Ounces to Tonnes Converter
Common Conversions
| oz | t |
|---|---|
| 1 | 0.0000284 |
| 10 | 0.000284 |
| 100 | 0.00284 |
| 1000 | 0.02835 |
| 5000 | 0.14175 |
| 10000 | 0.2835 |
| 16000 | 0.45359 |
| 35274 | 1 |
| 50000 | 1.4175 |
| 100000 | 2.835 |
| 500000 | 14.175 |
| 1000000 | 28.35 |
Why this conversion matters in chemistry
Take precious-metals supply-chain accounting. A catalysis R&D group tracks Pt sponge consumption in oz at the per-batch scale (1–10 oz per hydrogenation campaign); the global Pt market reports annual mine production in tonnes (about 180 t/year). A 50 oz inventory drawdown is 0.00142 t — a PGM recovery audit attributes against the global supply-chain accounting. The constant of 2.835 × 10⁻⁵ t per oz comes from the avoirdupois ounce (28.3495 g) divided by 10⁶ for the kilo-prefix scale-up to metric tonnes.
Formula
tonnes = oz × 0.00002835
Worked Examples
35274 oz = 1 t
Exactly one metric tonne in ounces — the conversion anchor in reverse.
1 oz = 0.00002835 t
One ounce in metric tonnes — useful as a quick mental anchor.
16 oz = 0.000454 t
Exactly one pound in metric tonnes.
100 oz = 0.002835 t
100 oz — about a small-batch reagent inventory in tonne form.
Frequently Asked Questions
How do I convert ounces to tonnes?
Multiply by 0.00002835, or equivalently divide by 35,274. So 35,274 oz becomes exactly 1 metric tonne. The factor is exact through the avoirdupois pound definition.
How many ounces in a metric tonne?
Exactly 35,274 — comes from 1000 kg × 35.274 oz/kg. The figure links the metric and US-customary mass scales at the larger end.
When does this conversion show up?
Environmental sampling where many small ounce-weight samples aggregate into tonne-scale totals, or US product-weight reporting that needs to land in international commodity-market tonnage. The conversion lives at the boundary between per-batch lab work and global supply-chain accounting.