How many pounds are in a kilogram?

1 kilogram equals exactly 2.20462 pounds (lbs). For quick mental maths in the UK, multiply kg by 2.2 to get an approximate pound value. This conversion is standard worldwide and used by the NHS.

Why does the UK use stones for body weight?

The stone (14 pounds) has been used in the UK since medieval times. While the UK officially uses metric kilograms for medical records, stones remain culturally popular for personal body weight measurement.

How do I convert kg to stone and pounds for NHS records?

First multiply kg by 2.20462 to get pounds, then divide by 14 to get stones. The remainder is pounds. The NHS uses kilograms in medical records, but you can convert: 75 kg = 165.35 lbs = 11 stone 11.3 lbs.

KG to LBS Converter | Kilograms to Pounds Calculator UK 2025

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Kilograms to Pounds Converter

Enter Weight in Kilograms

0.00

pounds (lbs)

0 st 0 lbs

UK format (stones & pounds)

ounces (oz)

grams (g)

Common Weight Conversions

Kilograms	Pounds	Stones & Lbs	Typical Context
50 kg	110.23 lbs	7 st 12 lbs	Light adult
55 kg	121.25 lbs	8 st 9 lbs	Petite woman
60 kg	132.28 lbs	9 st 6 lbs	Average woman
65 kg	143.30 lbs	10 st 3 lbs	Healthy weight
70 kg	154.32 lbs	11 st 0 lbs	Average adult
75 kg	165.35 lbs	11 st 11 lbs	Average man
80 kg	176.37 lbs	12 st 8 lbs	Athletic build
85 kg	187.39 lbs	13 st 5 lbs	Larger build
90 kg	198.42 lbs	14 st 2 lbs	Heavy build
100 kg	220.46 lbs	15 st 10 lbs	Very heavy

Pounds to Kilograms Converter

Enter Weight in Pounds

lbs

0.00

kilograms (kg)

grams (g)

0 st 0 lbs

UK stones

Pounds to Kilograms Reference

Pounds	Kilograms	Stones
100 lbs	45.36 kg	7 st 2 lbs
120 lbs	54.43 kg	8 st 8 lbs
140 lbs	63.50 kg	10 st 0 lbs
150 lbs	68.04 kg	10 st 10 lbs
160 lbs	72.57 kg	11 st 6 lbs
180 lbs	81.65 kg	12 st 12 lbs
200 lbs	90.72 kg	14 st 4 lbs
220 lbs	99.79 kg	15 st 10 lbs

Stone & Pounds Converter

Convert between UK stones/pounds and metric kilograms

Stones

Pounds

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kilograms (kg)

total pounds (lbs)

Understanding the UK Stone System

The stone is a traditional unit of weight used predominantly in the United Kingdom and Ireland. One stone equals exactly 14 pounds or approximately 6.35 kilograms.

Historical Origin

The stone has been used in Britain since the 14th century, originally for weighing wool. Different trades had different stone weights until it was standardised at 14 pounds in 1835.

Modern UK Usage

While the UK officially uses kilograms, stones remain popular for personal weight. You'll hear "I weigh 12 stone" rather than "76 kg" in everyday conversation.

NHS Records

The NHS uses kilograms in all medical records and prescriptions. However, many UK clinics still have scales showing both stones and kilograms.

Stone Conversion Reference

Stones	Pounds	Kilograms
8 stone	112 lbs	50.8 kg
9 stone	126 lbs	57.2 kg
10 stone	140 lbs	63.5 kg
11 stone	154 lbs	69.9 kg
12 stone	168 lbs	76.2 kg
13 stone	182 lbs	82.6 kg
14 stone	196 lbs	88.9 kg
15 stone	210 lbs	95.3 kg
16 stone	224 lbs	101.6 kg

Gym Weight Plates Converter

UK gyms use both kilogram and pound plates. Convert between them to track your progress.

