OC — Online Calculator

Weight & Mass

High Precision Engine

Convert between all major weight and mass units with professional accuracy.

FromUnit

050,000

Unit

0.5

500 g = 500000 mg = 0.5 kg = 1.10231221 lb = 17.63699536 oz

Suggested Conversions

g to kg

Common Weight & Mass units

Tap a unit to set it as your "From" unit (use the rows above for From/To shortcuts).

Conversion tips

1 kg = 2.20462 lb
1 lb = 16 oz = 453.592 g
1 metric ton (t) = 1,000 kg
1 oz = 28.35 g
1 kg = 1,000 g = 1,000,000 mg
1 stone (st) = 14 lb

High Precision Engine

Quick Ratio

1 g = 0.001 kg

Quick conversions

g to kg

Weight & Mass History

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No recent conversions for this calculator yet.

Weight & Mass Converter

Cooking, postage, or workouts: you often need the same weight in different units. This converter uses conventional conversion factors so you can trust the numbers for everyday use. Bookmark a link with your favorite units in the address bar and come back anytime.

Why these units exist

The kilogram was redefined in 2019 against Planck’s constant so mass stays tied to immutable physics, while the avoirdupois pound remains exactly 0.45359237 kg by international agreement. Day-to-day conversions still use those fixed ratios.

How mass conversions work

mass_target = mass_source × (definition of source unit in kg) / (definition of target unit in kg)

Every unit here is expressed as a fixed fraction of the kilogram (or of the pound where imperial applies). Multiplying by the ratio of those fractions cancels units cleanly and avoids rounding drift from chained guesses.

Four ideas worth memorizing

1A kilogram is heavier than a pound—about 2.2 lb—so sanity-check: kg → lb should grow the number.
2Ounces split two ways: avoirdupois (oz) for general weight vs troy for precious metals—stick to context.
31 kg = 1000 g exactly; slide decimals instead of retyping when you only need powers of ten.
4Stone (14 lb) still appears in UK body weight—convert stone→lb first if the tool shows stones.

Popular conversions on this tool

Jump straight in with common pairings—each link opens this same calculator with units and a value filled in, so you can bookmark or share it.

Where the standards come from

These are independent references—government labs, international measurement bodies, or university course materials—that explain the definitions behind the numbers. We don’t endorse third-party sites; we point to them for deeper reading.

How to Convert Weight

Short version: To convert Kilograms (kg) to Pounds (lbs), multiply the weight by 2.20462.

Enter the weight value.
Select the 'From' unit (e.g., Kilograms).
Select the 'To' unit (e.g., Pounds).
The conversion is calculated using industry-standard factors.

Examples people look up

1 kg2.20 lbs

100 g3.52 oz

1 lb16 oz

1 Tonne1,000 kg

Frequently asked questions

How many pounds in a kilogram?

There are approximately 2.20462 pounds in 1 kilogram.

What is the difference between mass and weight?

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass. In everyday usage, they are often used interchangeably.

Why does my kitchen scale disagree slightly?

Consumer scales round and drift; legal-for-trade scales follow stricter classes. For practical cooking, round to the nearest gram unless the recipe is finicky.