Weight Converter – Convert kg, lbs, Stone, Grams, Ounces & Tons Online
Instant weight conversion between metric and imperial units — kg to lbs, lbs to kg, kg to stone, grams to ounces, and more — with charts and formulas
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Quick Weight Conversions – Most Popular Pairs
kg to Stone and Pounds – Dedicated Converter
Stone is used in the UK and Ireland to express body weight. 1 stone = 14 pounds = 6.35029 kg. Use this dedicated tool to convert between kg, stone, and pounds in one step.
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Weight Conversion Chart
kg to lbs – common values
| Kilograms (kg) | Pounds (lbs) | Stone + lbs | Grams (g) |
|---|---|---|---|
| 1 kg | 2.205 lbs | 0 st 2.205 lbs | 1,000 g |
| 5 kg | 11.023 lbs | 0 st 11.023 lbs | 5,000 g |
| 10 kg | 22.046 lbs | 1 st 8.046 lbs | 10,000 g |
| 20 kg | 44.092 lbs | 3 st 2.092 lbs | 20,000 g |
| 45 kg | 99.208 lbs | 7 st 1.208 lbs | 45,000 g |
| 50 kg | 110.231 lbs | 7 st 12.231 lbs | 50,000 g |
| 55 kg | 121.254 lbs | 8 st 9.254 lbs | 55,000 g |
| 60 kg | 132.277 lbs | 9 st 6.277 lbs | 60,000 g |
| 70 kg | 154.324 lbs | 11 st 0.324 lbs | 70,000 g |
| 75 kg | 165.347 lbs | 11 st 11.347 lbs | 75,000 g |
| 80 kg | 176.37 lbs | 12 st 8.37 lbs | 80,000 g |
| 90 kg | 198.416 lbs | 14 st 2.416 lbs | 90,000 g |
| 100 kg | 220.462 lbs | 15 st 10.462 lbs | 100,000 g |
| 110 kg | 242.508 lbs | 17 st 4.508 lbs | 110,000 g |
| 120 kg | 264.555 lbs | 18 st 12.555 lbs | 120,000 g |
lbs to kg – common values
| Pounds (lbs) | Kilograms (kg) | Stone + lbs | Grams (g) |
|---|---|---|---|
| 1 lb | 0.454 kg | 0 st 1 lb | 453.6 g |
| 10 lbs | 4.536 kg | 0 st 10 lbs | 4,536 g |
| 50 lbs | 22.68 kg | 3 st 8 lbs | 22,680 g |
| 100 lbs | 45.36 kg | 7 st 2 lbs | 45,359 g |
| 130 lbs | 58.97 kg | 9 st 4 lbs | 58,967 g |
| 150 lbs | 68.04 kg | 10 st 10 lbs | 68,039 g |
| 160 lbs | 72.57 kg | 11 st 6 lbs | 72,575 g |
| 175 lbs | 79.38 kg | 12 st 7 lbs | 79,379 g |
| 190 lbs | 86.18 kg | 13 st 8 lbs | 86,183 g |
| 200 lbs | 90.72 kg | 14 st 4 lbs | 90,719 g |
oz to g – common values
| Ounces (oz) | Grams (g) | Pounds (lbs) | Kilograms (kg) |
|---|---|---|---|
| 1 oz | 28.35 g | 0.0625 lb | 0.0283 kg |
| 4 oz (¼ lb) | 113.4 g | 0.25 lb | 0.113 kg |
| 8 oz (½ lb) | 226.8 g | 0.5 lb | 0.227 kg |
| 12 oz (¾ lb) | 340.2 g | 0.75 lb | 0.340 kg |
| 16 oz (1 lb) | 453.6 g | 1 lb | 0.454 kg |
| 32 oz (2 lbs) | 907.2 g | 2 lbs | 0.907 kg |
Metric Weight System – g, kg, mg, tonne
The metric system organizes weight in powers of 10:
- 1 tonne (metric ton) = 1,000 kg
- 1 kilogram (kg) = 1,000 g (base unit in everyday use)
- 1 gram (g) = 1,000 mg
- 1 milligram (mg) = 0.001 g = 0.000001 kg
