UK Gallons to Cubic Meters (imp gal to m³) Converter
1 UK gallon (imp gal) = 0.00454609 cubic meters (m³). To convert UK gallons to cubic meters, multiply by 0.00454609: 25 imp gal × 0.00454609 = 0.113652 m³. Also searched as UK gallons to cubic metres.
Quick facts
- 1 imp gal = 0.00454609 m³
- 1 m³ = 219.969 imp gal
- Formula: m³ = imp gal × 0.00454609
- Quick estimate: multiply by about 0.0045
How to convert UK gallons to cubic meters
- Start with your measurement in UK gallons.
- Multiply it by 0.00454609 (the number of cubic meters in one UK gallon).
- Round the result to the precision you need.
Worked example: 25 imp gal × 0.00454609 = 0.113652 m³.
To convert cubic meters back to UK gallons, multiply by 219.969, or divide by 0.00454609.
Source: NIST Handbook 44, Appendix C, and NIST SP 811 (US customary volume units).
UK Gallons to Cubic Meters conversion table
| UK Gallons [imp gal] | Cubic Meters [m³] |
|---|---|
| 0.01 imp gal | 0.0000454609 m³ |
| 0.1 imp gal | 0.000454609 m³ |
| 1 imp gal | 0.00454609 m³ |
| 2 imp gal | 0.00909218 m³ |
| 3 imp gal | 0.01363827 m³ |
| 5 imp gal | 0.02273045 m³ |
| 10 imp gal | 0.0454609 m³ |
| 20 imp gal | 0.0909218 m³ |
| 50 imp gal | 0.2273045 m³ |
| 100 imp gal | 0.454609 m³ |
| 1000 imp gal | 4.54609 m³ |
imp gal to m³ chart from 1 to 100
- 1 imp gal 0.00454609 m³
- 2 imp gal 0.00909218 m³
- 3 imp gal 0.0136383 m³
- 4 imp gal 0.0181844 m³
- 5 imp gal 0.0227305 m³
- 6 imp gal 0.0272765 m³
- 7 imp gal 0.0318226 m³
- 8 imp gal 0.0363687 m³
- 9 imp gal 0.0409148 m³
- 10 imp gal 0.0454609 m³
- 11 imp gal 0.050007 m³
- 12 imp gal 0.0545531 m³
- 13 imp gal 0.0590992 m³
- 14 imp gal 0.0636453 m³
- 15 imp gal 0.0681914 m³
- 16 imp gal 0.0727374 m³
- 17 imp gal 0.0772835 m³
- 18 imp gal 0.0818296 m³
- 19 imp gal 0.0863757 m³
- 20 imp gal 0.0909218 m³
- 25 imp gal 0.113652 m³
- 30 imp gal 0.136383 m³
- 35 imp gal 0.159113 m³
- 40 imp gal 0.181844 m³
- 45 imp gal 0.204574 m³
- 50 imp gal 0.227305 m³
- 55 imp gal 0.250035 m³
- 60 imp gal 0.272765 m³
- 65 imp gal 0.295496 m³
- 70 imp gal 0.318226 m³
- 75 imp gal 0.340957 m³
- 80 imp gal 0.363687 m³
- 85 imp gal 0.386418 m³
- 90 imp gal 0.409148 m³
- 95 imp gal 0.431879 m³
- 100 imp gal 0.454609 m³
Cubic Meters to UK Gallons conversion table
| Cubic Meters [m³] | UK Gallons [imp gal] |
|---|---|
| 0.01 m³ | 2.199692483 imp gal |
| 0.1 m³ | 21.9969248299 imp gal |
| 1 m³ | 219.9692482991 imp gal |
| 2 m³ | 439.9384965982 imp gal |
| 3 m³ | 659.9077448973 imp gal |
| 5 m³ | 1099.8462414954 imp gal |
| 10 m³ | 2199.6924829909 imp gal |
| 20 m³ | 4399.3849659818 imp gal |
| 50 m³ | 10998.4624149544 imp gal |
| 100 m³ | 21996.9248299088 imp gal |
| 1000 m³ | 219969.2482990878 imp gal |
UK Gallons vs Cubic Meters
| UK Gallon | Cubic Meter | |
|---|---|---|
| Symbol | imp gal | m³ |
| Equals | 1 imp gal = 0.00454609 m³ | 1 m³ = 219.969 imp gal |
What is a UK gallon?
