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Ounce to Tonne Converter

Type a value — the answer appears instantly. 1 oz = 0.0000283495 t.

Reviewed by the OmniCalc teamMethod verified 2026-07-01

From unit

To unit
Result

0.0000283495 tonnes

= 0.0283495 kg= 0.0625 lb

equals 0.0000283495 tonnes

Formula: t = oz × 0.000028349523

Ounce to Tonne formula

t = oz × 0.000028349523

Convert 5 ounces to tonnes

  1. Start with 5 ounces.
  2. Multiply by the conversion factor: 5 × 0.0000283495 = 0.000141748.
  3. So 5 oz = 0.000141748 t.

Ounce to Tonne conversion table

Ounce to Tonne conversion table
Ounces (oz)Tonnes (t)
0.01 oz0.0000002835 t
0.1 oz0.000002835 t
0.25 oz0.0000070874 t
0.5 oz0.0000141748 t
1 oz0.0000283495 t
2 oz0.000056699 t
3 oz0.0000850486 t
4 oz0.000113398 t
5 oz0.000141748 t
6 oz0.000170097 t
7 oz0.000198447 t
8 oz0.000226796 t
9 oz0.000255146 t
10 oz0.000283495 t
15 oz0.000425243 t
20 oz0.00056699 t
25 oz0.000708738 t
30 oz0.000850486 t
40 oz0.00113398 t
50 oz0.00141748 t
75 oz0.00212621 t
100 oz0.00283495 t
250 oz0.00708738 t
500 oz0.0141748 t
1,000 oz0.0283495 t
5,000 oz0.141748 t
10,000 oz0.283495 t

Unit definitions

What is a ounce?

The avoirdupois ounce is one sixteenth of a pound, about 28.35 grams. It is common in the United States for food portions, packaged goods, and postal weights. It should not be confused with the troy ounce used for precious metals.

What is a tonne?

The tonne, or metric ton, is exactly 1000 kilograms. It is used worldwide for heavy freight, vehicle mass, industrial materials, and carbon-emission accounting. It is distinct from the US short ton and the UK long ton.

Frequently asked questions

How many tonnes are in one ounce?

One ounce equals 0.0000283495 tonnes (1 oz = 0.0000283495 t).

How do I convert ounces to tonnes?

Multiply the value in ounces by 0.0000283495. For example, 10 oz × 0.0000283495 = 0.000283495 t.

Which is bigger — a ounce or a tonne?

A tonne is bigger: one tonne contains 35,274 ounces.

Is this ounce to tonne converter free?

Yes — the converter is free, works offline once loaded, and computes instantly in your browser without sending your numbers to a server.

Conversion factors follow international definitions (SI / NIST). Last verified 2026-07-01.