Weight and Mass Converter
Convert between different units of weight and mass Convert between 19 different units instantly with our free online tool.
Formula: 1 kg × 1,000 = 1,000 g
Available Weight and Mass Units
19 units supported for instant conversion
About Weight and Mass Conversion
Our free online weight and mass converter helps you quickly and accurately convert between 19 different units of weight and mass. Whether you're a student, professional, or simply need everyday conversions, you get instant, precise results with the formula displayed.
Convert between different units of weight and mass This converter supports both metric and imperial units, making it ideal for international use. All conversions use internationally recognized standards and formulas.
Did You Know?
A cubic meter of water weighs exactly 1,000 kg (1 metric ton) at 4°C — which is why the kilogram was originally defined as the mass of 1 liter of water.
The blue whale is the heaviest animal ever recorded, with individuals reaching up to 190,000 kg (420,000 lbs) — heavier than 30 elephants.
A single A4 sheet of 80 g/m² paper weighs about 5 grams. A ream of 500 sheets weighs 2.5 kg.
Gold is so dense that all the gold ever mined (≈244,000 tonnes) would fit into a cube roughly 23 m on each side — smaller than an Olympic swimming pool.
The ISS weighs about 420,000 kg on Earth, yet in orbit it is effectively weightless because it is in continuous free fall around Earth.
Why Use Our Weight and Mass Converter?
Instant Results
Conversions update as you type — no button clicks needed.
High Precision
Uses internationally standardized conversion factors (SI & NIST).
19+ Units
Convert between 19 weight and mass units used around the world.
API & AI Ready
REST API and MCP server let apps and AI assistants convert programmatically.
Common Weight and Mass Conversion Table
Quick reference: Kilogram (kg) to other common units.
| Kilogram (kg) | Gram (g) | Milligram (mg) | Microgram (μg) | Metric Ton (t) |
|---|---|---|---|---|
| 1 | 1,000 | 1,000,000 | 1,000,000,000 | 0.001 |
| 2 | 2,000 | 2,000,000 | 2,000,000,000 | 0.002 |
| 5 | 5,000 | 5,000,000 | 5,000,000,000 | 0.005 |
| 10 | 10,000 | 10,000,000 | 1.000000e+10 | 0.01 |
| 25 | 25,000 | 25,000,000 | 2.500000e+10 | 0.025 |
| 50 | 50,000 | 50,000,000 | 5.000000e+10 | 0.05 |
| 100 | 100,000 | 100,000,000 | 1.000000e+11 | 0.1 |
How to Use This Weight and Mass Converter
Enter Value
Type the number you want to convert
Select From Unit
Choose your starting unit
Select To Unit
Pick your target unit
View Result
See instant conversion with formula
Copy Result
Click to copy to clipboard