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Grams to kg Converter

Convert grams to kilograms and back — divide by 1,000. Everything runs instantly in your browser; nothing is uploaded.

Convert grams ⇄ kilograms

2.5 kg
2500 g = 2.5 kg (1 kg = 1,000 g (exact))

Formula: 2500 g ÷ 1000 = 2.5 kg

How the grams to kg conversion works

The converter applies kg = g ÷ 1,000. The SI prefix "kilo" means ×1,000, so the gram-to-kilogram step is just moving the decimal point three places: 1,000 g = 1 kg, 2,500 g = 2.5 kg. Going the other way, g = kg × 1,000.

Worked example: a recipe calling for 750 g of flour is 750 ÷ 1,000 = 0.75 kg — three-quarters of a kilo. A 1 kg bag of sugar is 1,000 g, so a 500 g bag is half of it: 0.5 kg. For grams to volume, see our grams to ml converter.

Kitchen scales usually read in grams below a kilo and kilograms above, so this is the conversion you use most when scaling recipes up or down. For pounds instead of kilograms, see our kg to lbs converter.

grams to kg questions

How many grams are in a kilogram?
Exactly 1,000 g. The prefix "kilo" means a thousand in the SI system, so a kilogram is one thousand grams — the simplest conversion in the metric system.
How do I convert grams to kg?
Divide by 1,000: kg = g ÷ 1,000. So 2,500 g is 2,500 ÷ 1,000 = 2.5 kg. Type any figure above.
How do I convert kg back to grams?
Multiply by 1,000: g = kg × 1,000. So 1.5 kg is 1.5 × 1,000 = 1,500 g. Switch the direction above to do it.
How many milligrams are in a gram?
1,000 mg — the same ×1,000 step: 1 kg = 1,000 g = 1,000,000 mg. For milligram conversions, see our mg to ml converter.
How many kg is 500 grams?
0.5 kg (500 ÷ 1,000) — half a kilogram. Handy benchmarks: 250 g = 0.25 kg, 750 g = 0.75 kg.

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Sources & official guidance

Estimate only — a kilogram is 1,000 g by definition; conversions are exact. See our disclaimer.