Metrication UK
@metrication.uk
Going Metric in the United Kingdom 🇬🇧 metrication.uk 📏 ⚖️ 🌡️ 🚗
All things related to the UK's still-to-be-completed metrication programme
All things related to the UK's still-to-be-completed metrication programme
On this day 50 years ago, breakfast cereals went #metric.
On 1 November 1975, METRIC PACK sizes ⚖️ were introduced for flaked breakfast cereals 🌽❄️. Imperial pack sizes were withdrawn on 30 June 1978.
#OTD #metricsystem #metrication
On 1 November 1975, METRIC PACK sizes ⚖️ were introduced for flaked breakfast cereals 🌽❄️. Imperial pack sizes were withdrawn on 30 June 1978.
#OTD #metricsystem #metrication
November 1, 2025 at 9:40 AM
On this day 50 years ago, breakfast cereals went #metric.
On 1 November 1975, METRIC PACK sizes ⚖️ were introduced for flaked breakfast cereals 🌽❄️. Imperial pack sizes were withdrawn on 30 June 1978.
#OTD #metricsystem #metrication
On 1 November 1975, METRIC PACK sizes ⚖️ were introduced for flaked breakfast cereals 🌽❄️. Imperial pack sizes were withdrawn on 30 June 1978.
#OTD #metricsystem #metrication
For 50 years now, the familiarity of the 1 kg bag of sugar has made it easy to visualise body weight ⚖️ changes in kilograms
To visualise weight changes in stones 🪨, we have ... oh!
The sale of #METRIC PACKs of sugar was first permitted 50 years ago today, on 1 October 1975
#thinkmetric #OTD #KISS
To visualise weight changes in stones 🪨, we have ... oh!
The sale of #METRIC PACKs of sugar was first permitted 50 years ago today, on 1 October 1975
#thinkmetric #OTD #KISS
October 1, 2025 at 5:51 AM
For 50 years now, the familiarity of the 1 kg bag of sugar has made it easy to visualise body weight ⚖️ changes in kilograms
To visualise weight changes in stones 🪨, we have ... oh!
The sale of #METRIC PACKs of sugar was first permitted 50 years ago today, on 1 October 1975
#thinkmetric #OTD #KISS
To visualise weight changes in stones 🪨, we have ... oh!
The sale of #METRIC PACKs of sugar was first permitted 50 years ago today, on 1 October 1975
#thinkmetric #OTD #KISS
No 50th anniversary special #stamps from the Post Office today, but here's an event day cover ✉️, from 50 years ago, commemorating the Post Office's 🏤 very own M-Day.
September 29, 2025 at 6:08 AM
No 50th anniversary special #stamps from the Post Office today, but here's an event day cover ✉️, from 50 years ago, commemorating the Post Office's 🏤 very own M-Day.
#OTD On this day, 50 years ago, the Post Office 🏤 went #metric 📏.
On 29 September 1975, all ⚖️ weight-based 📮📦 postal tariffs switched to the #metric system.
POSTER: "Mail goes metric from 29 Sept"
metrication.uk/post-office/
On 29 September 1975, all ⚖️ weight-based 📮📦 postal tariffs switched to the #metric system.
POSTER: "Mail goes metric from 29 Sept"
metrication.uk/post-office/
September 29, 2025 at 6:08 AM
#OTD On this day, 50 years ago, the Post Office 🏤 went #metric 📏.
On 29 September 1975, all ⚖️ weight-based 📮📦 postal tariffs switched to the #metric system.
POSTER: "Mail goes metric from 29 Sept"
metrication.uk/post-office/
On 29 September 1975, all ⚖️ weight-based 📮📦 postal tariffs switched to the #metric system.
POSTER: "Mail goes metric from 29 Sept"
metrication.uk/post-office/
2025 is the 50th anniversary of Rugby's switch to the #metric system for all measurements.
In 1975, the 25-yard line became the 22-metre line, and the crossbar height was set at 3.0 metres.
passport.world.rugby/laws-of-the-...
In 1975, the 25-yard line became the 22-metre line, and the crossbar height was set at 3.0 metres.
passport.world.rugby/laws-of-the-...
September 6, 2025 at 3:59 PM
2025 is the 50th anniversary of Rugby's switch to the #metric system for all measurements.
