Convert Kilogram to Gram
Convert kilograms to grams instantly. 1 kilogram = 1000 gram — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Gram to Kilogram converter for the reverse conversion.
Units explained
Kilogram
The kilogram (kg) is the SI base unit of mass, defined by fixing the Planck constant h at 6.62607015E-34 J s.
From Greek 'khilioi' (thousand) plus 'gramma' (small weight).
The worldwide base unit of mass in science, commerce, and everyday life.
Adopted in 1795; redefined through the Planck constant on 20 May 2019.
Gram
The gram (g) equals one-thousandth of a kilogram.
From Late Latin 'gramma', a small weight or scruple.
The everyday metric unit for food, medicine, and small objects.
Defined in 1795 as the mass of one cubic centimeter of water at melting point.
Kilogram to Gram conversion formula
The relationship between kilograms and grams:
To convert kilograms to grams, multiply the value in kilograms by 1000. To reverse, multiply grams by 0.001.
How to use this converter
Type a value into the calculator. The result in grams updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Gram to Kilogram converter for the reverse direction.
Step-by-step: convert kilograms to grams
- Write down the value in kilograms (kg).
- Multiply that value by the factor 1000.
- The product is the equivalent value in grams (g).
- To reverse, multiply the gram value by 0.001.
Worked examples
Example 1 — Convert 1 kg to g:
1 × 1000 = 1000 g
Example 2 — Convert 100 kg to g:
100 × 1000 = 100000 g
Real-world example — Body height conversion (reverse direction)
You measure 1.75 kilograms tall and need to fill in a gym membership form or medical record that asks for height in grams. This is the most-used everyday length conversion in metric-using countries.
1.75 kg × 1000 = 1750 g
Real-world example — Pet and accessory dimensions
A 3-kilogram dog leash equals a tidy round value in grams. Pet-supply shopping frequently mixes the two units across product specifications.
3 kg × 1000 = 3000 g
Real-world example — Fabric and tailoring
One kilogram of fabric converts to a value in grams commonly used for seam allowances. Garment patterns frequently switch between the two units on a single instruction sheet.
1 kg × 1000 = 1000 g
Kilogram to Gram conversion table
Standard reference values for converting kilograms to grams:
| Kilogram [kg] | Gram [g] |
|---|---|
| 0.01 | 10 |
| 0.1 | 100 |
| 1 | 1000 |
| 2 | 2000 |
| 3 | 3000 |
| 4 | 4000 |
| 5 | 5000 |
| 10 | 10000 |
| 20 | 20000 |
| 30 | 30000 |
| 40 | 40000 |
| 50 | 50000 |
| 100 | 100000 |
| 500 | 500000 |
| 1000 | 1000000 |
Frequently asked questions
How many grams is 1 kilogram?
How do I convert kilograms to grams?
How do I convert grams back to kilograms?
How many grams is 100 kilograms?
Popular weight unit conversions
Convert Kilogram to other weight units
Show all Kilogram conversions
Metric / SI (17 units)
Avoirdupois (15 units)
Troy & Apothecary (10 units)
Indian / South Asian (6 units)
Scientific / Atomic (9 units)
Astronomical (4 units)
Biblical / Ancient (14 units)
Sources & references
Conversion factor (1 kg = 1000 g) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.