Ounces to Kilograms Converter (oz to kg)

How to convert ounces to kilograms

To convert ounces to kilograms, multiply the number of ounces by 0.02835 (or divide by 35.274).

Example: 50 oz = 1.417 kg.

Airline and postal limits are often listed in both units.

Common oz to kg conversions

0.5 oz = 0.01417 kg
1 oz = 0.02835 kg
2 oz = 0.0567 kg
3 oz = 0.08505 kg
3.5 oz = 0.09922 kg
4 oz = 0.1134 kg
6 oz = 0.1701 kg
8 oz = 0.2268 kg
11.5 oz = 0.32602 kg
12 oz = 0.34019 kg
14 oz = 0.39689 kg
16 oz = 0.45359 kg
32 oz = 0.90718 kg

Ounces to Kilograms conversion chart

oz	kg
0.25 oz	0.007087 kg
0.5 oz	0.01417 kg
0.75 oz	0.02126 kg
1 oz	0.02835 kg
1.5 oz	0.04252 kg
2 oz	0.0567 kg
2.5 oz	0.07087 kg
3 oz	0.08505 kg
3.5 oz	0.09922 kg
4 oz	0.1134 kg
4.5 oz	0.12757 kg
5 oz	0.14175 kg
6 oz	0.1701 kg
7 oz	0.19845 kg
8 oz	0.2268 kg
9 oz	0.25515 kg
10 oz	0.2835 kg
11 oz	0.31184 kg
11.5 oz	0.32602 kg
12 oz	0.34019 kg
13 oz	0.36854 kg
14 oz	0.39689 kg
15 oz	0.42524 kg
16 oz	0.45359 kg
18 oz	0.51029 kg
20 oz	0.56699 kg
24 oz	0.68039 kg
25 oz	0.70874 kg
30 oz	0.85049 kg
32 oz	0.90718 kg
35 oz	0.99223 kg
40 oz	1.134 kg
45 oz	1.276 kg
50 oz	1.417 kg
55 oz	1.559 kg
60 oz	1.701 kg
64 oz	1.814 kg
65 oz	1.843 kg
70 oz	1.984 kg
75 oz	2.126 kg
80 oz	2.268 kg
85 oz	2.41 kg
90 oz	2.551 kg
100 oz	2.835 kg
110 oz	3.118 kg
120 oz	3.402 kg
125 oz	3.544 kg
128 oz	3.629 kg
150 oz	4.252 kg
175 oz	4.961 kg
180 oz	5.103 kg
200 oz	5.67 kg
220 oz	6.237 kg
250 oz	7.087 kg
300 oz	8.505 kg
400 oz	11.34 kg
500 oz	14.175 kg
750 oz	21.262 kg
1,000 oz	28.35 kg

Metric vs. U.S. customary units

The United States uses U.S. customary units — inches, feet, miles, pounds, gallons and degrees Fahrenheit — for most everyday purposes. Canada officially adopted the metric system in the 1970s, so road signs, weather forecasts, gas pumps and food labels use kilometers, degrees Celsius, liters and grams. In practice many Canadians still use feet and inches for height, pounds for body weight and square feet for homes, which is why conversions come up constantly on both sides of the border.

Exact conversion factors

Since 1959 the inch, foot, yard, mile and pound have been defined in metric terms, so these conversions are exact, not approximations:

1 inch = 2.54 cm exactly, so 1 foot = 30.48 cm and 1 mile = 1.609344 km.
1 pound = 0.45359237 kg exactly; 1 ounce = 28.349523125 g.
1 U.S. gallon = 3.785411784 liters. The imperial gallon used in the U.K. is larger: 4.54609 liters.
1 acre = 4,046.8564224 m², and 1 hectare = 10,000 m² (about 2.471 acres).

Temperature is different because the scales have different zero points: °F = °C × 9/5 + 32 and °C = (°F − 32) × 5/9. Water freezes at 0 °C (32 °F) and boils at 100 °C (212 °F) at sea level, and −40 is the same in both scales.

Quick mental shortcuts

Kilometers to miles: multiply by 0.6 (100 km ≈ 60 miles; the exact figure is 62.1).
Kilograms to pounds: double it and add 10% (70 kg → 140 + 14 = 154 lb).
Celsius to Fahrenheit: double it and add 30 for a rough estimate (20 °C → 70 °F; the exact answer is 68 °F).
Liters to U.S. gallons: divide by 4 for a quick estimate (40 L ≈ 10 gallons; exactly 10.57).

Cooking and recipe conversions

U.S. recipes measure by volume — cups, tablespoons and teaspoons — while Canadian and most international recipes use milliliters and grams. A U.S. cup is about 237 mL, but Canadian "metric" measuring cups hold 250 mL, so the difference adds up in baking. For flour, sugar and butter, weighing in grams is more accurate than cups because the density of each ingredient differs.

Popular conversions

Pick a conversion below for a dedicated page with the formula, worked examples and a complete conversion chart.

Tips for accurate conversions

Keep full precision until the final step and round only the answer — rounding intermediate numbers can add noticeable errors, especially in recipes, construction and engineering. Always check which gallon, ounce or ton a source means: U.S. and imperial units share names but not sizes, and a "fluid ounce" measures volume while an "ounce" of weight measures mass. For temperatures, remember that a temperature difference converts differently from a temperature reading: a change of 10 °C equals a change of 18 °F, without adding 32.

Popular unit conversions

Frequently asked questions

How many centimeters are in an inch?

Exactly 2.54 centimeters. To convert inches to centimeters, multiply by 2.54; to convert centimeters to inches, divide by 2.54.

How do I convert kg to pounds?

Multiply kilograms by 2.20462. For example, 70 kg × 2.20462 = 154.3 lb.

What is the formula for Celsius to Fahrenheit?

Multiply by 9/5 (1.8) and add 32. For example, 25 °C × 1.8 + 32 = 77 °F.

Is a U.S. gallon the same as a Canadian gallon?

No. Canada sells gas by the liter, but when gallons are mentioned in Canada they are sometimes imperial gallons (4.546 L), which are about 20% larger than U.S. gallons (3.785 L).

How many square feet are in a square meter?

About 10.764 square feet. A 1,000 sq ft home is roughly 92.9 m².

Sources & methodology

This calculator was last reviewed on November 2, 2026. Figures are based on the following official and primary sources:

NIST – Handbook 44, Appendix C: General Tables of Units of Measurement

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