Mass conversions use the exact international pound (1 lb = 453.59237 g since 1959). Everyday “weight” here means mass at standard Earth gravity. Troy ounce (precious metals) differs from avoirdupois ounce.

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Weight Converter — kg to lbs, oz & Stone

Convert kilograms, pounds, ounces, grams, stone, and tons with exact SI/avoirdupois factors—plus kg↔lbs charts and UK stone+lb formatting.

Sample conversions (kilogram baseline)

  • 1 kg → lb: 2.20462262 lb
  • 1 lb → kg: 0.45359237 kgExact: 1 lb = 453.59237 g
  • 70 kg → lb: 154.3236 lb11 st 0.32 lb

For BMI from height and weight, use the BMI Calculator. For volume ↔ mass workflows, try the Volume Converter.

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Weight conversion charts

Quick reference tables for the most-searched pairs: kg to lbs, lbs to kg, ounces to grams, and stone to kilograms. Factors use the exact international pound (1 lb = 453.59237 g).

kg to lbs chart

Multiply kilograms by ≈ 2.2046226218

kglb
1 kg2.2046 lb
2 kg4.4092 lb
3 kg6.6139 lb
4 kg8.8185 lb
5 kg11.0231 lb
6 kg13.2277 lb
7 kg15.4324 lb
8 kg17.637 lb
9 kg19.8416 lb
10 kg22.0462 lb
15 kg33.0693 lb
20 kg44.0925 lb
25 kg55.1156 lb
30 kg66.1387 lb
40 kg88.1849 lb
50 kg110.2311 lb
60 kg132.2774 lb
70 kg154.3236 lb
75 kg165.3467 lb
80 kg176.3698 lb
90 kg198.416 lb
100 kg220.4623 lb

lbs to kg chart

Multiply pounds by 0.45359237

lbkg
50 lb22.6796 kg
60 lb27.2155 kg
70 lb31.7515 kg
80 lb36.2874 kg
90 lb40.8233 kg
100 lb45.3592 kg
110 lb49.8952 kg
120 lb54.4311 kg
130 lb58.967 kg
140 lb63.5029 kg
150 lb68.0389 kg
160 lb72.5748 kg
170 lb77.1107 kg
180 lb81.6466 kg
190 lb86.1826 kg
200 lb90.7185 kg
220 lb99.7903 kg
250 lb113.3981 kg

oz to grams chart

1 avoirdupois ounce ≈ 28.3495 g

ozg
1 oz28.35 g
2 oz56.7 g
3 oz85.05 g
4 oz113.4 g
5 oz141.75 g
6 oz170.1 g
7 oz198.45 g
8 oz226.8 g
10 oz283.5 g
12 oz340.19 g
14 oz396.89 g
16 oz453.59 g

stone to kg chart

1 stone = 14 lb ≈ 6.35029 kg

stkg
8 st50.802 kg
9 st57.153 kg
10 st63.503 kg
11 st69.853 kg
12 st76.204 kg
13 st82.554 kg
14 st88.904 kg
15 st95.254 kg
16 st101.605 kg
18 st114.305 kg
20 st127.006 kg
By Muhammad Abdullah Rauf · Founder, EverydayTools.proUpdated 2026-07-10

How do you convert between weight units?

Weight conversion uses internationally standardized factors. The avoirdupois pound (used in the US and UK for everyday weights) is defined as exactly 453.59237 grams since 1959.

**Common weight conversions:**

• 1 kilogram ≈ 2.2046226218 pounds

• 1 pound = 453.59237 grams = 16 ounces

• 1 ounce ≈ 28.349523125 grams

• 1 stone (UK) = 14 pounds ≈ 6.35029318 kg

• 1 US ton = 2,000 pounds ≈ 907.18474 kg

• 1 metric ton (tonne) = 1,000 kg ≈ 2,204.62 pounds

• 1 gram = 0.001 kg ≈ 0.035274 ounces

• 1 milligram = 0.001 grams

**Weight vs Mass:**

Technically, weight is a force (mass × gravitational acceleration), while mass is the amount of matter. In everyday use, 'weight' means mass. These conversions assume standard Earth gravity (9.80665 m/s²). On the Moon, you would 'weigh' 1/6 as much but your mass is unchanged.

**Note on troy ounces**: The troy ounce (used for precious metals) ≈ 31.1034768 g, different from the avoirdupois ounce (≈ 28.3495 g). The calculator uses avoirdupois for everyday weight and lists troy ounce separately.

Quick answers

Concise answers for common searches — definitions, steps, and comparisons.

How many pounds is 1 kg?

1 kilogram = 2.2046226218 pounds (exact inverse of 1 lb = 453.59237 g). Multiply kg by 2.20462 for everyday use.

How many kg is 1 pound?

1 pound = 0.45359237 kilograms exactly. Multiply lbs by 0.45359237, or divide by 2.2046226218.

How many pounds is 70 kg?

70 kg ≈ 154.3236 lb (about 11 stone 4 lb). Use the converter presets for common body weights.