| Unit | mg | g | kg | tonne |
|---|---|---|---|---|
| 1 mg | 1 | 0.001 | 0.000001 | 0.000000001 |
| 1 g | 1,000 | 1 | 0.001 | 0.000001 |
| 100 g | 100,000 | 100 | 0.1 | 0.0001 |
| 500 g | 500,000 | 500 | 0.5 | 0.0005 |
| 1 kg | 1,000,000 | 1,000 | 1 | 0.001 |
| 10 kg | 10,000,000 | 10,000 | 10 | 0.01 |
| 100 kg | 100,000,000 | 100,000 | 100 | 0.1 |
| 1,000 kg | — | 1,000,000 | 1,000 | 1 |
Weight Units Reference Table
| Unit | Symbol | System | Value in kg | Common Use |
|---|---|---|---|---|
| Milligram | mg | Metric | 0.000001 kg | Medicine, pharmaceuticals, nutrition labels |
| Gram | g | Metric | 0.001 kg | Food portions, cooking, postal weights |
| Kilogram | kg | Metric | 1 kg (base) | Body weight, produce, science |
| Metric Tonne | t | Metric | 1,000 kg | Cargo, vehicle weight, industrial |
| Ounce (avoirdupois) | oz | Imperial | 0.028350 kg | Cooking, food packaging (US/UK) |
| Pound | lb | Imperial | 0.453592 kg | Body weight (US), grocery, shipping |
| Stone | st | Imperial | 6.35029 kg | Body weight in UK and Ireland |
| US Short Ton | ton | US | 907.185 kg | US industrial, trucking, agriculture |
| UK Long Ton | long ton | UK | 1,016.05 kg | UK shipping, older references |
| Troy Ounce | troy oz | Precious metals | 0.031103 kg | Gold, silver, platinum pricing |
Weight Conversion Formula Cheat Sheet
kg → lbs
lbs = kg × 2.20462
80 kg = 80 × 2.20462 = 176.37 lbs
lbs → kg
kg = lbs × 0.453592
200 lbs = 200 × 0.453592 = 90.72 kg
kg → stone
st = kg ÷ 6.35029
70 kg = 70 ÷ 6.35029 = 11.02 st
stone → kg
kg = st × 6.35029
10 st = 10 × 6.35029 = 63.5 kg
g → kg
kg = g ÷ 1000
3500 g = 3500 ÷ 1000 = 3.5 kg
kg → g
g = kg × 1000
2.5 kg = 2.5 × 1000 = 2500 g
oz → g
g = oz × 28.3495
16 oz = 16 × 28.3495 = 453.6 g
g → oz
oz = g ÷ 28.3495
100 g = 100 ÷ 28.35 = 3.527 oz
lbs → g
g = lbs × 453.592
2 lbs = 2 × 453.592 = 907.2 g
g → lbs
lbs = g ÷ 453.592
500 g = 500 ÷ 453.6 = 1.102 lbs
lbs → stone
st = lbs ÷ 14
168 lbs = 168 ÷ 14 = 12 st
kg → metric ton
t = kg ÷ 1000
2500 kg = 2500 ÷ 1000 = 2.5 t
Worked Examples
10 kg to pounds
10 × 2.20462
= 22.046 lbs
10 lbs to kg
10 × 0.453592
= 4.536 kg
45 kg to pounds
45 × 2.20462
= 99.208 lbs
50 lbs to kg
50 × 0.453592
= 22.680 kg
50 kg to pounds
50 × 2.20462
= 110.231 lbs (7 st 12.2 lbs)
55 kg to lbs
55 × 2.20462
= 121.254 lbs
60 kg to pounds
60 × 2.20462
= 132.277 lbs (9 st 6.3 lbs)
110 kg to lbs
110 × 2.20462
= 242.508 lbs
130 lbs to kg
130 × 0.453592
= 58.967 kg
150 lbs to kg
150 × 0.453592
= 68.039 kg
160 lbs to kg
160 × 0.453592
= 72.575 kg
175 lbs to kg
175 × 0.453592
= 79.379 kg
190 lbs to kg
190 × 0.453592
= 86.183 kg
62 kg to lbs
62 × 2.20462
= 136.687 lbs (9 st 10.7 lbs)
Step-by-Step Conversions
