kg to oz Converter – Kilograms to Ounces (and Back)

How to convert kilograms to ounces

The kilogram (kg) is the SI base unit of mass. The ounce (oz) is a non‑SI unit used mainly in the United States for everyday weights like food or packages.

By definition:

To convert kilograms to ounces, multiply by this factor:

Example: 2 kg to oz

1. Write the formula: oz = kg × 35.27396195
2. Substitute: oz = 2 × 35.27396195
3. Calculate: oz ≈ 70.5479

So 2 kg ≈ 70.55 oz (rounded to two decimal places).

How to convert ounces to kilograms

To go the other way, divide by the same conversion factor:

Example: 16 oz to kg

1. Use the inverse formula: kg = oz ÷ 35.27396195
2. Substitute: kg = 16 ÷ 35.27396195
3. Calculate: kg ≈ 0.4536

So 16 oz ≈ 0.4536 kg.

Approximate mental math shortcuts

• 1 kg ≈ 35 oz (slight under‑estimate).
• 0.5 kg ≈ 18 oz (actually ≈ 17.64 oz).
• 100 g ≈ 3.5 oz (since 0.1 kg × 35.27 ≈ 3.53 oz).

For quick estimates, these are usually accurate enough for cooking or everyday use. For precise work, use the exact factor in the calculator.

Frequently asked questions

How many ounces are in 1 kg?

There are about 35.27 ounces in 1 kilogram. More precisely:

Is this calculator using regular ounces or troy ounces?

This tool uses the avoirdupois ounce (the regular ounce used for food, body weight, and most everyday items), where:

• 1 avoirdupois ounce ≈ 28.3495 g
• 1 troy ounce ≈ 31.1035 g (used mainly for precious metals)

If you are working with gold, silver, or other precious metals, be sure to use a dedicated troy ounce converter instead.

When should I use kilograms vs ounces?

• Kilograms – scientific work, international trade, most countries’ food labels.
• Ounces – recipes, mail and shipping, and body weight in the US (often combined with pounds).

For technical or international contexts, kilograms are usually preferred. For US‑based everyday contexts, ounces and pounds are common.