Tonnes to Grams
An instant tonnes-to-grams converter, with the formula and a reference table below.
| Tonnes | Grams |
|---|---|
| 1 t | 1000000 g |
| 2 t | 2000000 g |
| 3 t | 3000000 g |
| 5 t | 5000000 g |
| 10 t | 10000000 g |
| 25 t | 25000000 g |
| 50 t | 50000000 g |
| 100 t | 100000000 g |
How to use
- Enter a value in the Tonnes field.
- The Grams figure appears immediately — no button to press.
- Typing in the Grams field converts back to Tonnes the same way.
- Use the reference table for the values that come up most often.
Tonnes to Grams formula
The factor from tonnes to grams is 1000000.
g = t × 1000000
Why this factor: the tonne and the gram are both defined against the kilogram, so dividing one definition by the other gives 1000000 directly. Both definitions are set out in full below.
To go the other way, divide by 1000000 — or use the Grams to Tonnes converter, which is the same calculation reversed.
Worked example
Start with 150 t. Multiply by 1000000 to get 150000000 g.
150 t × 1000000 = 150000000 g
The converter above does this for any value you type, in either direction.
What is a tonne?
A tonne, or metric ton, is 1,000 kilograms — the standard unit for bulk freight and industrial quantities.
Definition: Exactly 1,000 kilograms. Accepted for use with SI but not itself an SI unit.
Where it is used: Shipping and freight, steel and cement output, vehicle masses, and carbon emissions accounting.
Worth knowing: Distinct from the US short ton (2,000 lb ≈ 907 kg) and the UK long ton (2,240 lb ≈ 1,016 kg).
What is a gram?
A gram is one thousandth of a kilogram, the everyday unit for food and small-object mass.
Definition: Exactly 0.001 kilogram by SI prefix definition.
Where it is used: Nutrition labels, recipes, postal rates, and laboratory weighing.
Tonnes vs Grams
The tonne and the gram belong to the same family of units, so converting between them is usually a matter of shifting a decimal point or applying a small whole-number factor.
Frequently asked questions
How many grams are in a tonne?
One tonne equals 1000000 grams.
What is the formula to convert tonnes to grams?
Multiply the number of tonnes by 1000000. To reverse it, divide by 1000000 instead.
How do I convert grams back to tonnes?
Divide by 1000000, which is the same as multiplying by 1e-06.
How many grams are in 10 tonnes?
10 t works out to 10000000 g.
Is there anything to watch out for with tonnes?
Distinct from the US short ton (2,000 lb ≈ 907 kg) and the UK long ton (2,240 lb ≈ 1,016 kg).
How is the tonne defined?
Exactly 1,000 kilograms. Accepted for use with SI but not itself an SI unit.