Convert US Pounds/Gal [lb/gal (US)] to Ounces/in³ [oz/in³] • Density Converter • Mechanical • Compact Calculator • Online Unit Converters (2023)

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Konverter pund/gallon (US) [lb/gal (US)] to ounce/in³ [oz/in³]

1 funt/gallon (US) [lb/gal (US)] = 0.069264069264 uncja/cal³ [oz/in³]

temperature range

Did you know that one degree Fahrenheit equals 5⁄9 degrees Celsius?

Convert US Pounds/Gal [lb/gal (US)] to Ounces/in³ [oz/in³] • Density Converter • Mechanical • Compact Calculator • Online Unit Converters (1)


Density Factors


The density of salt water

air density

Density calculation

volume shift

fabrics with cavities

Density of Common Substances

black buracos


Density indicates how much of a substance's mass is contained in a given volume. The SI unit for density is kg/m³, but alternative measures such as g/cm³ and kg/l are also used. In everyday life, the equivalent units g/cm³ and g/mL are most commonly used.

Density Factors

Density varies for substances depending on their temperature and pressure. The higher pressure causes the molecules of the substance to be more compacted in the same volume, increasing the density. On the other hand, an increase in temperature generally causes the molecules to move apart and thus reduce the density. However, this is not always true. For example, the density of ice is less than the density of water. When most other liquids solidify, the space between molecules shrinks. When water molecules freeze, the bonds in the molecules change strength and form a crystal. The space between molecules increases, the amount of water increases and the density decreases. The increased amount of ice means that water that freezes in domestic pipes in the winter can cause the pipes to burst.

Ice that floats on the "edge" between the less dense, blue colored isopropyl alcohol and pure water.


When materials are denser than water, they sink. On the other hand, less dense materials flow. A good example is ice floating in a glass of water. This property is often used in everyday life. In most cases, hollow objects designed with materials denser than water contain air, which is less dense than water. This allows the vessel to float as long as enough air is transferred into the cavity. In fishing, the sinker is made of high density materials such as metals to ensure the hook sinks in the water instead of floating, especially when the bait is low density and does not sink well.

Fat is less dense than water, which makes it easier to remove fat from soups, especially when refrigerated to solidify the fat, and from jellies as in the photo. Reproduced with permission of the author.

Oil is less dense than water, so it flows. This property of oil allows for easier cleaning in case of oil spills, which often occur at sea and damage the marine ecosystem. The tendency for oil and fat to run off is also useful in cooking – for example, we can remove liquid fat from our soup to reduce the percentage of fat and calories in a dish. This is especially easy if you refrigerate the soup until the fat solidifies. It's also easy to make into jam.

When preparing smoothies or other similar drinks, ingredients can be selected based on their density to create layers. To form layers, a lower density liquid is slowly poured into a higher density liquid. You can also use the glass stirrer as a liquid guide (not for stirring). If done carefully, this technique will prevent mixing and create a colorful, layered drink. This can also be done when making jellies or jellies, but if time permits it is easier to cool each layer separately and then pour the next layer.

The cherry tomato is suspended on the "edge" between the more dense salt water at the bottom, tinged with pink, and the less dense fresh water at the top. Tomatoes are less dense than salt water but more dense than fresh water, so they are suspended in the middle.

However, in some cases, this quality may not be desirable. For example, when fatty substances don't mix well with water, they can separate out, as in a poorly blended smoothie, making the food taste and look less desirable.

The density of salt water

The cherry tomato is suspended on the "edge" between the more dense salt water at the bottom, tinged with pink, and the less dense fresh water at the top. Tomatoes are less dense than salt water but more dense than fresh water, so they are suspended in the middle.

