Convert Mass from Gram to Metric Tonne (g to mt)
Multiple conversions

Gram to Metric Tonne Conversion Formula

To convert from Gram (g) to Metric Tonne (mt), use the following formula:

Example

Let's convert 5 Gram (g) to Metric Tonne (mt).

Using the formula:

Therefore, 5 Gram (g) is equal to $0.000005$ Metric Tonne (mt).

What is a Gram (g)?

A gram (g) is a base unit of mass in the metric system. The plural form is grams.

Where Did the Gram Originally Come From?

The gram was initially defined in 1795 by the French National Convention.

Its first definition was based on the mass of one cubic centimeter of pure water at the temperature of its maximum density, which is approximately 4 degrees Celsius (4 °C).

This practical, water-based definition was a revolutionary step toward a standardized and universal system of measurement, moving away from the inconsistent and often confusing units of time.

Grams vs. Ounces: What's the Difference?

A gram is much smaller than an ounce, the standard unit of mass in the imperial and US customary systems.

One ounce equals approximately 28.35 grams, which is why grams are preferred for scientific work and for measuring small amounts, such as spices or medicine.

The metric system's decimal structure (for example, 1,000 grams in a kilogram) also makes calculations simpler than in the imperial system.

How Is the Gram Defined Today?

Although the gram was once tied to water, it's no longer linked to any physical object.

Since 2019, the kilogram — and therefore the gram — is defined by a fundamental constant, the Planck constant (h).

That shift makes the unit stable and reproducible in any properly equipped laboratory, without relying on the old International Prototype of the Kilogram.

What is a Metric Tonne (mt)?

A metric tonne, often called simply a tonne (symbol: t), is a standard unit of mass in the metric system.

It's commonly used around the world to measure heavy objects, especially in trade and industry.

So, how heavy is it?

• A metric tonne is exactly 1,000 kilograms.
• This is equal to about 2,204.6 pounds.

It's also equivalent to one million grams (10⁶ g), which is why it's sometimes called a megagram (Mg).

The Simple Link Between a Tonne and Water

A great way to visualize a metric tonne is to think of a cube of water.

Imagine a cube that's one meter on each side—one meter tall, one meter wide, and one meter long. If you were to fill that cube with pure water, its mass would be exactly one metric tonne (1,000 kilograms).

This simple and direct relationship between volume (1 m³) and mass (1 tonne) is a perfect example of what makes the metric system so logical and practical.

Tonne vs. Ton: What's the Difference?

The term "ton" can be confusing, as it refers to different units of weight depending on the location.

Understanding this distinction is crucial, especially in the context of international shipping.

• Metric Tonne (t): The standard international unit. It's 1,000 kg or 2,204.6 lbs.
• Short Ton (US Ton): Commonly used in the United States, equal to exactly 2,000 pounds (about 907.2 kilograms).
• Long Ton (UK Ton): A traditional British unit of weight, equal to 2,240 lbs (about 1,016 kg).

Key takeaway: A US short ton is roughly 10% lighter than a metric tonne, whereas a UK long ton is slightly heavier. Always specify the unit to prevent costly errors!

What is the metric system?

Gram to Metric Tonne Conversion Table

Here are some quick reference conversions from Gram (g) to Metric Tonne (mt):