Total Weight Lifted (kg)

pounds (lbs)

+ 20kg bar

Standard Olympic Bar

0 kg

Plates per side

Standard Gym Weight Plates (UK)

Most UK gyms use kilogram plates. Here are the common plate sizes and their pound equivalents:

25 kg

55.1 lbs

20 kg

44.1 lbs

15 kg

33.1 lbs

10 kg

22.0 lbs

5 kg

11.0 lbs

2.5 kg

5.5 lbs

1.25 kg

2.8 lbs

Olympic Barbell Standards

Equipment	Weight (kg)	Weight (lbs)
Men's Olympic Bar	20 kg	44 lbs
Women's Olympic Bar	15 kg	33 lbs
EZ Curl Bar	10-12 kg	22-26 lbs
Trap Bar	20-25 kg	44-55 lbs
Smith Machine Bar	7-15 kg	15-33 lbs

Gym Weight Tips

Progressive overload: Add 2.5 kg (5.5 lbs) per week for upper body, 5 kg (11 lbs) for lower body
Plate math: Remember the bar weight! A "60 kg bench" is actually 60 kg including the 20 kg bar
Conversion tip: Multiply kg by 2.2 to get approximate lbs quickly
UK vs US gyms: Most UK commercial gyms use kg plates; some older gyms may have mixed kg/lbs

How to Convert Kilograms to Pounds

Converting between kilograms and pounds is essential in the UK, where both metric and imperial measurements are used. The kilogram is the official SI unit, but many Britons still think in stones and pounds for body weight.

Key Conversion Formulas:

KG to LBS: Pounds = Kilograms × 2.20462
LBS to KG: Kilograms = Pounds ÷ 2.20462
KG to Stone: Stones = Kilograms × 0.157473
Stone to KG: Kilograms = Stones × 6.35029

Step-by-Step Conversion Examples

Example 1: 70 kg to pounds

70 × 2.20462 = 154.32 lbs

In stones: 154.32 ÷ 14 = 11.02
= 11 stone 0.3 lbs

Example 2: 85 kg to stones

85 × 2.20462 = 187.39 lbs

187.39 ÷ 14 = 13.38
= 13 stone 5.4 lbs

Example 3: 150 lbs to kg

150 ÷ 2.20462 = 68.04 kg

UK Weight Measurement Context

Understanding when to use kilograms, pounds, or stones in the UK depends on the context. Here's a guide to typical usage:

Context	Commonly Used	Official/Legal
Personal body weight	Stones & pounds	Kilograms
NHS medical records	Kilograms	Kilograms
Prescription dosages	Kilograms	Kilograms
Gym/fitness	Kilograms	Kilograms
Baby birth weight	Pounds & ounces	Grams/kg
Food packaging	Grams/kg	Grams/kg
Cooking recipes	Grams (UK) / oz (US)	Grams
Airline baggage	Kilograms	Kilograms

Baby Weight Conversions

In the UK, baby weights are traditionally announced in pounds and ounces ("7 pounds 5 ounces"), though the NHS records weights in grams and kilograms.

Pounds & Oz	Kilograms	Grams	Classification
5 lbs 8 oz	2.50 kg	2,495 g	Low birth weight
6 lbs 0 oz	2.72 kg	2,722 g	Normal (lower)
6 lbs 8 oz	2.95 kg	2,948 g	Normal
7 lbs 0 oz	3.18 kg	3,175 g	Normal
7 lbs 5 oz	3.32 kg	3,317 g	Average UK baby
8 lbs 0 oz	3.63 kg	3,629 g	Normal
8 lbs 13 oz	4.00 kg	3,997 g	Above average
9 lbs 15 oz	4.50 kg	4,500 g	Large baby

NHS Baby Weight Guidelines

The NHS considers a healthy birth weight to be between 2.5 kg (5 lbs 8 oz) and 4.5 kg (9 lbs 15 oz). The average UK baby weighs approximately 3.3 kg (7 lbs 5 oz).

Airline Baggage Weight Limits

Knowing weight conversions is crucial for international travel. Here are common UK airline baggage allowances:

Baggage Type	Typical Limit (kg)	Equivalent (lbs)
Hand luggage	7-10 kg	15-22 lbs
Checked bag (economy)	23 kg	50.7 lbs
Checked bag (business)	32 kg	70.5 lbs
Excess baggage fee threshold	23-32 kg	50-70 lbs

Travel Weight Tips

Check your airline: Limits vary by carrier and ticket class
Per bag limit: The 23 kg limit is per suitcase, not total
Weigh at home: Avoid airport surprises by weighing luggage before you leave
US airlines: May show limits in pounds (50 lbs = 22.7 kg)

Weight Conversion Tips & Tricks

Quick KG to LBS

Double + 10%: Double the kg and add 10% of the result.

80 kg → 80×2=160, 160+16=176 lbs

Quick LBS to KG

Halve - 10%: Halve the lbs and subtract 10% of the result.

180 lbs → 180÷2=90, 90-9=81 kg

Stone Shortcut

×6.35: Multiply stones by 6.35 to get approximate kg.