The density of water changes as the concentration of other substances mixed with the water changes. Water in nature does not always occur in the pure H form2Ah, but it is often mixed with other substances like salt. Sea water is a good example. For example, salt water in the oceans has a higher density than fresh water, which means that water with less salt floats in salt water. Of course, it is difficult to see water itself, but we can observe this property when we try to float in salt water. Our body is composed of 45% to 75% water, with a higher proportion in children and a lower proportion in the elderly and obese. We also have at least 5% of our body weight made up of fat. These numbers are for very lean athletes - most of us are at least 10% fat, but usually up to 20% in most healthy people and 25% or more in overweight and obese people.

When we try to swim in salt water and then in clean water, we will feel the difference - our body will find it easier to swim in salt water. The Dead Sea is famous for having about 7 times the concentration of salt in the world's oceans, which allows people to float in it without sinking. Although humans cannot sink below the surface of the water, care must be taken when swimming in the Dead Sea. Drinking water with a high salt content causes chemical burns that require hospital treatment in severe cases.

air density

This hot air balloon floats because the density of the hot air inside its envelope is less dense than the surrounding air. The ancient Mayan city of Teotihuacan, Mexico.

Like water, objects less dense than air float. For example, the density of helium is 0.000178 g/cm³ compared to 0.001293 g/cm³ of air. Since helium is less dense, it floats in the air, which can be seen by filling a balloon with helium and watching it float.

As the air temperature increases, its density decreases. This makes balloon flights possible. A hot air balloon at the archaeological site of the ancient Mayan city of Teotihuacan, Mexico (pictured), rises because the air inside it is heated above the temperature of the surrounding air, which consequently reduces the density inside the balloon's envelope. As the balloons rise above the pyramids, the cold morning air also cools the air inside them, and the operator must use a heater to keep the air inside the balloon's envelope warm.

Density calculation

Predicted density values ​​are available for many substances under standard temperature and pressure conditions, ie 0°C and 100 kPa. However, sometimes we may want to calculate the density manually, especially if the calculation is not performed under standard conditions. To do this, we can divide the mass by the volume, and we need to know these two values ​​for the substance. We can measure weight with a scale. Volume can be calculated from the geometric shape of an object for simple solids, using devices such as a measuring cup or other measuring vessels for liquids and gases. If the shape of a solid is too complex for geometry-based calculations, we can find its volume using the volumetric displacement method.

volume shift

We can perform these calculations for objects with complex shapes by pouring water into a measuring cup or similar container and measuring this initial amount of water. We then submerged our irregularly shaped object completely in water and measured how much water was displaced. This displaced volume is equal to the volume of the submerged object, an observation supposedly made by Archimedes. This method is only possible for objects that do not absorb water or cannot be damaged by water. We wouldn't use it to measure the volume of a camera or a piece of clothing, for example.

According to a contested legend, Archimedes was commissioned by King Hieron II of Syracuse to verify that the crown the king ordered a goldsmith to make was made of gold. The king suspected that the goldsmith had exchanged the gold, that the king had given him a cheaper alloy and taken advantage of the difference. Archimedes was able to determine this by calculating the density of the crown and comparing it to the then-known density of gold. It was not possible to melt the crown, so he had to find a way to calculate the volume without changing its shape. The story goes that he pondered and pondered what to do, and the solution came to him when he took a bath and threw himself into the water. Suddenly, he realized that he could measure the volume of any object by measuring how much water it displaces when completely submerged.

fabrics with cavities

Some natural or manufactured substances are hollow or liquid in their properties, but composed of particles large enough to leave voids between them, even when the substance is tightly packed. Some examples of the latter include sand, salt, flour, grain, snow and gravel. The empty space can be filled with air, water or other substances. It can also be empty, in which case there is a vacuum in the space between the particles. Density calculations for such substances can be done by mass, including voids, or by geometrically estimating the volume of voids and subtracting it from the total volume if the particles are relatively uniform in shape.

There are substances that can be more loosely or tightly packed and have more or less space between the particles, depending on how they were poured or packed to reach their current state. This makes density calculations difficult for them as it is more difficult to estimate the volume of the cavity.

