How do I convert Gram (g) to Kilogram (kg)?

1 g equals 0.001 kg using SI-based conversion and precise factors.

What is the formula to convert Gram (g) to Kilogram (kg)?

This is a linear unit conversion using a constant factor between units.

How can I share a direct g to kg result?

Use the shareable URL: https://measurecalc.com/convert/gram-to-kilogram

Convert Gram (g) to Kilogram (kg)

Q: Is Gram (g) to Kilogram (kg) conversion exact?

The result uses the defined conversion factors for these units; displayed values may be rounded.

Category: Mass

Value From To Precision

0.001 kg

1 g = 0.001 kg

Precision: 6 decimals; very small non-zero results use significant digits.

How to convert gram (g) to kilogram (kg)

Mass quantifies the amount of matter. The kilogram is defined by Planck’s constant, which anchors mass to fundamental physics. In practice, grams and pounds dominate everyday use—from recipes and parcels to body weight—while tonnes and long tons appear in logistics and industry.

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Quick conversion table

Handy values for Gram (g) to Kilogram (kg). Click a value to calculate that result.

Gram (g)	Kilogram (kg)
	0.001
	0.0005
	0.0025
	0.01

Conversion formula

Use the following formula:

Kilogram (kg) ≈ Gram (g) × 0.001

Convert mass from Gram (g) to Kilogram (kg) using a fixed unit ratio. Round only the final result.

Common mistakes

Confusing mass (lb) with force (lbf) in engineering contexts.
Mixing metric tonnes (t) with short/long tons.

Unit facts

Gram (g): A gram is 1/1000 of a kilogram; ubiquitous in cooking and chemistry.
Kilogram (kg): The kilogram is the SI base unit of mass; since 2019 defined by fixing Planck’s constant.

About Gram (g)

Gram (g)

Equals 1/1000 kg. Standard for recipes, nutrition labels, and lab reagents. Converts cleanly across the metric ladder without rounding traps.

History: Introduced with the original metric system after the French Revolution. Its use expanded with mass manufacturing and standardized packaging.

About Kilogram (kg)

Kilogram (kg)

SI base unit of mass defined by fixing Planck’s constant h. The definition anchors mass to quantum physics rather than an artifact. Used universally from commerce to high-precision science.

History: In 2019 the kilogram was redefined via h and the second; before that it referenced the International Prototype of the Kilogram (IPK) stored near Paris.

Frequently asked questions

How many Kilogram (kg) are in one Gram (g)?

1 Gram (g) equals 0.001 Kilogram (kg).

Is Gram (g) to Kilogram (kg) conversion exact?

Many unit conversions are exact by definition, while others use standardized conversion constants.

What is the fastest way to convert Gram (g) to Kilogram (kg)?

Enter a value in Gram (g), choose Kilogram (kg) as the target unit, and the calculator will instantly return the result.

Convert Gram (g) to other units

g → oz Ounce (oz)

Convert other units to Kilogram (kg)

lb → kg Pound (lb)
st → kg Stone (st)