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UK Metric Association

For a single, rational measurement system

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  • Why metric?
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        • The Moon landings
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    • Shopping
      • Buying food
      • Fair measurement for shoppers
      • Fair measurement for retailers
      • Getting a fair deal
      • Don’t be muddled by unfriendly practices
      • Unit prices
      • Buying home appliances
      • Understanding electrical appliances
      • Unfriendly practices when buying appliances
      • Television and computer screen sizes
      • How to complain
    • Cooking
      • How much to buy
      • Turkey roasting guide
    • Body and health
      • Body weight
      • Body mass index
      • People’s height and weight
      • Baby weight and length
      • Advice for health professionals
    • Motoring
    • Home DIY
      • Metric measuring tapes
      • Dual measuring tapes
      • Kitchen planning
    • Temperature
    • Metric supplies
  • The case for change
    • The mess we are in
    • Problems arising from two systems
      • Fuel consumption
      • Road signage mess
      • Distance information
      • Restriction signs
      • Road contractors
      • Walking and cycling
      • International travellers
    • Which system is better?
    • Principles of changeover
    • Resistance to change
    • What about free speech?
    • Cost of changing
    • Role of government
    • Policy areas
      • Retailing
      • Advertising
      • Road signs
      • Education
      • Weather reports
      • Land and property
  • Road signage
    • Is changing expensive?
    • Metric signs on UK roads
    • International experience
    • When is metric signage legal
    • Speed limits
    • Gallery
  • What you can do
    • Briefing note
    • Write to your MP
    • Speak out
      • Speak out to broadcasters
      • Write to newspapers
    • Stand up for your rights
    • Use metric
    • Donate to UKMA
  • Press
    • Reasons for metrication
    • Objections to metrication
    • Comparison with Australia
    • Metrication timeline
    • Decimalisation v metrication
    • Extracts from key reports
    • Newspaper cuttings
    • Press articles
  • Publications
    • Newsletters
    • A very British mess
    • Metric signs ahead
    • Obtaining UKMA publications
    • Traffic Signs 2.0
    • Measurement unit survey
    • Vehicle dimension signs report
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E

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exa

Prefix of multiple 1018, symbol: E.

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Site Map

  • Home
    • It’s time to move on
  • What is metric?
    • Definitions
      • Metric prefixes
      • Defining constants
      • Base units
      • Derived units
      • Non-SI units
      • SI diagrams
    • Writing metric
    • Speaking metric
    • Sources and references
    • British scientists
    • First international prototypes
    • Australian experience
    • South African experience
    • UK Progress
      • UK metric timeline
      • Building industry
  • Why metric?
    • Metric is easy to use
    • Metric is a proper system
    • Metric is powerful
    • Metric is a world standard
    • People who endorse metrication
      • A physicist and broadcaster
      • A mountaineer
      • An architectural modeller
      • A chef
      • A former nurse
      • An education adviser
      • A software engineer
      • An oral poet
    • Myths
      • Myths about metric
      • Myths about imperial
      • Using metric
      • Myths about British metrication
      • Myths about metric internationally
        • The Moon landings
      • Consumer protection
  • Practical help
    • Shopping
      • Buying food
      • Fair measurement for shoppers
      • Fair measurement for retailers
      • Getting a fair deal
      • Don’t be muddled by unfriendly practices
      • Unit prices
      • Buying home appliances
      • Understanding electrical appliances
      • Unfriendly practices when buying appliances
      • Television and computer screen sizes
      • How to complain
    • Cooking
      • How much to buy
      • Turkey roasting guide
    • Body and health
      • Body weight
      • Body mass index
      • People’s height and weight
      • Baby weight and length
      • Advice for health professionals
    • Motoring
    • Home DIY
      • Metric measuring tapes
      • Dual measuring tapes
      • Kitchen planning
    • Temperature
    • Metric supplies
  • The case for change
    • The mess we are in
    • Problems arising from two systems
      • Fuel consumption
      • Road signage mess
      • Distance information
      • Restriction signs
      • Road contractors
      • Walking and cycling
      • International travellers
    • Which system is better?
    • Principles of changeover
    • Resistance to change
    • What about free speech?
      • John Stuart Mill
    • Cost of changing
    • Role of government
    • Policy areas
      • Retailing
      • Advertising
      • Road signs
      • Education
      • Weather reports
      • Land and property
  • Road signage
    • Is changing expensive?
    • Metric signs on UK roads
    • International experience
    • When is metric signage legal
      • Detailed analysis
    • Speed limits
    • Gallery
  • What you can do
    • Briefing note
    • Write to your MP
      • Sample letters
      • Key issues
    • Speak out
      • Speak out to broadcasters
      • Write to newspapers
    • Stand up for your rights
    • Use metric
    • Donate to UKMA
  • Press
    • Reasons for metrication
    • Objections to metrication
    • Comparison with Australia
    • Metrication timeline
    • Decimalisation v metrication
    • Extracts from key reports
    • Newspaper cuttings
    • Press articles
      • Britain needs a single system of measurement
      • British metrication
      • Don’t make a martyr out of this mismatch
      • Historical perspectives
      • Imperial madness
      • Imperialism is not a force to be reckoned with
      • Let’s not measure ourselves by the imperial past
      • Made in Britain: Not made to measure
      • Measure for measure, a comedy of errors
      • Memo to Maggie
      • Metrication – let’s get on with it
      • Metrication in Ireland
      • On the level: go metric for good measure
      • The metric system in Britain 1851-1979
      • Time to ditch the language of the past
      • Time to stand up to the metric martyrs
      • TSI and metrication
      • Yards, metres, gallons or litres
  • Publications
    • Newsletters
    • A very British mess
      • Content and synopsis
    • Metric signs ahead
      • Content and synopsis
    • Obtaining UKMA publications
    • Traffic Signs 2.0
    • Measurement unit survey
    • Vehicle dimension signs report
  • Legislation
    • Parliamentary debate
  • Style guide
    • Reference card
    • Alphabetical index
  • Consultations
  • About UKMA
    • Constitution
    • Membership of UKMA
      • Joining the UK Metric Association
      • Renew
    • Frequently asked questions
    • Contact
    • Copyright statement
  • Blog

