1 oz = 2.8350 × 10^−5 t (ounce → metric ton)
1 oz = 2.8350 × 10^−5 t
1 ounce equals 2.8350 × 10^−5 metric tons. To convert ounces to metric tons, multiply the ounce value by 2.8350 × 10^−5. For quick reference: 1 oz = 2.8350 × 10^−5 t, 5 oz = 0.000141748 t, 10 oz = 0.000283495 t, 100 oz = 0.00283495 t.
Metric tons = Ounces × 2.8350 × 10^−5Avoirdupois ounces to metric tonnes multiplies by 0.000028349523125 (28.349523125 g per oz, then ÷ 1 000 000). 35 273.96 oz make one tonne; a 16 oz item contributes 0.000453592 t. The conversion is aggregation arithmetic: per-unit ounce weights on US packaging summed into a metric shipping total. Do the multiplication with the full factor and round only the final tonne figure — rounding each ounce entry first compounds across thousands of line items and can shift a container's declared weight.
This is almost never a practical day-to-day conversion, but it appears in supply-chain spreadsheets that aggregate thousands of small US-labelled retail units (each specified in ounces) into a bulk tonnage figure for a shipping manifest — 16 oz is 0.000454 t, 1,000 oz is 0.02835 t, and 100,000 oz is 2.835 t. Given the six-order-of-magnitude gap, always sum ounces first and convert once at the end rather than converting each line item individually, to avoid compounding rounding error.
Start with your value in ounces.
Multiply the ounce value by 2.8350 × 10^−5. This is the exact conversion factor from ounces to metric tons.
The product is your value in metric tons. For example, 5 oz × 2.8350 × 10^−5 = 0.000141748 t.
The exact factor from ounces to metric tons is 2.8350 × 10^−5.
Metric tons = Ounces × 2.8350 × 10^−5
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Ounces (oz) | Metric tons (t) |
|---|---|
| 0.1 oz | 2.8350 × 10^−6 t |
| 0.25 oz | 7.0874 × 10^−6 t |
| 0.5 oz | 1.4175 × 10^−5 t |
| 1 oz | 2.8350 × 10^−5 t |
| 1.5 oz | 4.2524 × 10^−5 t |
| 2 oz | 5.6699 × 10^−5 t |
| 2.5 oz | 7.0874 × 10^−5 t |
| 3 oz | 8.5049 × 10^−5 t |
| 4 oz | 0.0001134 t |
| 5 oz | 0.00014175 t |
| 6 oz | 0.0001701 t |
| 7 oz | 0.00019845 t |
| 8 oz | 0.0002268 t |
| 9 oz | 0.00025515 t |
| 10 oz | 0.0002835 t |
| 12 oz | 0.00034019 t |
| 15 oz | 0.00042524 t |
| 18 oz | 0.00051029 t |
| 20 oz | 0.00056699 t |
| 25 oz | 0.00070874 t |
| 30 oz | 0.00085049 t |
| 35 oz | 0.00099223 t |
| 40 oz | 0.001134 t |
| 45 oz | 0.0012757 t |
| 50 oz | 0.0014175 t |
| 60 oz | 0.001701 t |
| 70 oz | 0.0019845 t |
| 75 oz | 0.0021262 t |
| 80 oz | 0.002268 t |
| 90 oz | 0.0025515 t |
| 100 oz | 0.002835 t |
| 120 oz | 0.0034019 t |
| 125 oz | 0.0035437 t |
| 150 oz | 0.0042524 t |
| 175 oz | 0.0049612 t |
| 180 oz | 0.0051029 t |
| 200 oz | 0.0056699 t |
| 225 oz | 0.0063786 t |
| 250 oz | 0.0070874 t |
| 275 oz | 0.0077961 t |
| 300 oz | 0.0085049 t |
| 350 oz | 0.0099223 t |
| 400 oz | 0.01134 t |
| 450 oz | 0.012757 t |
| 500 oz | 0.014175 t |
| 600 oz | 0.01701 t |
| 750 oz | 0.021262 t |
| 1000 oz | 0.02835 t |
| 2000 oz | 0.056699 t |
| 5000 oz | 0.14175 t |
A slice of bread is about 1 oz. A baseball weighs around 5 oz.
The avoirdupois ounce (oz) is a unit of mass in the imperial and US customary systems, defined as exactly 28.349523125 grams (1/16 of an avoirdupois pound). It is the standard small-mass unit in the United States for food packaging, recipes, and postal weights. Do not confuse it with the troy ounce (used for precious metals, 31.1035 g) or the fluid ounce (a volume).
The metric ton, or tonne (t), equals exactly 1,000 kilograms. It is the standard unit for industrial shipping, freight, and bulk commodities such as steel, grain, and cement. Despite the name, it is not part of the strict SI system (the SI name is the megagram), but it is universally accepted in commerce and engineering.
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