Updated September 2026

Quick Answer: Multiply ounces by 0.0283495 to get kilograms. So 16 oz = 0.4536 kg (≈ 1 lb), 32 oz = 0.9072 kg, and 100 oz = 2.835 kg. The formula is: kg = oz × 0.0283495.

WEIGHT & MASS

Ounce to Kilogram

Instantly convert ounce to kilogram with fast, accurate, real-time results.

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Formula & methods
Formula diagram
Common oz-to-kg values
US package sizes in kg
Nutrition labels: oz vs g vs kg
Full conversion table (1–100 oz)
FAQs

Ounces (oz) are the standard weight unit in US food packaging and recipes, while kilograms (kg) are used almost everywhere else in the world. Converting between them is common when cooking from international recipes, reading import labels, or tracking intake with a European nutrition app.

For related conversions, see our kg to oz converter, ounces to grams converter, and ounces to lbs converter.

Formula & Methods

There are two equivalent ways to convert oz to kg:

Method 1 — Multiply: kg = oz × 0.0283495
Method 2 — Divide: kg = oz ÷ 35.274
Example: 16 oz × 0.0283495 = 0.4536 kg

Both methods give the same result. Method 1 (multiply by 0.0283495) is easier on a calculator. Method 2 (divide by 35.274) is intuitive because it mirrors the kg-to-oz conversion factor of 35.274 oz/kg.

Formula at a Glance

Common oz-to-kg Values

Ounces (oz)	Kilograms (kg)	Grams (g)	Context
1 oz	0.0283 kg	28.35 g	Slice of bread, letter
2 oz	0.0567 kg	56.7 g	Small chocolate bar
4 oz	0.1134 kg	113.4 g	Butter block (¼ lb), small apple
6 oz	0.1701 kg	170.1 g	Canned tuna (drained), large egg
8 oz	0.2268 kg	226.8 g	Standard burger patty, block of cheese
12 oz	0.3402 kg	340.2 g	Can of soup, small pasta serving
16 oz (1 lb)	0.4536 kg	453.6 g	Box of spaghetti, pound of ground beef
24 oz	0.6804 kg	680.4 g	Large pasta sauce jar, steak
32 oz (2 lbs)	0.9072 kg	907.2 g	Greek yogurt tub, ricotta container
48 oz (3 lbs)	1.3608 kg	1360.8 g	Large peanut butter jar

US Package Sizes in Kilograms

US food labels list weight in ounces; here is what those numbers mean in metric:

Package (oz)	Kilograms	Grams	Product type
3.5 oz	0.099 kg	99 g	Granola bar, protein bar
6 oz	0.170 kg	170 g	Individual yogurt, tuna can
10 oz	0.283 kg	283 g	Frozen veggie bag (small)
12 oz	0.340 kg	340 g	Pasta, small coffee bag
16 oz	0.454 kg	454 g	Standard pasta, deli meats
24 oz	0.680 kg	680 g	Oatmeal canister, pasta sauce
32 oz	0.907 kg	907 g	Ricotta, peanut butter (medium)
64 oz	1.814 kg	1814 g	Large juice bottle, detergent
80 oz	2.268 kg	2268 g	Bag of flour or sugar (5 lb bag)

Nutrition Labels: oz vs g vs kg

US FDA nutrition labels use grams for per-serving weights, but package totals are often shown in ounces. International labels use grams or kilograms. Here's a quick reference:

Shown on label	System	What it means
Net Wt. 16 oz (454 g)	US dual-label	0.454 kg — standard practice in the US
400 g	EU / international	14.11 oz — common for European pasta, canned goods
1 kg	Metric	35.27 oz — flour, sugar, rice in metric countries
Serving: 28 g	FDA serving size	0.99 oz — 1 oz per serving (cereal, chips)
Serving: 56 g	FDA serving size	1.98 oz — 2 oz per serving (pasta, crackers)

Fluid ounces vs weight ounces: This converter handles weight ounces (avoirdupois oz) only. Fluid ounces measure volume, not weight — see our fluid oz to mL converter for those.

Full Conversion Table: 1–100 oz to kg

oz	kg	oz	kg	oz	kg	oz	kg
1	0.0283	26	0.7371	51	1.4458	76	2.1545
2	0.0567	27	0.7654	52	1.4742	77	2.1829
3	0.0850	28	0.7938	53	1.5025	78	2.2113
4	0.1134	29	0.8221	54	1.5309	79	2.2396
5	0.1417	30	0.8505	55	1.5592	80	2.2680
6	0.1701	31	0.8788	56	1.5876	81	2.2963
7	0.1984	32	0.9072	57	1.6159	82	2.3247
8	0.2268	33	0.9355	58	1.6443	83	2.3530
9	0.2551	34	0.9639	59	1.6726	84	2.3814
10	0.2835	35	0.9922	60	1.7010	85	2.4097
11	0.3118	36	1.0206	61	1.7293	86	2.4381
12	0.3402	37	1.0489	62	1.7577	87	2.4664
13	0.3685	38	1.0773	63	1.7860	88	2.4948
14	0.3969	39	1.1056	64	1.8144	89	2.5231
15	0.4252	40	1.1340	65	1.8427	90	2.5515
16	0.4536	41	1.1623	66	1.8711	91	2.5798
17	0.4819	42	1.1907	67	1.8994	92	2.6082
18	0.5103	43	1.2190	68	1.9278	93	2.6365
19	0.5386	44	1.2474	69	1.9561	94	2.6649
20	0.5670	45	1.2757	70	1.9845	95	2.6932
21	0.5953	46	1.3041	71	2.0128	96	2.7216
22	0.6237	47	1.3324	72	2.0412	97	2.7499
23	0.6520	48	1.3608	73	2.0695	98	2.7783
24	0.6804	49	1.3891	74	2.0979	99	2.8066
25	0.7087	50	1.4175	75	2.1262	100	2.8350

Frequently Asked Questions

How many oz are in 1 kg?

One kilogram equals 35.274 ounces. Working backwards, 1 oz = 1 ÷ 35.274 = 0.0283495 kg. This is the exact definition from the international avoirdupois system.

What is 16 oz in kg?

16 oz × 0.0283495 = 0.4536 kg. This makes sense because 16 oz = 1 lb, and 1 lb = 0.453592 kg (the exact definition).

How do I convert oz to kg without a calculator?

Divide by 35 as a mental shortcut (1% under actual, small error for everyday use). For 32 oz: 32 ÷ 35 ≈ 0.914 kg (exact is 0.907 kg). For greater accuracy, use the table above or the calculator at the top of this page.

What is 3.5 oz in grams and kilograms?

3.5 oz × 28.3495 = 99.2 g, which is 0.0992 kg. You'll see "3.5 oz / 99 g" on many single-serve snack packages — it's very close to 100 g.

Is 28 oz close to 1 kg?

Not quite — 28 oz = 28 × 0.0283495 = 0.7938 kg, about 79% of a kilogram. To get 1 kg you need 35.274 oz.

What is 64 oz in kg?

64 oz × 0.0283495 = 1.814 kg. A 64-oz (half-gallon) container of liquid weighs approximately 1.81 kg if it's water (since 1 fl oz of water ≈ 1 weight oz).

Sources

Related Weight Converters

kg → ozKilograms to ounces oz → gOunces to grams g → ozGrams to ounces kg → lbsKilograms to pounds lbs → ozPounds to ounces oz → lbsOunces to pounds

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Ounces to Kilograms Converter (oz to kg)