12 stone → 12×6.35=76.2 kg

Memorable Benchmarks

Key values:

100 kg ≈ 220 lbs ≈ 15.7 st
70 kg ≈ 154 lbs ≈ 11 st
45 kg ≈ 100 lbs ≈ 7 st

Common Weight Conversion Mistakes

Rounding too early: Use 2.20462, not 2.2, for accurate results on larger weights
Confusing stones: 1 stone = 14 pounds (not 10) - a common error for non-UK visitors
Forgetting the bar: In gym terms, "bench 100 kg" includes the 20 kg bar
Metric/Imperial mixing: Don't combine 500g flour with 1 lb butter in recipes
Baby weight confusion: UK uses lbs/oz conversationally but NHS records in grams

Frequently Asked Questions

1 kilogram equals exactly 2.20462 pounds (lbs). This is the internationally standardised conversion factor used by the NHS, scientific institutions, and official bodies worldwide. For quick mental calculations, rounding to 2.2 lbs per kg gives a close approximation.

70 kg equals 154.32 pounds. In UK stone format, this is 11 stone 0.3 lbs. This is close to the average weight for an adult and represents a healthy BMI for someone around 5'7" to 5'9" tall.

The stone (14 pounds) has been used in Britain since medieval times. Although the UK officially adopted the metric system, cultural tradition keeps stones popular for personal body weight. You'll commonly hear "I weigh 12 stone" rather than "76 kg" in everyday conversation. The NHS uses kilograms in medical records, but many GP surgeries still have scales showing both measurements.

First, multiply the kilograms by 2.20462 to get the total in pounds. Then divide by 14 to get the number of stones. The remainder (multiply the decimal by 14) gives you the remaining pounds. Example: 75 kg × 2.20462 = 165.35 lbs. 165.35 ÷ 14 = 11.81 stones = 11 stone 11.3 lbs.

Most modern UK gyms use kilogram plates and equipment. Standard Olympic barbell plates are colour-coded: 25 kg (red), 20 kg (blue), 15 kg (yellow), 10 kg (green), 5 kg (white), 2.5 kg (red/smaller), and 1.25 kg (chrome). Some older gyms may have pound plates, particularly those with equipment imported from the US.

A healthy weight depends on height and is measured using BMI (Body Mass Index). A BMI of 18.5-24.9 is considered healthy. For example, someone 170 cm (5'7") tall would be healthy between 53-72 kg. Someone 180 cm (5'11") tall would be healthy between 60-81 kg. Use our BMI calculator for personalised results based on your height.

To convert baby weight from pounds and ounces to kilograms: First convert ounces to decimal pounds (oz ÷ 16), add to pounds, then divide by 2.20462. Example: 7 lbs 5 oz = 7 + (5÷16) = 7.3125 lbs = 7.3125 ÷ 2.20462 = 3.32 kg (3,320 grams). The NHS records baby weights in grams.

Standard UK airline checked baggage is typically 23 kg, which equals 50.7 lbs. Business class often allows 32 kg (70.5 lbs). Hand luggage limits are usually 7-10 kg (15-22 lbs). US airlines may show 50 lbs (22.7 kg) instead. Always check your specific airline's policy as limits vary.

Dr. Michael Thompson

BSc (Hons) Biomedical Science, Member of the Royal Society of Medicine

Dr. Thompson has over 15 years of experience in health metrics and measurement standardisation. He previously worked with Public Health England on obesity prevention programmes and regularly consults for NHS trusts on weight management protocols. His expertise includes anthropometric measurements and their practical applications in clinical settings.

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KG to LBS Converter

Kilograms to Pounds Converter

Common Weight Conversions

Pounds to Kilograms Converter

Pounds to Kilograms Reference

Stone & Pounds Converter

Understanding the UK Stone System

Historical Origin

Modern UK Usage

NHS Records

Stone Conversion Reference

Gym Weight Plates Converter

Standard Gym Weight Plates (UK)

Olympic Barbell Standards

Gym Weight Tips

How to Convert Kilograms to Pounds

Step-by-Step Conversion Examples

Example 1: 70 kg to pounds

Example 2: 85 kg to stones

Example 3: 150 lbs to kg

UK Weight Measurement Context

Baby Weight Conversions

NHS Baby Weight Guidelines

Airline Baggage Weight Limits

Travel Weight Tips

Weight Conversion Tips & Tricks

Quick KG to LBS

Quick LBS to KG

Stone Shortcut

Memorable Benchmarks

Common Weight Conversion Mistakes

Frequently Asked Questions

Dr. Michael Thompson

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