK household uses on the order of 100 Imperial gallons per day (about 455 litres), which is roughly 0.00526 L/s.
- A small trickling borehole yielding 1,000 imp gal/d supplies about 4,546 litres daily, or roughly 0.0526 L/s.
- Converting to metric daily volume: 1 imp gal/d = 4.54609 litres per day.
- 1,000,000 imp gal/d (a common water-treatment plant rating) equals about 52.6 L/s, or roughly 4.546 megalitres per day.
Frequently Asked Questions
What is the formula to convert Imperial Gallons per Minute to Imperial Gallons per Day?
Multiply the flow in Imperial Gallons per Minute by 1440. In symbols, imp-gal/d = imp-gal/min × 1440.
How many Imperial Gallons per Day are in 1 Imperial Gallon per Minute?
One Imperial Gallon per Minute equals about 1440 imp-gal/d. Conversely, one imp-gal/d is about 0.000694444 imp-gal/min.
How do I convert 10 Imperial Gallons per Minute to Imperial Gallons per Day?
Multiply 10 by 1440, which gives about 14400 imp-gal/d.
Why does the Imperial gallon matter in this conversion?
The Imperial (UK) gallon is 4.54609 litres, larger than the US gallon of 3.78541 litres, so a flow in imp-gal/min must use the Imperial value to get the correct result.
Where is the Imperial Gallons per Minute to Imperial Gallons per Day conversion used?
It is used to project daily UK water usage or pump output from a steady flow measured in Imperial gallons per minute.