How to convert kg to stone and pounds
Convert 75 kg to stone and pounds:
Step 1: Convert to total pounds → 75 × 2.20462 = 165.347 lbs
Step 2: Divide by 14 → 165.347 ÷ 14 = 11.81… → 11 stone (whole number)
Step 3: Remaining pounds → 165.347 − (11 × 14) = 165.347 − 154 = 11.347 lbs
Result: 75 kg = 11 stone 11.35 lbs
Step 1: Convert to total pounds → 75 × 2.20462 = 165.347 lbs
Step 2: Divide by 14 → 165.347 ÷ 14 = 11.81… → 11 stone (whole number)
Step 3: Remaining pounds → 165.347 − (11 × 14) = 165.347 − 154 = 11.347 lbs
Result: 75 kg = 11 stone 11.35 lbs
How to convert stone and pounds to kg
Convert 12 stone 6 lbs to kg:
Step 1: Total pounds → (12 × 14) + 6 = 168 + 6 = 174 lbs
Step 2: Convert to kg → 174 × 0.453592 = 78.925 kg
Result: 12 st 6 lbs = 78.93 kg
Step 1: Total pounds → (12 × 14) + 6 = 168 + 6 = 174 lbs
Step 2: Convert to kg → 174 × 0.453592 = 78.925 kg
Result: 12 st 6 lbs = 78.93 kg
How to convert ounces to grams
Convert 12 oz to grams:
Step 1: g = oz × 28.3495
Step 2: 12 × 28.3495 = 340.194 g
Result: 12 oz = 340.19 g (just under ¾ of a pound)
Step 1: g = oz × 28.3495
Step 2: 12 × 28.3495 = 340.194 g
Result: 12 oz = 340.19 g (just under ¾ of a pound)
How to convert pounds to grams
Convert 2.5 lbs to grams:
Step 1: g = lbs × 453.592
Step 2: 2.5 × 453.592 = 1133.98 g
Result: 2.5 lbs = 1,134 g = 1.134 kg
Step 1: g = lbs × 453.592
Step 2: 2.5 × 453.592 = 1133.98 g
Result: 2.5 lbs = 1,134 g = 1.134 kg
Weight & BMI – What's the Difference?
BMI is not a weight unit conversion. This page converts weight between units
(kg, lbs, stone, etc.). Body Mass Index (BMI) uses both weight AND height in a separate formula: BMI = weight(kg) ÷
height(m)². To calculate your BMI, use the dedicated BMI Calculator linked below.
Common weight-to-BMI searches — such as "convert kg to BMI" or "BMI to kg conversion" — cannot be answered with weight alone. A person weighing 70 kg at 1.60 m has a different BMI than someone at 1.80 m. Use this converter to express your weight in the units your BMI calculator requires, then use the BMI tool for the full calculation.
Common Weight Conversion Mistakes
- Confusing kg and lbs. 1 kg ≠ 1 lb. 1 kg ≈ 2.205 lbs. A person saying "I weigh 70" means very different things in kilograms versus pounds.
- Forgetting that 1 stone = 14 pounds — not 10 or 12. Stone is often confused with other units. The conversion is exactly 14 lbs per stone.
- Rounding 1 kg = 2.2 lbs as exact. 1 kg = 2.20462 lbs. For rough estimates, 2.2 works. For precise conversions (nutrition labels, medical records), use the full factor.
- Mixing grams and kilograms. A recipe calling for "500 g" is 0.5 kg, not 500 kg. Always confirm the prefix: "kilo" means ×1000.
