Ounces to Tonnes (oz to t) Converter and Formula
1 ounce equals 0.00002834952 tonnes (2.834952e-5 t) — multiply the number of ounces by 0.00002834952 to convert. A metric tonne is 1,000,000 grams and an ounce is 28.349523 grams, so it takes roughly 35,274 ounces to make a single tonne.
The formula
To convert ounces to tonnes, multiply by 0.00002834952:
t = oz × 0.00002834952
For example, 1000 oz is 1000 × 0.00002834952 = 0.02834952 t. To reverse it, divide by 0.00002834952 (or multiply by 35,273.96195).
Conversion table
| Ounces (oz) | Tonnes (t) |
|---|---|
| 1 | 0.0000283495 |
| 2 | 0.0000566990 |
| 5 | 0.0001417476 |
| 10 | 0.0002834952 |
| 25 | 0.0007087381 |
| 50 | 0.0014174762 |
| 100 | 0.0028349523 |
| 250 | 0.0070873808 |
| 500 | 0.0141747616 |
| 1000 | 0.0283495231 |
How to convert online
- Type the number of ounces into the first box.
- Read the equivalent value in tonnes instantly in the second box.
- Or enter a tonne value to convert back to ounces — it works both ways.
Use the Ounce to Tonne Converter — free and instant in your browser.
Where this conversion is used
This is a scale-bridging conversion: ounces are a small everyday unit while tonnes measure bulk cargo, industrial materials and commodity shipments. It comes up when totalling many small ounce-based items into shipping weights, or when converting precious-metal or product quantities into metric tonnes for trade and logistics. Because a tonne is a million grams and an ounce only about 28 grams, the numbers are naturally lopsided: 10,000 oz is roughly 0.283 t and 100,000 oz is about 2.835 t. That is why ounce-to-tonne answers are tiny decimals until quantities run into the thousands. When you are aggregating large counts of small ounce-based items into a shipping manifest, keeping the full precision the converter below provides prevents rounding errors from compounding across the total.
FAQ
How many tonnes are in an ounce?
One ounce equals 0.00002834952 tonnes. Multiply the ounce value by 2.834952e-5, so 1000 oz = 0.02834952 t.
What is the formula to convert ounces to tonnes?
t = oz × 0.00002834952. For example, 100 oz = 0.0028349523 t.
How many ounces are in a tonne?
About 35,273.96 ounces make one metric tonne. Divide tonnes by 0.00002834952, or multiply by 35,273.96195.
Is the conversion exact?
Yes. It comes from the exact avoirdupois ounce (28.349523125 g) and the exact tonne (1,000,000 g).
Related converters
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Recommended reading
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