How do I convert stone to kg?

Multiply stone by 6.35029318 (1 stone = 14 lb). Example: 12 stone ≈ 76.20 kg.

How to use Weight & mass conversion guide

  1. Enter the weight to convert

    Type your weight value (or tap a preset like 70 kg, 150 lb, or 12 stone) and choose the starting unit.

  2. Select the target unit

    Choose kilograms, pounds, ounces, grams, stone, tons, or troy ounce. Swap units anytime with the swap control.

  3. Read the result and compound formats

    The conversion updates instantly. Body-weight results also show UK-style stone + pounds (e.g., 12 st 2 lb) and pounds + ounces alongside the primary unit.

  4. Use charts or share the link

    Scroll to the kg↔lbs and oz↔g charts for quick lookups, or copy/share a URL that restores your exact conversion.

Who uses Weight & mass conversion guide?

Common real-world scenarios where this tool saves time.

Body weight conversion

US scales read lbs; most of the world uses kg; UK often uses stones. A person weighing 170 lbs = 77.1 kg = 12 stone 2 lbs.

Cooking and recipes

US recipes use cups and oz; metric recipes use grams. Convert baking ingredient weights for accuracy: 1 cup of flour ≈ 125–130g (weighing is more precise than volume for baking).

Shipping and freight

International shipping uses kg; US domestic shipping often uses lbs. Calculate dimensional weight and convert package weights for accurate shipping quotes.

Fitness and nutrition tracking

Food labels in the US show oz; apps and recipes may use grams. Protein powder scoops in grams; serving sizes in oz. Convert between systems for accurate macro tracking.

Reference tables

Weight unit conversion reference

Most commonly needed weight conversions.

FromToMultiply byExample
Pounds (lbs)Kilograms (kg)× 0.45359237150 lbs = 68.04 kg
Kilograms (kg)Pounds (lbs)× 2.204622621870 kg = 154.32 lbs
Stone (UK)Kilograms× 6.3502931812 stone = 76.20 kg
KilogramsStone÷ 6.3502931880 kg ≈ 12 st 8 lbs
Ounces (oz)Grams (g)× 28.3495231258 oz = 226.80 g
Grams (g)Ounces (oz)÷ 28.349523125200 g ≈ 7.05 oz
US tonsMetric tonnes× 0.907184741 US ton ≈ 0.907 tonnes

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Frequently Asked Questions

How many pounds are in a kilogram?

Exactly 2.2046226218487757 pounds per kilogram (derived from the exact definition: 1 lb = 453.59237 g exactly). For practical purposes, multiply kg by 2.20462 or use the quick estimate: kg × 2.2 for an approximate result.

How do I convert my weight from lbs to kg?

Multiply by 0.45359237 (or divide by 2.2046226218). Example: 150 lbs × 0.45359237 = 68.0388555 kg. Quick mental estimate: halve the pounds value and subtract 10% (150 → 75 → 67.5 kg — close enough for most purposes).

What is a stone in weight?

A stone is a UK unit of body weight equal to 14 pounds ≈ 6.35029318 kg. It is commonly used in the UK and Ireland for stating personal body weight (e.g., '12 stone 7' = 12 × 14 + 7 = 175 lbs ≈ 79.4 kg). This tool shows stone + remaining pounds automatically.

What is the difference between a metric ton and a US ton?

A metric ton (tonne) = 1,000 kg ≈ 2,204.62 lbs. A US (short) ton = 2,000 lbs ≈ 907.185 kg. A UK (long) ton = 2,240 lbs ≈ 1,016.05 kg. When reading international trade or shipping data, 'tons' usually means metric tonnes; US industry typically means short tons.

How many grams are in an ounce?

The avoirdupois ounce ≈ 28.349523125 grams. The troy ounce (used for precious metals) ≈ 31.1034768 grams. When recipes say 'ounce', they mean avoirdupois. When jewelry or precious metals quotes say 'ounce', they mean troy ounce.

How do I convert ounces to grams quickly?

Multiply by 28.3495. Quick mental estimate: multiply by 30 (gives ~6% overestimate, useful for rough conversions). Example: 8 oz × 28.3495 ≈ 226.8 g. Or: 8 oz × 30 = 240 g (quick estimate).

What is the difference between weight and mass?

Mass is the amount of matter (kg, lbs — constant anywhere in the universe). Weight is the force exerted by gravity on that mass (Newtons = kg × 9.81 m/s²). In everyday use, 'weight' means mass. On the Moon, your mass is the same as on Earth, but you 'weigh' 1/6 as much because lunar gravity is ~1.62 m/s² vs Earth's 9.81 m/s².

Privacy, accuracy, and trust

Privacy

Weight values you enter are converted locally in your browser—they are not uploaded to EverydayTools servers.

Uses avoirdupois ounce for everyday weight. Troy ounce (precious metals) ≈ 31.1035 g — different from the ≈ 28.3495 g avoirdupois ounce. Not a substitute for certified trade scales.

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Reviewed on 2026-07-10.

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