In 1975, the 25-yard line became the 22-metre line, and the crossbar height was set at 3.0 metres.
passport.world.rugby/laws-of-the-...
In 1975, the 25-yard line became the 22-metre line, and the crossbar height was set at 3.0 metres.
passport.world.rugby/laws-of-the-...
METRIC PACKS of Homepride flour in the "Homepride Selection" catalogue leaflet, 1979
bsky.app/profile/oldu...
bsky.app/profile/oldu...
August 17, 2025 at 10:58 PM
METRIC PACKS of Homepride flour in the "Homepride Selection" catalogue leaflet, 1979
bsky.app/profile/oldu...
bsky.app/profile/oldu...
Sugar in 1 kg METRIC PACKS first appeared in the shops 49 years ago, in the summer of 1976:
bsky.app/profile/oldu...
bsky.app/profile/oldu...
August 17, 2025 at 12:08 PM
Sugar in 1 kg METRIC PACKS first appeared in the shops 49 years ago, in the summer of 1976:
bsky.app/profile/oldu...
bsky.app/profile/oldu...
This is the leaflet mentioned in the advert:
metrication.uk/shopping/foo...
metrication.uk/shopping/foo...
August 16, 2025 at 7:48 PM
This is the leaflet mentioned in the advert:
metrication.uk/shopping/foo...
metrication.uk/shopping/foo...
At that time, metric restriction signs could only be used in combination with, and positioned below, an equivalent imperial sign.
44 years later, despite dual-unit signs being compulsory on all new signs installed since 2016, imperial-only signs are still in use.
44 years later, despite dual-unit signs being compulsory on all new signs installed since 2016, imperial-only signs are still in use.
August 13, 2025 at 4:18 PM
At that time, metric restriction signs could only be used in combination with, and positioned below, an equivalent imperial sign.
44 years later, despite dual-unit signs being compulsory on all new signs installed since 2016, imperial-only signs are still in use.
44 years later, despite dual-unit signs being compulsory on all new signs installed since 2016, imperial-only signs are still in use.
#OTD 44 years ago, #metric restriction signs 🚗 were introduced on 🇬🇧 UK roads.
From 13 August 1981, metric units 📏 could be used for the first time to indicate height, width and length restrictions on 🇬🇧 UK road signs.
Weight restriction signs went metric on the same day.
#metrication #roadsigns
From 13 August 1981, metric units 📏 could be used for the first time to indicate height, width and length restrictions on 🇬🇧 UK road signs.
Weight restriction signs went metric on the same day.
#metrication #roadsigns
August 13, 2025 at 4:18 PM
#OTD 44 years ago, #metric restriction signs 🚗 were introduced on 🇬🇧 UK roads.
From 13 August 1981, metric units 📏 could be used for the first time to indicate height, width and length restrictions on 🇬🇧 UK road signs.
Weight restriction signs went metric on the same day.
#metrication #roadsigns
From 13 August 1981, metric units 📏 could be used for the first time to indicate height, width and length restrictions on 🇬🇧 UK road signs.
Weight restriction signs went metric on the same day.
#metrication #roadsigns
In 1969, Minister of Transport, Richard Marsh, announced plans to switch road 🚗 speed limit signs to kilometres per hour.
hansard.parliament.uk/%E2%80%8CCom...
hansard.parliament.uk/%E2%80%8CCom...
July 26, 2025 at 4:11 PM
In 1969, Minister of Transport, Richard Marsh, announced plans to switch road 🚗 speed limit signs to kilometres per hour.
hansard.parliament.uk/%E2%80%8CCom...
hansard.parliament.uk/%E2%80%8CCom...
#OTD 57 years ago, the Government confirmed that 1975 would be the end date for the UK's #metrication programme.
Speed limits were to go #metric in 1973, but that date was postponed.
50 years after the 1975 target date, we are still waiting for the Government to complete its metrication programme.
Speed limits were to go #metric in 1973, but that date was postponed.
50 years after the 1975 target date, we are still waiting for the Government to complete its metrication programme.
July 26, 2025 at 4:11 PM
#OTD 57 years ago, the Government confirmed that 1975 would be the end date for the UK's #metrication programme.
Speed limits were to go #metric in 1973, but that date was postponed.
50 years after the 1975 target date, we are still waiting for the Government to complete its metrication programme.
