Convert 500 gal to impgal

How to convert US gallons to imperial gallons

1. Formula: imperial gallons = US gallons × 0.83267418
2. Put in the value: 500 US gallons.
3. Result: 416.337092 imperial gallons.

US gallons to imperial gallons table

Converting the other way: imperial gallons to US gallons

US gallons = imperial gallons × 1.20095. So 416.337092 imperial gallons is back to 500 US gallons; one imperial gallon is 1.20095 US gallons. See the imperial gallons to US gallons table.

Quick estimate in your head

For a rough answer, multiply by about 0.8: 500 × 0.8 ≈ 400 impgal, against the exact 416.337092 impgal (3.9% out). Good enough to check that a calculated result is sensible.

Common mistakes

The usual slip is using the factor the wrong way round. A US gallon is smaller than a imperial gallon, so the number of imperial gallons must come out smaller than the number of US gallons. If your answer goes the other way, divide instead of multiplying.

About the units

US gallon (gal) and imperial gallon (impgal) are both units of volume. One US gallon equals 0.83267418 imperial gallons, and one imperial gallon equals 1.20095 US gallons. Results on this page are rounded for display; the conversion itself uses the exact definitions.

Volume conversions come up in recipes, fuel economy, drink and bottle sizes, garden and pool water, and engine sizes.

500 US gallons in other units

The most readable unit for this amount is cubic meters (1.892706).

• 1,892,705.89 ml
• 1,892.71 l
• 1.892706 m3
• 384,000 tsp
• 128,000 tbsp
• 64,000 floz
• 8,000 cup
• 4,000 pt
• 2,000 qt
• 416.337092 impgal