Density of Common Substances

MaterialDensity, g/cm³
Water at 20°C0,998
Water at 4°C1000
gasoline / gasoline0,700
It's 0°C0,917
Gases at standard temperature and pressure
carbon monoxide0,00125
Carbon dioxide0,001977

density and mass

Composite materials are replacing metallic components in aircraft because they exhibit desirable physical properties, including light weight and high flexibility. All propellers on this Bombardier Q400 are composite.

In some industries, such as aerospace, using the lightest materials possible is critical. For the same volume, the lower the density of the material, the lower its mass. When the weight must remain low, low density materials are used. For example, the density of aluminum is around 2.7 g/cm³, while that of steel is between 7.75 and 8.05 g/cm³. For this reason, aluminum and its alloys are used in about 80% of the fuselages.

Composite materials are replacing metallic components in aircraft because they exhibit desirable physical properties, including light weight and high flexibility. All propellers on this Bombardier Q400 are composite.

Conceptual drawing of a black hole according toNASA.

black buracos

On the other hand, as the mass increases, the density also increases. Black holes are an example of very high density bodies because their mass is extremely large and their volume is negligible. Such conditions create an astronomical body that absorbs light and other objects, waves and particles that come close enough to it - the largest of which are called supermassive black holes.


This article was written byKateryna Jurij

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online unit converters Mechanic

Having trouble translating a unit of measurement into another language? Help is available!Ask your question on TCTermsand you will get a response from experienced technical translators within minutes.


Mechanicis the branch of physics that studies the behavior of physical bodies subjected to forces or displacements, and the subsequent effects of bodies on their surroundings.

density converter

Omass densitylubricantdensityof an object is a scalar value equal to its mass per unit volume. In other words, density is a measure of the relative "weight" of different objects of constant volume.

The SI unit for density is kilograms per cubic meter (kg/m³).

Using a Density Converter

This online unit converter allows you to quickly and accurately convert between multiple units of measure from one system to another. The Unit Conversion page is a solution for engineers, translators and anyone whose business involves working with quantities measured in different units.

Learn technical English with our videos!

You can use this online converter to convert hundreds of units (including metric, imperial and US) into 76 categories or thousands of pairs, including acceleration, area, electricity, energy, force, length, light, mass, mass flow, density, specifically volume, power, pressure, voltage, temperature, time, torque, velocity, viscosity, volume and capacity, volumetric flow, and more.
Observation:Integers (numbers without a decimal point or exponent) are considered accurate to 15 digits, and the maximum number of decimal places is 10.

In this calculator, E notation is used to represent very small or very large numbers.E notationis an alternate format of scientific notation to 10x. For example: 1,103,000 = 1,103 106= 1.103E+6. Here E (from the exponent) represents " 10^", which is "times ten to the power". Electronic notation is widely used in calculators and by scientists, mathematicians and engineers.

  • Select the unit to convert from the box on the left with the list of units.
  • Select the unit to convert from the box on the right with the list of units.
  • Enter a value (eg "15") on the leftZbooks.
  • The result is shown inResultsbox and wTo dobooks.
  • Alternatively, you can enter the value on the rightTo doin the field and read the conversion result from the fileZEUResultsboxes.

We work hard to ensure that the results returned by's converters and calculators are correct. However, we do not guarantee that our converters and calculators are error free. All content is provided "as is" without warranty of any kind.Terms of use.

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How do you calculate pounds per gallon from density? ›

This is all you need to convert from specific gravity to pounds per U.S. gallon. For example, the specific gravity of aluminum is 2.72, so its density is (2.72) • (8.345 lbs/U.S. gal) = 22.7 lbs/U.S. gal. In other words, if you have a U.S. gallon of aluminum, it will weigh 22.7 pounds.

What is the formula for density conversion? ›

Density is the measure of mass per unit of volume. For any given quantity of material (i.e. air, water, steel), density is calculated by dividing the mass of the material by the volume the material occupies (i.e. ρ = M/V), and is expressed in the units of the mathematical relationship (i.e. kg/m3, lb/ft3 etc.).