Speed limits were to go #metric in 1973, but that date was postponed.
50 years after the 1975 target date, we are still waiting for the Government to complete its metrication programme.
For fun, here's an expanded version of the diagram, with a few more imperial units added, like cubic inches.
How many people know all the imperial conversion factors?
For anyone daunted by learning the metric system 📏, the equivalent #metric chart is included alongside.
How many people know all the imperial conversion factors?
For anyone daunted by learning the metric system 📏, the equivalent #metric chart is included alongside.
July 26, 2025 at 3:13 PM
For fun, here's an expanded version of the diagram, with a few more imperial units added, like cubic inches.
How many people know all the imperial conversion factors?
For anyone daunted by learning the metric system 📏, the equivalent #metric chart is included alongside.
How many people know all the imperial conversion factors?
For anyone daunted by learning the metric system 📏, the equivalent #metric chart is included alongside.
The 440 yards (402.34 m) hurdles in 1966, was replaced by the 400 metres hurdles in 1970.
The 220 yards (201.17 m) in 1966, was replaced by the 200 metres in 1970.
The 220 yards (201.17 m) in 1966, was replaced by the 200 metres in 1970.
July 19, 2025 at 7:38 PM
The 440 yards (402.34 m) hurdles in 1966, was replaced by the 400 metres hurdles in 1970.
The 220 yards (201.17 m) in 1966, was replaced by the 200 metres in 1970.
The 220 yards (201.17 m) in 1966, was replaced by the 200 metres in 1970.
55 years ago this month, the Commonwealth Games went #metric.
In July 1970, athletics and swimming events switched to the metric system.
In track events 🏃, metres replaced yards.
In field events, metres (to 2 decimal places) 📏 replaced feet and inches.
In swimming 🏊, metres replaced yards.
In July 1970, athletics and swimming events switched to the metric system.
In track events 🏃, metres replaced yards.
In field events, metres (to 2 decimal places) 📏 replaced feet and inches.
In swimming 🏊, metres replaced yards.
July 19, 2025 at 7:38 PM
55 years ago this month, the Commonwealth Games went #metric.
In July 1970, athletics and swimming events switched to the metric system.
In track events 🏃, metres replaced yards.
In field events, metres (to 2 decimal places) 📏 replaced feet and inches.
In swimming 🏊, metres replaced yards.
In July 1970, athletics and swimming events switched to the metric system.
In track events 🏃, metres replaced yards.
In field events, metres (to 2 decimal places) 📏 replaced feet and inches.
In swimming 🏊, metres replaced yards.
The report noted:
"the serious loss of time incurred by English school children in having to learn the complicated system of tables of existing weights and measures.
... no less than one year’s school time would be saved if the metrical system were taught in place of that now in use." 🏫
#metric
"the serious loss of time incurred by English school children in having to learn the complicated system of tables of existing weights and measures.
... no less than one year’s school time would be saved if the metrical system were taught in place of that now in use." 🏫
#metric
July 1, 2025 at 4:03 PM
The report noted:
"the serious loss of time incurred by English school children in having to learn the complicated system of tables of existing weights and measures.
... no less than one year’s school time would be saved if the metrical system were taught in place of that now in use." 🏫
#metric
"the serious loss of time incurred by English school children in having to learn the complicated system of tables of existing weights and measures.
... no less than one year’s school time would be saved if the metrical system were taught in place of that now in use." 🏫
#metric
#OnThisDay #OTD 55 years ago, the first British decimal stamps 🏤📮 were issued.
A 10p stamp might not seem "high value" today, but when stamps went #decimal in 1971, a 2nd class stamp ✉️ was 2½p.
The 10p, 20p and 50p stamps served as 2/-, 4/- and 10/- stamps until D-Day - 15 February 1971.
A 10p stamp might not seem "high value" today, but when stamps went #decimal in 1971, a 2nd class stamp ✉️ was 2½p.
The 10p, 20p and 50p stamps served as 2/-, 4/- and 10/- stamps until D-Day - 15 February 1971.
June 17, 2025 at 8:53 AM
#OnThisDay #OTD 55 years ago, the first British decimal stamps 🏤📮 were issued.
A 10p stamp might not seem "high value" today, but when stamps went #decimal in 1971, a 2nd class stamp ✉️ was 2½p.
