A weight converter converts between different mass/weight units — kilograms, pounds, ounces, stone, and metric or imperial tons — instantly and accurately. This page covers how this converter calculator works, converting kg to lbs and oz together, converting kilos to stone and pounds (the common UK format), and several worked examples using real weight values. Dedicated shortcuts live at kg to lbs and lbs to kg. Browse all converters if you need a different tool.
How This Weight Converter Works
The Conversion Method
Every weight unit converts through a common base unit (kilograms), which keeps conversions consistent across all supported units — kg, lbs, oz, stone, and ton variants — using precise, internationally recognized conversion factors rather than rounded approximations. 1 pound equals exactly 0.45359237 kg, which is the exact pound-to-kilogram conversion factor this converter uses (NIST avoirdupois pound).
Weight Converter: kg to lbs and oz
Example: 70 kg to lbs and oz
70 kg ÷ 0.45359237 ≈ 154.32 lbs
The decimal portion (0.32 lbs) converts to ounces: 0.32 × 16 ≈ 5.1 oz
So 70 kg is approximately 154 lbs, 5 oz
This combined kg-to-lbs-and-oz format is especially common for things like baby weight or postal/shipping weight, where a clean "pounds and ounces" figure is more standard than a plain decimal pounds value.
Kilo to Stone and Pounds Calculator
Example: 10 Stone in kg
1 stone = 14 lbs = 6.35029 kg
10 stone × 6.35029 = 63.5 kg
Stone is the standard weight unit used in the UK and Ireland for body weight, typically expressed alongside pounds (like "10 stone 5 lbs") rather than as a decimal stone value — this converter handles that combined stone-and-pounds format directly.
Mass vs. Weight — A Quick Clarification
Why "Weight" and "Mass" Are Different in Physics
Technically, mass and weight are different physical quantities — mass is the amount of matter in an object (measured in kg or lbs), while weight is the force of gravity acting on that mass (technically measured in newtons), which changes depending on gravitational pull (an object weighs less on the moon despite having the same mass). In everyday and commercial use, however, "weight converter" almost always refers to converting mass units like kg, lbs, and oz — which is exactly what this calculator does. The physics distinction matters in scientific contexts but rarely in everyday conversions like body weight, shipping weight, or cooking measurements.
Worked Examples: Common Weight Conversions
Example: 5 kg to lbs
5 kg ÷ 0.45359237 ≈ 11.02 lbs
Example: 150 lbs to kg
150 lbs × 0.45359237 ≈ 68.04 kg
Weight Equivalents Chart
| Unit | Kilograms |
|---|---|
| 1 ounce (oz) | 0.02835 kg |
| 1 pound (lb) | 0.45359 kg |
| 1 stone | 6.35029 kg |
| 1 metric tonne | 1,000 kg |
| 1 US short ton | 907.185 kg |
| 1 UK long ton | 1,016.05 kg |
Understanding Ton Variants: Metric, US, and UK
Metric Tonne vs. US Short Ton vs. UK Long Ton
"Ton" isn't a single universal unit — three distinct versions exist, and confusing them produces meaningfully different results at large scales: the metric tonne (1,000 kg), the US short ton (2,000 lbs, ≈907.2 kg), and the UK long ton (2,240 lbs, ≈1,016 kg). This converter labels each explicitly rather than using a generic "ton" that could be misread as any of the three.
Frequently Asked Questions
How do I convert kg to lbs?
Divide the kilogram value by 0.45359237, or equivalently multiply by approximately 2.20462. For example, 70 kg converts to approximately 154.32 lbs.
How do I convert kg to lbs and oz together?
Convert kg to a decimal lbs value first, then convert the decimal portion to ounces by multiplying by 16. For example, 70 kg converts to approximately 154 lbs 5 oz.
How many kg is 10 stone?
10 stone equals approximately 63.5 kg, using the conversion 1 stone equals 6.35029 kg.
Is lbs the same as pounds?
Yes. Lbs is simply the standard abbreviation for pounds, derived from the Latin word libra. There is no separate conversion between the two since they are the same unit.
What's the difference between mass and weight?
Technically, mass measures the amount of matter in an object, while weight measures the force of gravity acting on that mass. In everyday use, weight converter tools like this one convert mass units regardless of the technical distinction.
Is a metric ton the same as a US ton?
No. A metric tonne is 1,000 kg, a US short ton is approximately 907.2 kg, and a UK long ton is approximately 1,016 kg. These are three different units that all use the word ton.
What is 150 lbs in kg?
150 lbs converts to approximately 68.04 kg.
Is this weight converter free to use?
Yes. It is free, requires no sign-up, and converts weight units instantly.