Grams to Tonnes (g to t) Converter & Formula
1 gram equals 0.000001 tonnes — divide the number of grams by 1,000,000 (or multiply by 0.000001) to convert to metric tonnes. A tonne is a very large unit, so grams give a tiny decimal. ByteTools applies the exact factor as you type.
The formula
To convert grams to tonnes, multiply by 0.000001 (1 × 10^-6):
t = g × 0.000001
For example, 500 grams × 0.000001 = 0.0005 tonnes. To reverse it, multiply tonnes by 1,000,000.
Conversion table
| Grams (g) | Tonnes (t) |
|---|---|
| 1 | 0.000001 |
| 2 | 0.000002 |
| 5 | 0.000005 |
| 10 | 0.00001 |
| 25 | 0.000025 |
| 50 | 0.00005 |
| 100 | 0.0001 |
| 500 | 0.0005 |
| 1000 | 0.001 |
| 1000000 | 1 |
How to convert online
- Type the number of grams into the first box.
- Read the tonnes result instantly in the second box.
- Type a tonne value instead to convert back to grams — it works both ways.
Use the Gram to Tonne Converter — free and instant in your browser.
Where this conversion is used
Grams-to-tonne conversions appear in bulk manufacturing, agriculture, freight and mining, where lab-scale samples measured in grams must be scaled up to production tonnages. Since a tonne is a million grams, the tiny factor keeps large-scale estimates accurate.
FAQ
How many tonnes are in a gram?
One gram equals 0.000001 tonnes. So 1,000 grams is 0.001 tonnes and 1,000,000 grams is 1 tonne.
What is the formula to convert grams to tonnes?
Multiply grams by 0.000001, or divide by 1,000,000: t = g / 1000000. The converter does this automatically.
How do I convert tonnes back to grams?
Multiply tonnes by 1,000,000. For example, 2 tonnes = 2,000,000 grams.
How many grams are in a tonne?
Exactly 1,000,000 grams make one metric tonne, which equals 1,000 kilograms.
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