How many cubic feet of water are in a 5 gallon bucket?

Quick Answer

A 5 gallon bucket contains 0.67 cubic feet of water. This is calculated by converting the volume of 5 gallons to cubic feet using the conversion factor that 1 US gallon equals 0.133681 cubic feet. So 5 gallons multiplied by 0.133681 cubic feet per gallon equals 0.6684 cubic feet, rounded to 0.67 cubic feet.

Calculating Cubic Feet from Gallons

To find out how many cubic feet are in a certain number of gallons, we need to use the following conversion:

1 US gallon = 0.133681 cubic feet

This allows us to convert between the volume units of gallons and cubic feet.

Let’s break this conversion factor down:

– 1 US gallon is the volume of 1 gallon
– 0.133681 cubic feet is the equivalent volume in cubic feet

So if we have a certain number of gallons, we can multiply it by 0.133681 cubic feet per gallon to find out the volume in cubic feet.

For example, to calculate the cubic feet in 5 gallons:

– 5 gallons
– Multiplied by 0.133681 cubic feet per gallon
– Equals 0.6684 cubic feet

Rounding 0.6684 cubic feet to two decimal places gives 0.67 cubic feet.

Therefore, a 5 gallon bucket contains 0.67 cubic feet of water.

Converting Volume Units

Converting between volume units is useful for visualizing and comparing amounts. Volume tells us how much space something takes up.

Some key points about volume unit conversion:

– It involves multiplying by a conversion factor between the units
– The conversion factor is based on how the units relate to each other
– Common volume units include:
– Gallons
– Liters
– Cubic inches
– Cubic feet
– Cubic meters
– Larger units contain smaller units (e.g. 1 cubic foot = 1728 cubic inches)

Being able to convert between different volume units allows us to express volumes in the most appropriate unit for the situation.

For the 5 gallon bucket example, cubic feet make sense as a unit when looking at the overall space the water would take up. But gallons are more practical for measuring out an amount of water to use.

Gallons to Liters Conversion

As another example, to convert gallons to liters:

– 1 US gallon = 3.78541 liters

So 5 gallons x 3.78541 liters per gallon = 18.927 liters

This allows us to express the 5 gallon volume in the metric unit of liters.

Cubic Inches to Cubic Feet

To convert cubic inches to cubic feet:

– 1 cubic foot = 1728 cubic inches

So 10,000 cubic inches x 1 cubic foot / 1728 cubic inches = 5.787 cubic feet

Being able to move between cubic inches and cubic feet is useful for visualizing volumes of objects.

Cubic Feet in Common Items

To get a better sense of cubic foot volumes, here are some estimates for common items:

Item Cubic feet
Refrigerator 25-35
Oven 4-8
Car trunk 12-16
Shed 100-500
Compact car interior 45-55
SUV interior 65-85

This helps give a sense of scale for cubic foot volumes. For example, a 5 gallon bucket at 0.67 cubic feet would take up a tiny fraction of space compared to a refrigerator.

Looking at cubic feet for familiar objects makes it easier to estimate and compare volumes visually.

Applications of Volume in Cubic Feet

Some uses and applications for volume in cubic feet:

Construction and Home Improvement

When building or remodeling, cubic feet are useful for calculating:

– Amount of material needed (lumber, concrete, soil)
– Space taken up by structures
– Capacity of spaces (rooms, walls, containers)

Cubic feet allow contractors to plan projects and estimate costs more accurately based on the volumes involved.


In landscaping, cubic feet can be used to:

– Measure soil amounts for planting beds
– Estimate gravel, mulch, or compost needs
– Plan for hardscaping features like patios and retaining walls

Knowing the cubic foot capacity lets landscape designers develop plans to fit the available space.


For storage and organization, cubic feet help with:

– Optimizing space when packing boxes, furniture, appliances
– Comparing storage unit sizes
– Planning shelf and cabinet capacity

The volume of items being stored can be calculated or estimated in cubic feet. This makes it easier to assess how much space is required.


In shipping and logistics, cubic feet are used for:

– Billing freight based on volume rather than weight
– Planning truck load capacity
– Stacking shipping containers and pallets efficiently

Cubic feet allow shippers to maximize space when transporting goods. It’s one of the key metrics used in logistics.

Converting Cubic Feet to Gallons Examples

While we’ve looked at converting gallons to cubic feet, it’s also possible to go the other way and convert cubic feet to gallons.

The conversion factor is:

1 cubic foot = 7.48052 gallons

Let’s look at some examples:

Swimming Pool Volume

An average swimming pool holds 18,000 to 20,000 gallons. We can convert this to cubic feet:

– 20,000 gallons
– 1 cubic foot / 7.48052 gallons
– = 2,672 cubic feet

So a 20,000 gallon pool equals about 2,672 cubic feet.

Fish Tank Volume

A large fish tank may hold 100 gallons. Converting to cubic feet:

– 100 gallons
– 1 cubic foot / 7.48052 gallons
– = 13.4 cubic feet

So a 100 gallon fish tank is equivalent to 13.4 cubic feet.

Water Tanker Volume

A tanker truck can transport ~9,000 gallons of water. In cubic feet this is:

– 9,000 gallons
– 1 cubic foot / 7.48052 gallons
– = 1,203 cubic feet

This shows that 9,000 gallons fills about 1,203 cubic feet of tank space.

Converting between the units both ways allows us to visualize volumes in different contexts.

Comparing Cubic Feet to Other Units

To summarize our key points so far, and help relate cubic feet to other common volume units:

Cubic feet to gallons

– 1 cubic foot = 7.48052 US gallons
– 5 cubic feet = 37 gallons

Cubic feet provide a measurement in 3-dimensional space, while gallons are a useful unit for amounts of liquids.

Cubic feet to liters

– 1 cubic foot = 28.31684 liters
– 10 cubic feet = 283 liters

When working with metrics, cubic feet can be converted to liters to express 3D volumes.

Cubic feet to cubic inches

– 1 cubic foot = 1,728 cubic inches
– 50 cubic feet = 86,400 cubic inches

For small 3D objects or spaces, cubic inches are often easier to visualize than cubic feet.

So cubic feet can be related to other common units as needed. The choice of unit depends on the context and scale of the volume being measured.

Final Thoughts

To summarize, a 5 gallon bucket contains about 0.67 cubic feet of volume. By converting gallons to cubic feet using the ratio of 0.133681 cubic feet per gallon, we can find the equivalent cubic foot measurement for any volume in gallons.

Cubic feet allow us to visualize volumes in 3D space and are useful for construction, storage, shipping, and other applications. Converting between cubic feet and other units like gallons, liters, or cubic inches allows us to express volume in the most relevant way.

Understanding volume conversions helps us better quantify and compare 3D spaces and capacities in the world around us.

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