The 10p, 20p and 50p stamps served as 2/-, 4/- and 10/- stamps until D-Day - 15 February 1971.
A 10p stamp might not seem "high value" today, but when stamps went #decimal in 1971, a 2nd class stamp ✉️ was 2½p.
The 10p, 20p and 50p stamps served as 2/-, 4/- and 10/- stamps until D-Day - 15 February 1971.
#OnThisDay #OTD 60 years ago, President of the Board of Trade, Douglas Jay announced the Government's intention for the UK to switch to the #metricsystem 📏 ⚖️ within 10 years.
#metrication
#metrication
May 24, 2025 at 1:39 PM
#OnThisDay #OTD 60 years ago, President of the Board of Trade, Douglas Jay announced the Government's intention for the UK to switch to the #metricsystem 📏 ⚖️ within 10 years.
#metrication
#metrication
The posters highlight how metrology is driving innovation across multiple disciplines, topics covered by the posters include quantum technologies ⚛️ and advancements in health 🏥, industry 🏭, and energy ⚡.
May 20, 2025 at 8:08 AM
The posters highlight how metrology is driving innovation across multiple disciplines, topics covered by the posters include quantum technologies ⚛️ and advancements in health 🏥, industry 🏭, and energy ⚡.
20 May 2025 is World Metrology Day.
#OnThisDay #OTD 150 years ago, 17 nations signed the International Treaty of the Metre 📜📏, aka the Metre Convention.
This marked the establishment of the BIPM, the 🌐International Bureau of Weights and Measures ⚖️📏.
#BIPM150 #metrication #metric system
#OnThisDay #OTD 150 years ago, 17 nations signed the International Treaty of the Metre 📜📏, aka the Metre Convention.
This marked the establishment of the BIPM, the 🌐International Bureau of Weights and Measures ⚖️📏.
#BIPM150 #metrication #metric system
May 20, 2025 at 8:08 AM
20 May 2025 is World Metrology Day.
#OnThisDay #OTD 150 years ago, 17 nations signed the International Treaty of the Metre 📜📏, aka the Metre Convention.
This marked the establishment of the BIPM, the 🌐International Bureau of Weights and Measures ⚖️📏.
#BIPM150 #metrication #metric system
#OnThisDay #OTD 150 years ago, 17 nations signed the International Treaty of the Metre 📜📏, aka the Metre Convention.
This marked the establishment of the BIPM, the 🌐International Bureau of Weights and Measures ⚖️📏.
#BIPM150 #metrication #metric system
#OnThisDay in 1975, rail traffic went #metric.
On 5 May 1975, #rail traffic switched to metric measurements for loads, capacities, tare weights and brake force.
On 5 May 1975, #rail traffic switched to metric measurements for loads, capacities, tare weights and brake force.
May 5, 2025 at 5:16 PM
#OnThisDay in 1975, rail traffic went #metric.
On 5 May 1975, #rail traffic switched to metric measurements for loads, capacities, tare weights and brake force.
On 5 May 1975, #rail traffic switched to metric measurements for loads, capacities, tare weights and brake force.
#OnThisDay in 1668, "An Essay Towards a Real Character, and a Philosophical Language", by John Wilkins, was published by the @royalsociety.org .
It proposed a universal #decimal system of weights and measures, including a new Standard unit of length 📏, almost exactly equal to our modern day #metre.
It proposed a universal #decimal system of weights and measures, including a new Standard unit of length 📏, almost exactly equal to our modern day #metre.
April 13, 2025 at 12:57 PM
#OnThisDay in 1668, "An Essay Towards a Real Character, and a Philosophical Language", by John Wilkins, was published by the @royalsociety.org .
It proposed a universal #decimal system of weights and measures, including a new Standard unit of length 📏, almost exactly equal to our modern day #metre.
It proposed a universal #decimal system of weights and measures, including a new Standard unit of length 📏, almost exactly equal to our modern day #metre.
The switch to the #metric system for timber was just one element of a comprehensive #metrication programme for the construction industry 🏗️🏠 which began in 1968 and was largely complete by 1972.
April 1, 2025 at 10:38 AM
The switch to the #metric system for timber was just one element of a comprehensive #metrication programme for the construction industry 🏗️🏠 which began in 1968 and was largely complete by 1972.