Popular Conversions — Click to Load
⚖️ Weight Converter
Enter a value and click Convert
Your conversion results and all-unit breakdown will appear here instantly.
How It Works
Weight Unit Conversion — Formulas & Quick Reference
All weight conversions trace back to one exact relationship: 1 pound = 0.45359237 kg exactly (the international avoirdupois pound, agreed in 1959). Everything else follows from there.
Core Conversion Relationships
Key Exact Definitions
1 lb = 0.45359237 kg
1 kg = 2.20462 lbs
1 stone = 14 lbs = 6.35029 kg
1 oz = 28.3495 g = 0.0625 lb
1 metric ton = 1,000 kg = 2,204.62 lbs
1 US ton (short) = 2,000 lbs = 907.18 kg
Worked Example: Convert 80 kg to Stone & Pounds
1
Divide by 6.35029: 80 ÷ 6.35029 = 12.598 stone
2
Whole number = stones: 12 stone
3
Remainder × 14: 0.598 × 14 = 8.4 lbs
✓ 80 kg = 12 stone 8.4 lbs (≈ 176.4 lbs total)
KG to LBS — Quick Mental Math
For a fast estimate without a calculator: double the kg figure, then add 10%. Example: 50 kg → double = 100, add 10% (10) = 110 lbs (actual: 110.23 lbs — accurate to within 0.2%).
Why Stone Is Different
- Stone is used almost exclusively in the UK and Ireland for body weight
- 1 stone = 14 lbs exactly — a common source of mental math errors
- Medical forms, gyms, and casual conversation in the UK still default to stone
Metric vs US/UK Tons
- Metric ton (tonne): 1,000 kg — used internationally, shipping, freight
- US short ton: 2,000 lbs (907.18 kg) — used in US trucking/freight
- UK long ton: 2,240 lbs (1,016.05 kg) — older British/Imperial standard
- The three differ by up to 10% — critical for freight billing and customs
Reference Tables
Weight Conversion Reference Tables (2026)
Quick lookup for the most common conversions. Use the calculator above for any value.
KG to LBS — Common Values
| KG | LBS | Stone & LBS | Grams |
|---|---|---|---|
| 1 kg | 2.20 lbs | 0 st 2.2 lb | 1,000 g |
| 5 kg | 11.02 lbs | 0 st 11.0 lb | 5,000 g |
| 10 kg | 22.05 lbs | 1 st 8.0 lb | 10,000 g |
| 25 kg | 55.12 lbs | 3 st 13.1 lb | 25,000 g |
| 50 kg | 110.23 lbs | 7 st 12.2 lb | 50,000 g |
| 60 kg | 132.28 lbs | 9 st 6.3 lb | 60,000 g |
| 70 kg | 154.32 lbs | 11 st 0.3 lb | 70,000 g |
| 80 kg | 176.37 lbs | 12 st 8.4 lb | 80,000 g |
| 90 kg | 198.42 lbs | 14 st 2.4 lb | 90,000 g |
| 100 kg | 220.46 lbs | 15 st 10.5 lb | 100,000 g |
LBS to KG — Common Values
| LBS | KG | Stone | Ounces |
|---|---|---|---|
| 100 lb | 45.36 kg | 7.14 st | 1,600 oz |
| 120 lb | 54.43 kg | 8.57 st | 1,920 oz |
| 140 lb | 63.50 kg | 10.00 st | 2,240 oz |
| 150 lb | 68.04 kg | 10.71 st | 2,400 oz |
| 160 lb | 72.57 kg | 11.43 st | 2,560 oz |
| 180 lb | 81.65 kg | 12.86 st | 2,880 oz |
| 200 lb | 90.72 kg | 14.29 st | 3,200 oz |
| 220 lb | 99.79 kg | 15.71 st | 3,520 oz |
Ounces & Grams — Cooking Reference
| Ounces | Grams | Pounds |
|---|---|---|
| 1 oz | 28.35 g | 0.0625 lb |
| 2 oz | 56.70 g | 0.125 lb |
| 4 oz | 113.40 g | 0.25 lb |
| 8 oz | 226.80 g | 0.5 lb |
| 16 oz | 453.59 g | 1 lb |
| 32 oz | 907.18 g | 2 lb |
Tons — Metric vs US vs UK
| Type | In LBS | In KG | Common Use |
|---|---|---|---|
| Metric Ton (tonne) | 2,204.62 lb | 1,000 kg | International shipping, global freight |
| US Short Ton | 2,000 lb | 907.18 kg | US trucking, domestic freight |
| UK Long Ton | 2,240 lb | 1,016.05 kg | Older British/Imperial measures |
Unit Guide
When to Use Each Weight Unit
Weight units split by region and use case — knowing which to use prevents shopping, shipping, and dosage mistakes.
Metric Units
- Milligrams (mg): Medication dosages, lab measurements
- Grams (g): Cooking, jewelry, small packages
- Kilograms (kg): Body weight (most of the world), luggage, groceries
- Metric tons (t): Shipping, industrial, vehicle weights
Imperial / US Customary
- Ounces (oz): US cooking, small packages, precious metals
- Pounds (lb): Body weight (US), gym weights, US groceries
- Stone (st): Body weight in the UK/Ireland (1 stone = 14 lbs)
- US/UK tons: Freight and trucking, differ from each other and metric tons
Common Real-World Needs
- International gym equipment: Plates labeled in kg outside the US
- Airline baggage limits: Often listed in kg (e.g. the common 23 kg rule)
- UK medical & casual body weight: Typically discussed in stone, not kg or lbs
- Recipe conversion: US recipes use oz/lb; international recipes use g/kg
- Online shopping: Product weight specs vary between kg and lbs by retailer/region
- Freight & shipping quotes: Confirm whether a "ton" is metric, US, or UK — the difference is up to 10%
FAQ
Weight Converter — Frequently Asked Questions
Answers to the most common questions about converting kg, lbs, stone, ounces, and tons.