How do you convert US gallons to pounds? ›

1 Gallon = 8.34 Lbs.

How do you convert density to different units? ›

To convert between the two different units of density, we can divide or multiply by 1,000. To go from kilograms per cubic meter to grams per cubic centimeter, we divide by 1,000. And to go the other way, we multiply by 1,000.

How do you find weight with density calculator? ›

Look up the density of the material the object is made of in kg/m3. Measure the volume of the object in m3. Multiply the density by the volume. You will then have the mass of the object in kg.

What is the formula for weight density in fluid mechanics? ›

Since the density is constant, the weight can be calculated using the density: w=mg=ρVg=ρAhg.

How do you work out cubic volume? ›

Height × width × depth = volume

If the height, width and depth are measured in cm, the answer will be cm³.

How do you calculate US gallons? ›

  1. Formula:
  2. L x W x D. = Cubic Feet.
  3. Cubic ft x 7.47. = Gallons.

How much does a US gallon weigh in pounds? ›

A US gallon is equal to 8.34 pounds or 3.78 kilos when measured at 62°F (or 17°C). So there you have it – now you know the answer!

How much is 1 lb per gallon? ›

How many U.S. gallons are in one pound of water? 1 gal = 8.35 lb wt.

What is the formula for density units? ›

density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre.

What is the formula for calculating density and its units? ›

Density equals mass divided by volume.” Density is a compound measure which tells us about the mass of an object in relation to its volume. Density = mass ÷ volume = 500 ÷ 2.5 = 200 k g / m 3 .

What is the metric unit for calculating density? ›

The density of a substance is the ratio of the mass of a sample of the substance to its volume. The SI unit for density is the kilogram per cubic meter (kg/m3).

How do you calculate density examples? ›

Calculating densities of rocks and minerals
  1. Density is mass divided by volume, so that the density is 45 g divided by 15cm3, which is 3.0 g/cm3.
  2. Density is mass divided by volume, so that the density is 60 g divided by 30cm3, which is 2.0 g/cm3.
  3. In this case, you are asked for a mass, not the density.
Feb 17, 2023

How do you find the weight of a liquid with volume and density? ›

Example Problem
  1. mass = volume x density.
  2. mass = 30 ml x 0.790 g/ml.
  3. mass = 23.7 g.
Aug 29, 2022

How do you convert specific gravity to density? ›

Converting a specific gravity into a density is as simple as multiply the SG by the reference density for which it was based. In most cases, this is the density of water, and therefore your multiply the SG by 1 to yield your density in g/cm^3.

What is the relationship between weight and density? ›

The weight of an object is the force of gravity on the object and may be defined as the mass times the acceleration of gravity, w = mg. Since the weight is a force, its SI unit is the newton. Density is mass/volume.

What are the 4 steps to calculating density? ›

The five steps for determining density can be expressed in simple form as follows: measure the mass of the container, measure the volume of the liquid, measure the combined mass of the liquid and the container, determine the mass of the liquid alone and divide the mass by the volume.

How do you convert volume from density? ›

Mathematically, volume is given by the equation: volume = mass / density.

What is the volume of 1 cubic unit? ›

Discussion on Cubic Units

In geometry, the cubic units are the units that are measured in terms of volume. The volume of the unit cube where the length, width, and height are 1 unit each is 1 cubic unit.

What volume is a US gallon? ›

The US liquid gallon (frequently called simply "gallon") is legally defined as 231 cubic inches, which is exactly 3.785411784 litres.

How many gallons is a 48x18x18 tank? ›

65 Gallon Custom Aquarium, 48x18x18.

What is the equivalent of 1 US gallon? ›

One US gallon is equal to 3.785411784 liter.

