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g to kg Converter

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Convert grams to kilograms with the SI relation 1 kg = 1,000 g. A 750 g loaf of bread is 0.75 kg; a 2,300 g newborn is 2.3 kg. Useful when grocery scales, kitchen scales or postal scales report grams but inventory, retail labels or shipping manifests need kilograms. Browser-local conversion.

Decimal places:

From (Metric, Gram)

Gram (g)

To (Metric, Kilogram)

Kilogram (kg)

Gram (g) → Kilogram (kg)

Quick reference table

Gram (g)	Kilogram (kg)
1 g	0.001 kg
2 g	0.002 kg
5 g	0.005 kg
10 g	0.01 kg
25 g	0.025 kg
50 g	0.05 kg
100 g	0.1 kg

Glossary

Gram (g)

A gram is one thousandth of a kilogram (1 g = 1000 mg = 0.001 kg). It is the everyday metric unit for cooking ingredients, postal weights, jewellery and small-package retail. One US nickel weighs 5 g; a standard letter envelope tops out at about 30 g for the lowest postage tier.

Kilogram (kg)

The kilogram is the SI base unit of mass, redefined in 2019 in terms of the Planck constant (h = 6.62607015×10⁻³⁴ J·s). One kilogram equals 1000 g, 2.20462 lb or 0.157 stone. It anchors all other metric mass units and is the standard for body weight, groceries, freight and scientific work in nearly every country.

Metric system (SI)

The metric system is a decimal system of measurement built around the kilogram for mass, the meter for length and the second for time, with multiples and submultiples expressed as powers of ten (milligram, gram, tonne). Adopted in France in 1799 and codified internationally as the International System of Units (SI) in 1960, it is now the official system in nearly every country and the standard in science.

Imperial / US Customary system

The imperial system is the historical English system of weights and measures whose mass units are the ounce, pound, stone and ton (16 oz = 1 lb, 14 lb = 1 stone, 2,000 lb = 1 US short ton). Codified by the British Weights and Measures Act of 1824 and aligned with US Customary by the 1959 international yard-and-pound agreement (1 lb = 0.45359237 kg exactly), it is still used in the United States and the United Kingdom for everyday weights.

Related tools

Kilograms to Grams

Convert kilograms to grams — 1 kg = 1000 g

Milligrams to Grams

Convert milligrams to grams — 1 mg = 0.001 g (1000 mg = 1 g)

Grams to Metric Tonnes

Convert grams to metric tonnes — 1 g = 1e-6 t

Weight & Mass Converter

Convert weight and mass — mg, g, kg, tonnes, ounces, pounds, stones, US tons