Search this site

  • Home
  • Style guide
    • Alphabetical index
  • What is metric?
    • Definitions
      • Metric prefixes
      • Defining constants
      • Base units
      • Derived units
      • Non-SI units
      • SI diagrams
    • Writing metric
    • Speaking metric
    • Sources and references
    • British scientists
    • First international prototypes
    • Australian experience
    • South African experience
    • UK Progress
      • UK metric timeline
      • Building industry
  • Why metric?
    • Metric is easy to use
    • Metric is a proper system
    • Metric is powerful
    • Metric is a world standard
    • People who endorse metrication
    • Myths
      • Myths about imperial
      • Myths about metric
      • Using metric
      • Myths about British metrication
      • Myths about metric internationally
        • The Moon landings
      • Consumer protection
  • Practical help
    • Shopping
      • Buying food
      • Fair measurement for shoppers
      • Fair measurement for retailers
      • Getting a fair deal
      • Don’t be muddled by unfriendly practices
      • Unit prices
      • Buying home appliances
      • Understanding electrical appliances
      • Unfriendly practices when buying appliances
      • Television and computer screen sizes
      • How to complain
    • Cooking
      • How much to buy
      • Turkey roasting guide
    • Body and health
      • Body weight
      • Body mass index
      • People’s height and weight
      • Baby weight and length
      • Advice for health professionals
    • Motoring
    • Home DIY
      • Metric measuring tapes
      • Dual measuring tapes
      • Kitchen planning
    • Temperature
    • Metric supplies
  • The case for change
    • The mess we are in
    • Problems arising from two systems
      • Fuel consumption
      • Road signage mess
      • Distance information
      • Restriction signs
      • Road contractors
      • Walking and cycling
      • International travellers
    • Which system is better?
    • Principles of changeover
    • Resistance to change
    • What about free speech?
    • Cost of changing
    • Role of government
    • Policy areas
      • Retailing
      • Advertising
      • Road signs
      • Education
      • Weather reports
      • Land and property
  • Road signage
    • Is changing expensive?
    • Metric signs on UK roads
    • International experience
    • When is metric signage legal
    • Speed limits
    • Gallery
  • What you can do
    • Briefing note
    • Write to your MP
    • Speak out
      • Speak out to broadcasters
      • Write to newspapers
    • Stand up for your rights
    • Use metric
    • Donate to UKMA
  • Press
    • Reasons for metrication
    • Objections to metrication
    • Comparison with Australia
    • Metrication timeline
    • Decimalisation v metrication
    • Extracts from key reports
    • Newspaper cuttings
    • Press articles
  • Publications
    • Newsletters
    • A very British mess
    • Metric signs ahead
    • Obtaining UKMA publications
    • Traffic Signs 2.0
    • Measurement unit survey
    • Vehicle dimension signs report
  • Legislation
    • Parliamentary debate
  • Consultations
  • About UKMA
    • Constitution
    • Membership of UKMA
    • Frequently asked questions
    • Contact
  • Twitter
  • Facebook
  • YouTube
  • Blog
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