Convert gram [g] to atomic mass unit [u] • Mass Converter • Common Unit Converters • Compact Calculator • Online Unit Converters (2024)

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Overview

Mass is a measure of the resistance of the object to acceleration. It is an inherent property of the object, contrast to weight, which depends on the gravitational field of the planet, where the object is located. If the force applied to the object and its acceleration are known, we can calculate mass m using Newton’s second law of motion: F = ma, where F is the force and a is the acceleration.

Mass vs. Weight

In everyday use, the words “mass” and “weight” are often equivalent, both referring to mass. In physics, weight refers to the force that acts on an object and is calculated as a product of mass and g, the gravitational acceleration that differs depending on the astronomical object, which creates the gravitational field that the object is affected by. For example, in the case of Earth, g = 9.80665 m/s², and for the Moon it is about six times less, approximately 1.63 m/s². Thus, an object with a mass of one kilogram weights approximately 9.8 newtons (N) on the Earth, and 1.63 N on the Moon.

Gravitational Mass

Gravitational mass refers to the measure of the gravitational force experienced by the object (passive) or deployed by it (active). When active gravitational mass increases, the gravitational field of the object becomes stronger. The gravitational field is what keeps the astronomical objects in place and determines the structure and the layout of the Universe. Tides are also caused by the interaction between the gravitational forces of the Moon and the Earth.

Passive gravitational mass measures the effect of the gravitational field of another body on an object. An increase in the weight of the object increases its passive gravitational mass.

Inertial Mass

The inertial mass of an object is the property of resisting the change in this object’s motion. It represents the degree of resistance of the object to being accelerated. Newton’s second law of mechanics refers to inertial mass. Gravitational mass and inertial mass are equivalent.

Mass and Relativity

Units

Kilogram

The SI unit of mass is a kilogram, which is defined by taking the fixed numerical value of the Planck constant h to be 6.62607015×10⁻³⁴ when expressed in the unit Js, which is equal to kgm²s⁻¹, where the meter and the second are defined in terms of c and Δν_Cs. Multiples of kilogram are also commonly used, such as a gram (1/1000 of a kilogram) and a tonne (1000 kilograms).

Electronvolt

Electronvolt is a unit of energy and can be described by the formula E=mc², where E represents energy, m stands for mass, and c is the speed of light. According to mass-energy equivalence, electronvolt is also used as a unit of mass within the natural units system where C is equal to 1. This unit is often used in particle physics.

Atomic Mass Unit

Atomic mass units (u) are used to measure mass of molecules and atoms. 1 u is 1/12 of a mass of an atom of carbon-12. It is about 1.66 × 10⁻²⁷ kilograms.

Slug

The slug is a unit of mass used in the imperial system, mainly in the UK. 1 slug is defined as a mass that accelerates by 1 foot per second squared when one pound-force is applied to it. It is about 14.59 kilograms.

Solar Mass

The solar mass is used in astronomy to measure masses of astronomical objects such as stars, planets, and galaxies. 1 unit of solar mass equals the mass of the Sun, which is about 2 × 10³⁰ kilograms. The Earth is about 332,946 times smaller than that.

Carat

In jewelry, the mass of gemstones and metals is measured in carats, where one carat is 200 milligrams. It originally referred to the weight of a carob seed and customers would often carry their own seeds to use when dealing with merchants of precious metals, to ensure accuracy of the transaction. The weight of a gold coin in ancient Rome was defined as 24 carob seeds, and as a result, carats also became an indication of the purity of gold, with 24 carats being gold-only, 12 carats being an alloy of half-gold, and so on.

Grain

The grain is a unit of mass used across the world from the Bronze Age into the Renaissance. It is equivalent to the weight of a grain of commonly grown cereals at the time, such as barley, or about 64.798 milligrams. It is a little more than a quarter of a carat. It was previously used in jewelry to measure gemstones before the carat was adopted. Currently, it is used in weaponry for measuring the mass of gunpowder, bullets, and arrows. It is also used in dentistry to measure the mass of gold foil.

Other Units of Mass

Some imperial units of mass include pounds, stones, and ounces, commonly used in the UK, USA, and Canada. 1 pound equals 453.59237 grams. Stones are used to measure people’s weight. 1 stone is about 6.35 kilograms or exactly 14 pounds. Ounces are often used in cooking, especially with ingredients in small quantities. 1 ounce is 1⁄16 of a pound and about 28.35 grams. In Canada, many products are sold in imperial sizes and at the same time labeled in metric units as shown in this picture. This is known as “soft metric” as opposed to a “hard metric” system where packages are sold in round metric numbers. Unlike these soft metric packages, in a hard metric system soda crackers might come in a 500 g package and green peas in a 400 mL can.

References

This article was written by Kateryna Yuri

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Mass Converter

In physics, mass, or more specifically inertial mass, is defined as a quantitative measure of an object’s resistance to acceleration. Gravitational mass is defined as the property of a body that causes it to have weight in a gravitational field. It can also be described as a measure of the magnitude of the gravitational force which is exerted by an object, or experienced by an object when interacting with a second object.

The International System of Units (SI) unit of mass is the kilogram (kg). The kilogram is the base unit of mass in the International System of Units and is defined by taking the fixed numerical value of the Planck constant h to be 6.62607015×10⁻³⁴ when expressed in the unit Js, which is equal to kgm²s⁻¹, where the meter and the second are defined in terms of c and Δν_Cs. The kilogram is almost exactly equal to the mass of one liter of water. The CGS system unit of mass is the gram.

Using the Mass Converter Converter

This online unit converter allows quick and accurate conversion between many units of measure, from one system to another. The Unit Conversion page provides a solution for engineers, translators, and for anyone whose activities require working with quantities measured in different units.

You can use this online converter to convert between several hundred units (including metric, British and American) in 76 categories, or several thousand pairs including acceleration, area, electrical, energy, force, length, light, mass, mass flow, density, specific volume, power, pressure, stress, temperature, time, torque, velocity, viscosity, volume and capacity, volume flow, and more.
Note: Integers (numbers without a decimal period or exponent notation) are considered accurate up to 15 digits and the maximum number of digits after the decimal point is 10.

In this calculator, E notation is used to represent numbers that are too small or too large. E notation is an alternative format of the scientific notation a · 10^x. For example: 1,103,000 = 1.103 · 10⁶ = 1.103E+6. Here E (from exponent) represents “· 10^”, that is “times ten raised to the power of”. E-notation is commonly used in calculators and by scientists, mathematicians and engineers.

• Select the unit to convert from in the left box containing the list of units.
• Select the unit to convert to in the right box containing the list of units.
• Enter the value (for example, “15”) into the left From box.
• The result will appear in the Result box and in the To box.
• Alternatively, you can enter the value into the right To box and read the result of conversion in the From and Result boxes.

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