- Confusing troy ounces with avoirdupois ounces. 1 troy oz = 31.1 g; 1 regular (avoirdupois) oz = 28.35 g. Troy ounces are used for precious metals only — do not apply them to food or shipping.
- Confusing weight with BMI. Weight is a physical measurement in kg or lbs. BMI is a body-composition index calculated from weight and height. They cannot be directly converted into each other without the height value.
- Mixing US tons and metric tonnes. 1 US short ton = 2,000 lbs ≈ 907 kg. 1 metric tonne = 1,000 kg ≈ 2,205 lbs. They are close but not the same — using the wrong one in shipping or industrial contexts creates real errors.
Frequently Asked Questions
How do I convert kg to lbs?
Multiply kilograms by 2.20462. Example: 65 kg = 65 × 2.20462 = 143.3 lbs. Use the quick kg →
lbs card above for instant results.
How do I convert lbs to kg?
Multiply pounds by 0.453592. Example: 180 lbs = 180 × 0.453592 = 81.65 kg. Use the quick lbs →
kg card above.
How many pounds are in 1 kilogram?
1 kilogram = 2.20462 pounds. A quick approximation is 2.2 lbs per kg, accurate to within 0.2%.
How many kilograms are in 1 pound?
1 pound = 0.453592 kilograms (approximately 454 grams).
How do I convert kg to stone and pounds?
Step 1: kg × 2.20462 = total pounds. Step 2: floor(total lbs ÷ 14) = stone. Step 3: total lbs
− (stone × 14) = remaining pounds. Use the dedicated kg ↔ Stone + Pounds tool above for one-click results.
How many pounds are in 1 stone?
Exactly 14 pounds. 1 stone = 14 lb = 6.35029 kg. Stone is used mainly in the UK and Ireland to
express body weight.
How do I convert grams to kilograms?
Divide grams by 1000. Example: 750 g = 0.75 kg. Reverse: kg × 1000 = g.
How do I convert ounces to grams?
Multiply ounces (avoirdupois) by 28.3495. Example: 6 oz = 6 × 28.3495 = 170.1 g. To reverse: g
÷ 28.3495 = oz.
What is a weight conversion chart?
A weight conversion chart is a reference table showing equivalent values across different
units. This page includes kg to lbs, kg to stone + lbs, lbs to kg, oz to grams, and metric weight tables for
common values.
Can I convert weight online for free?
Yes. The weight converter above is completely free, requires no sign-up, and works instantly.
Use the main converter for any unit pair, or the quick-conversion cards for the most common weights.
Is BMI the same as a weight converter?
No. BMI uses both weight and height in the formula BMI = kg ÷ m². This page converts weight
between units only. Use the BMI Calculator (linked below) for body mass index calculations.
What is the difference between a troy ounce and a regular ounce?
Avoirdupois ounce (everyday use): 28.3495 g. Troy ounce (precious metals): 31.1035 g. A troy
ounce is about 10% heavier. The troy ounce option in the advanced converter is labeled to avoid confusion.
How do I convert pounds to stone?
Divide total pounds by 14. Example: 154 lbs = 11 stone exactly. For non-whole results: 160 lbs
= floor(160 ÷ 14) = 11 stone + (160 − 154) = 11 stone 6 lbs.
How many grams in 1 ounce?
1 avoirdupois ounce = 28.3495 grams (often rounded to 28.35 g). 1 troy ounce = 31.1035 g.
How do I convert kg to tons?
Metric tonnes: divide kg by 1000 (1 tonne = 1000 kg). US short tons: divide kg by 907.185. UK
long tons: divide kg by 1016.05. Select the correct ton type in the main converter above.
Related Calculators
Disclaimer: All conversions use internationally defined unit factors. The avoirdupois ounce
(28.3495 g) and troy ounce (31.1035 g) are distinct units — the troy ounce applies to precious metals only. BMI
calculations require height in addition to weight and cannot be performed by this converter alone. For medical,
pharmaceutical, laboratory, or commercial shipping applications, verify results against certified standards.