How do you convert gallons to kilograms? ›

How to convert gallon to kg manually? For manual gallon to kg conversion, you may use the following formula: kg = gal × 3.7854 × density.

How many gallons is 35 pounds? ›

Wholesale Packaging Conversions
1 Gallon = 7.61 Pounds3 Liters = 6 Pounds
35 Lbs = 17.41 Liters5 Gallons = 38 Pounds
35 Lbs = 4.59 Gallons5 Gallons = 18.9 Liters
35 Lbs = 588.7 Ounces5 Gallons = 17.26 Kilograms
35 Lbs = 15.9 Kilograms5 Gallons = 640 Ounces
4 more rows
Apr 6, 2018

How much does a US gallon weigh? ›

A US gallon is 8.34 lbs or 3.78 kg. Question: How much does a gallon of water weigh? Answer: A US gallon of water weighs 8.34 lbs or 3.78 kg at 62 °F (17 °C). An imperial gallon (UK) weighs 10.022 lbs or 4.546 kg, at its most dense temperature, which is 2.20456 lbs / L at 4 °C or 39 °F.

How many pounds is half a gallon? ›

A half-gallon of milk weighs approximately 4.23 lb (1.92 kg).

How many pounds is 1 gallon of milk converted to? ›

One quart of milk weighs 2.15 lbs. One gallon of milk weighs 8.6 lbs.

How many pounds is a 1 gallon jug of milk? ›

A gallon of milk weighs 8.6 lb, and a quart of milk weighs 2.15 lb.

How do you calculate pounds per gallon from specific gravity? ›

An easier way to convert from specific gravity to lb/gal is to remember that the SpG of water = 1. Water is (roughly) 8.34 lb/gal. So, just multiply the SgG that you're given (1.31 in this case) times 8.34, and you get 10.925 lb/gal, or 10.93...

What is the density of water in pounds per gallon? ›

So, how much does water actually weigh? There are a few variables, such as temperature, that determine the weight of water, but for all practical purposes in waterworks mathematics, water weighs 8.34 pounds per gallon. The density (mass per unit volume) of water is 1.00.

How many pounds per gallon is fuel density? ›

And, if you want to be practical about it, remember that gasoline weighs about 6 pounds per gallon, about 25% lighter than water.

What is calculating the weight formula? ›

To calculate the weight, use the following general formula: W = mg. Here, “W” is the weight of the object, “m” is the mass of the object, and “g” is the acceleration due to gravity.

How many gallons in a pound calculator? ›

Conversely, if you want to convert 1 pound to gallons, a pound of water is equivalent to that of 0.12 gallons.

What is the conversion from density to specific gravity? ›

Specific gravity (or Relative Density) of a substance = Density of substance Density of Fresh Water Or, S G ( o r R D ) = D ( in kg/m 3 ) 1000 kg/m 3 = D ( in t/m 3 ) 1 t/m 3 Specific Gravity is a unitless quantity.

What is the formula for volume of specific weight? ›

The specific volume is the reciprocal of the density of the material, which is the mass per unit volume: r = (1/v) = (m/V). The "Specific Gravity" of a substance is the ratio of its mass to that of an equal volume of water at the same temperature and pressure.

What is 1 gallon density? ›

Common Density Units
pound/gallon (UK)99.78
ounce/cubic inch [oz/in3]1,730
ounce/cubic foot [oz/ft3]1.001
ounce/gallon (US)7.489
14 more rows

How do you calculate water density? ›

Just like a solid, the density of a liquid equals the mass of the liquid divided by its volume; D = m/v. The density of water is 1 gram per cubic centimeter. The density of a substance is the same regardless of the size of the sample.

How do you convert water density? ›

It's no coincidence that water has a density of 1.

Density is mass divided by volume (ρ=m/v), and water was used as the basis for establishing the metric unit of mass, which means a cubic centimeter (1cm3) of water weighs one gram (1g). So, 1g/1cm3 = 1 g/cm3, giving water its easy-to-remember density.


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