Volumetric flow rate.
Imperial gallon per Days to Gallon per Years Converter — imp gal/d to gal/yr
Convert Imperial gallon per Days (imp gal/d) to Gallon per Years (gal/yr) using the exact conversion factor (1 imperial gallon per days = 438.6379532 gallon per years). See the formula, worked examples, and conversion table.
Imperial gallon per Days to Gallon per Years converter
Converter
Flow Rate Converter
Convert volumetric flow rates across metric, US, imperial, industrial, and scientific units.
Context values
Some unit families need one extra value for a physically accurate result.
Volumetric flow rate.
Result = input x 5.26167824e-8 / 1.19954924e-10.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Imperial gallon per Days to Gallon per Years
Imperial gallon per Days and Gallon per Years both measure volumetric flow rate — how much volume passes a point over time — used to size pipes and pumps, monitor river or stream discharge, control industrial processes, and set medical infusion rates. Both are volumetric flow rate units.
Formula
gallon per years = imperial gallon per days × 438.637953166
This factor comes from each unit's defined relationship to the category's base unit: 1 imperial gallon per days equals 5.261678e-8 base units, and 1 gallon per years equals 1.199549e-10 base units, so dividing one by the other gives the direct imperial gallon per days-to-gallon per years factor of 438.637953166.
Simple example
1 imp gal/d × 438.6379532 = 438.6379532 gal/yr
1 imperial gallon per days = 438.6379532 gallon per years.
Real-world example
60 imp gal/d × 438.6379532 = 26,318.27719 gal/yr
60 imperial gallon per days = 26,318.27719 gallon per years.
Conversion table
| Imperial gallon per Days (imp gal/d) | Gallon per Years (gal/yr) |
|---|---|
| 0.1 imp gal/d | 43.86379532 gal/yr |
| 1 imp gal/d | 438.6379532 gal/yr |
| 10 imp gal/d | 4,386.379532 gal/yr |
| 60 imp gal/d | 26,318.27719 gal/yr |
| 100 imp gal/d | 43,863.79532 gal/yr |
| 1,000 imp gal/d | 438,637.9532 gal/yr |
Reverse conversion: Gallon per Years to Imperial gallon per Days
438.6379532 gal/yr × 0.002279784485 = 1 imp gal/d
438.6379532 gallon per years = 1 imperial gallon per days.
imperial gallon per days = gallon per years × 0.00227978448463
For a page dedicated to this direction, see Gallon per Years to Imperial gallon per Days.
Understanding the Imperial gallon per Days (imp gal/d)
Volumetric flow rate.
Understanding the Gallon per Years (gal/yr)
Volumetric flow rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many gallon per years are in 1 imperial gallon per days?
1 imperial gallon per days equals 438.6379532 gallon per years, using the exact defined conversion factor rather than an estimate.
How do I convert imperial gallon per days to gallon per years?
Multiply the imperial gallon per days value by 438.6379532. The converter above does this instantly to whatever precision you set.
How do I convert gallon per years back to imperial gallon per days?
Use the reverse factor: 1 gallon per years equals 0.0022797845 imperial gallon per days. You can also use the swap control in the converter above to flip the direction instantly.
What is a imperial gallon per days?
Imperial gallon per Days (imp gal/d) is a unit of flow rate.
What is a gallon per years?
Gallon per Years (gal/yr) is a unit of flow rate.
Is the imperial gallon per days to gallon per years conversion exact?
Yes. Both imperial gallon per days and gallon per years are defined by fixed standards rather than physical artifacts, so the factor of 438.6379532 used above is exact to as many digits as you choose to display.
What's the difference between volumetric and mass flow rate?
Volumetric flow rate measures the volume of fluid passing a point per unit time (for example, liters per second). Mass flow rate measures the mass instead. For a fluid of constant density the two are directly proportional, but for compressible fluids like gases, mass flow is often the more meaningful quantity.