The imperial gallon, defined as exactly 4.54609 litres (UK Weights and Measures Act 1985); about 20% larger than the US gallon. Used in the UK and Canada for fuel economy (miles per gallon), garden and aquarium volumes, and older fuel prices.
What is a cubic meter?
The SI derived unit of volume, equal to 1,000 liters. Used for large volumes such as water usage, shipping containers, and concrete.
When You Need to Convert UK Gallons to Cubic Meters
UK gallons are used mainly in the UK (pub pints, fuel economy in mpg) and older Canadian recipes, while cubic meters are used mainly in Canada, the UK and most of the world, and in US science, medicine and nutrition labels. Canada and the UK use a mix of metric and imperial units while the US uses customary units, so students, engineers, travellers and shoppers in all three countries switch between them often.
How big is 1 imp gal compared with 1 m³?
1 imp gal is only 0.00454609 of 1 m³: you need 219.969 UK gallons to make 1 m³, so the number gets smaller when you convert.
UK Gallons to Cubic Meters without a calculator
- In your head: multiply by 0.005 (about 10% off). 45 imp gal × 0.005 ≈ 0.225 m³.
- Closer estimate: multiply by 0.0045 (within 1%).
- Or divide: divide by 220 (within 0.014%), which is often easier than multiplying by a small decimal.
Real-world imp gal to m³ examples
| Example | UK Gallons | Cubic Meters |
|---|---|---|
| One imperial gallon | 1 imp gal | 0.00454609 m³ |
| A small aquarium | 10 imp gal | 0.0454609 m³ |
| A garden water butt | 45 imp gal | 0.204574 m³ |
| One tonne of water | 219.969 imp gal | 1 m³ |
| A 20-foot shipping container | 7258.99 imp gal | 33 m³ |
| A month of household water | 3299.54 imp gal | 15 m³ |
How exact is the imp gal to m³ factor?
The factor is exact by definition, so any error comes only from rounding. For everyday use, 3 significant figures are plenty; for engineering or invoices, keep 5 or more.
Mistakes to avoid
- This page uses the imperial (UK) measure. A US measure with the same name is smaller, so make sure your source is British or older Canadian.
- Volume factors are the cube of length factors, so a small rounding error in the length becomes three times larger in the volume.
Background on UK gallons and cubic meters
The imperial gallon was introduced in 1824 and is defined as exactly 4.54609 litres.
What people convert next
People who convert uk gallons to cubic meters often need us gallons to cubic meters, cubic meters to liters, uk gallons to liters and uk gallons to us gallons. The full volume converter lists every unit.
On pakmath.com, the percentage calculator is a useful next step, as is the scientific calculator; our sister site Adzita has a fuel cost calculator.
Frequently asked questions
How many cubic meters are in a UK gallon?
There are 0.00454609 cubic meters in 1 UK gallon (1 imp gal = 0.00454609 m³).
How many UK gallons are in a cubic meter?
There are 219.969 UK gallons in 1 cubic meter (1 m³ = 219.9692482991 imp gal).
How do I convert UK gallons to cubic meters?
Multiply the number of UK gallons by 0.00454609. For example, 10 imp gal × 0.00454609 = 0.0454609 m³. To convert back, multiply by 219.969.
What is 10 imp gal in cubic meters?
10 imp gal = 0.0454609 m³.
What is 100 imp gal in cubic meters?
100 imp gal = 0.454609 m³.
Is the imp gal to m³ conversion exact?
Yes. The factor comes from the official definitions of both units (NIST Handbook 44, Appendix C, and NIST SP 811 (US customary volume units)). Results are shown to up to 10 decimal places; round them to suit your purpose.
What is an easy way to convert UK gallons to cubic meters?
In your head: multiply by 0.005 (about 10% off). 45 imp gal × 0.005 ≈ 0.225 m³.
How many cubic meters is 45 imp gal (a garden water butt)?
45 imp gal = 0.204574 m³.
How many UK gallons is a month of household water (15 m³)?
15 m³ = 3299.54 imp gal.
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