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Conversion Formula:
Convert Ounce to Gram (oz to g) instantly with accurate, readable results.
Use our Mass Unit Converter to convert between grams, kilograms, pounds, ounces, and other weight units instantly. Designed for cooking, science, fitness, and engineering needs, this unit conversion tool offers accurate results between metric and imperial systems. Whether you’re tracking body weight, measuring ingredients, or handling heavy machinery, our mass unit conversion calculator has you covered.
Ounce (oz) — an imperial and US customary unit of mass
It is defined as exactly one sixteenth of an avoirdupois pound; since 1 lb = 0.45359237 kg exactly, 1 oz = 28.349523125 g exactly. Used in the United States and some other countries for measuring food, packages, precious metals, and everyday small masses.
- Symbol: oz
- System: Imperial and US customary unit for mass
- Exact relations: 1 oz = 1/16 lb = 28.349523125 g = 28,349.523125 mg
- Metric equivalents: 1 oz ≈ 28.3495 g ≈ 0.0283495 kg
- Typical examples: a slice of bread ~1 oz; a letter ~1 oz; a small bag of chips ~1 oz.
Gram (g) — a common SI unit of mass
It is defined as one thousandth of a kilogram, the SI base unit for mass; the kilogram is defined by fixing the Planck constant at exactly 6.62607015×10⁻³⁴ J·s. Used worldwide for measuring small amounts of mass in science, cooking, nutrition, medicine, commerce, and everyday life.
- Symbol: g
- System: SI unit for mass; decimal submultiple of the kilogram
- Exact relations: 1 g = 0.001 kg = 1000 mg
- Imperial equivalents (derived from 1 lb = 0.45359237 kg exactly): 1 g ≈ 0.03527396 oz ≈ 0.00220462 lb
- Typical examples: a paperclip ~1 g; a teaspoon of sugar ~4 g; a chocolate bar ~50 g.