Math and Arithmetic

Units of Measure

How many ft in 5 gal?

## Answer

###### Wiki User

###### May 23, 2017 9:03AM

None, since there can be no conversion. A foot is a measure of
**length** in 1-dimensional space while a gallon is a measure of
**volume** in 3-dimensional space. The two measure different
characteristics and, according to the most basic principles of
dimensional analysis, any attempt at comparisons or conversions
between the two are fundamentally flawed.

## Related Questions

###### Asked in Math and Arithmetic

### How many gallons in a round fuel tank 5 feet long and 3 feet diameter?

The volume is that of a cylinder:
radius = ½ × diameter
volume = π × redius² × height = π × (½ × 3)² × 5 ft³ = 11¼π ft³
≈ 35.343 ft³
What this is in gallons depends upon the gallon used:
1 ft³ ≈ 6.229 imp gal → 35.343 ft³ ≈ 35.343 × 6.229 imp gal ≈
220.15 imp gal
1 ft³ ≈ 7.481 US gal → 35.343 ft³ ≈ 35.343 × 7.481 US gal ≈
264.38 US gal

###### Asked in Math and Arithmetic, Volume

### How many gallons in a circular pond 1 foot deep and 5 feet across?

The pond is a cylinder;
radius = ½ × diameter
volume_cylinder = π × radius² × height
→ volume_pond = π × (½ × 5 ft)² × 1 ft = 25π/4 ft³ ≈ 19.63
ft³
Converting this to gallons depends where you are:
* In UK:
1 ft³ ≈ 6.23 imp gal
→ 19.63 ft³ ≈ 19.63 × 6.23 imp gal ≈ 122.3 imp gal
* In USA:
1 ft³ ≈ 7.48 US gal
→ 19.63 ft³ ≈ 19.63 × 7.48 US gal ≈ 146.9 US gal
(Other countries probably use the same as the UK: the imperial
gallon.)

###### Asked in Volume

### How many cubic yards in 28000 gal?

###### Asked in Math and Arithmetic

### How many gallons in a tank that is 3 feet by 14 feet by 7 feet?

Assuming that is the internal dimensions
→ volume = 3 ft x 14 ft x 7 ft = 294 cu ft
Converting to gallons depends where you are, which will lead to
a different gallon:
* UK: 1 cu ft ≈ 6.229 imp gal → 294 cu ft ≈ 294 x 6.229 imp gal
≈1,831.28 gallons
* US: 1 cu ft ≈ 7.481 US gal → 294 cu ft ≈ 294 x 7.481 US gal ≈
2,199.27 gallons