Tonne to Gram Converter (t to g)
1 tonne equals 1,000,000 grams — multiply the number of tonnes by 1,000,000 to convert to grams. A metric tonne is 1000 kilograms, and each kilogram is 1000 grams, so a tonne is a million grams.
The formula
To convert tonnes to grams, multiply by the exact factor 1,000,000:
g = t × 1000000
For example, 3 t × 1000000 = 3000000 g. To reverse it, divide grams by 1,000,000.
Conversion table
| Tonnes (t) | Grams (g) |
|---|---|
| 1 | 1000000 |
| 2 | 2000000 |
| 3 | 3000000 |
| 5 | 5000000 |
| 10 | 10000000 |
| 25 | 25000000 |
| 50 | 50000000 |
| 100 | 100000000 |
| 250 | 250000000 |
| 500 | 500000000 |
| 1000 | 1000000000 |
How to convert online
Type the number of tonnes in the first box and read the grams instantly in the second. Enter a gram value instead to convert back — it works both ways — then copy the result or scan the reference table.
Use the Tonne to Gram Converter — free and instant in your browser.
Where this conversion is needed
Crossing six orders of magnitude, tonne-to-gram conversions are useful in science, manufacturing and logistics when a bulk mass in tonnes must be expressed in grams — for instance yield-per-gram calculations, material composition, or reconciling lab-scale figures with shipment weights.
FAQ
How many grams are in a tonne?
One tonne equals 1,000,000 grams. Multiply tonnes by 1,000,000, so 10 t = 10,000,000 g.
What is the formula to convert tonnes to grams?
g = t × 1000000. The converter applies this exact factor automatically.
How do I convert grams back to tonnes?
Divide by 1,000,000. So 5,000,000 g = 5 t.
Is the conversion exact?
Yes — the metric tonne is defined as exactly 1,000,000 grams, so the conversion is precise with no rounding.
Related converters
- Gram to Tonne Converter
- Tonne to Kilogram Converter
- Tonne to Milligram Converter
- Tonne to Pound Converter
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Recommended reading
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