Unit of Measure Conversions

UniCon Website - Version History

The UniCon website was conceived, developed and is maintained in the United Kingdom.

* Beta = running under test on local computer; Full = publicly hosted on remote server; N/R = Not Released
Version Release Date* Description
3.8 Beta: Jan2026
Full: Feb2026
  • Aircraft Fuelling page: Reset button now returns focus to the input field
  • Astronomy page: replaced no. of moons per planet with planetary orbital periods
  • Calculator page: improved the appearance of many buttons; added parchment background to the Paste Field to show it can accept user input; added an indicator to show which basic operator (+,−,x,÷) is currently selected; added a field showing the chronological sequence of numbers and operators used; minor positional adjustments
  • Clocks page: altered the layout to conform more closely to the standard page layout; merged the canvas rectangle surrounding the analogue clock dial with the background; changed the border of both clocks to black
  • Easter Sunday page: added a "Last Year" button for completeness
  • Formulae page: clarified the presentation of some formulae
  • Population page: slowed the "Continuous" button repeat rate from 1Hz to 0.5Hz; replaced "X" as the occupied cell symbol with "●"
  • Time page: improved the conversions of months and years; expanded the additional units table
  • All conversion pages plus the Easter Sunday, Elapsed Time, Prime, Random Number and Calculator pages: improved the scope and effectiveness of user input validity checks; background colour highlighting and consistency improvements
  • Added explanations of some stand-alone abbreviations
  • Made the link states (link, visited, focus, hover and active) more consistent
3.7 Beta: Nov2024
Full: Jan2025
  • Calculator page: corrected clear button layout issues when using Safari
  • Hints and Tips page: revised the definition of a Prime Number to exclude "1"
  • Prime Numbers page: corrected action button layout issues
  • Time conversions page: added a link to new Analogue and Digital clocks
3.6 Beta: Sep2023
Full: Sep2023
  • Expanded the Useful Approximations table in the Temperature conversions page
  • Added gravity column to the Solar System table in the Astronomy conversions page
  • Added Body Mass Index calculator and table of ranges to the Miscellany page
  • Rationalised both the number of digits after the decimal point and the precision of scientific notation in all conversion pages
  • Added definitions of Complex, Defective, Excessive, Imaginary, Irrational, Natural, Perfect, Rational, Real and Whole Numbers to the Hints and Tips page
3.5 Beta: Nov2021
Full: Dec2021
  • Added definitions of Average, Factorial, Highest Common Factor, Lowest Common Multiple, Mean, Median and Mode to the Hints and Tips page
  • Listed all definitions alphabetically on the Hints and Tips page
  • Added tables listing the Composition of Common Alloys, the Beaufort Scale of Wind Force and Mohs Scale of Mineral Hardness to the Miscellany page
  • Added formulae describing Combinations and Permutations, the Equations of Motion, simple Pendulums and Projectile trajectories to the Formulae page
  • Added kilometres as a measure of distance to the Astronomy conversions page
  • Added solar system facts and figures to the Astronomy conversions page
  • Added geological time periods for the Earth to the Time conversions page
  • Made various additions and improvements to many Additional Units tables
  • Added a "Back to Top" link on pages that are now larger than two screens deep
  • Added a button at the top of the Miscellany page to a study of how a population might change over time, guided by a set of rules. Setup of both the population on the game board, and the rules that govern the future states of each member of the population, are under full control of the user.
3.4.1 Beta: N/R
Full: Mar2020
  • Added poundforce.inch units to torque conversions
3.4 Beta: Jun2019
Full: Mar2020
  • Simplified the display of version information in all page footers
  • Introduced a more logical order to the navigation bar entries
  • Re-ordered all conversion category lists
  • Moved Constants from the main navigation bar into the Useful Numbers page
  • Moved Alcohol, Blood pressure, Cookery, Barcodes (now with barcode examples), Paper Sizes (now with corresponding envelope sizes) and Map Scales from the Useful Numbers page to the new Miscellany page
  • Added a new Aircraft Fuelling conversions page
  • Added a new Definitions section to the Hints and Tips page
  • Further improved legibility by using a serif font in all appropriate tables
3.3.1 Beta: N/R
Full: Jun2019
  • Improved legibility of formulae by using a serif font
  • Added wine and other fluid measures to the capacity conversions page
3.3 Beta: Mar2019
Full: May2019
  • Added the "Set For Life" lottery to the Random Numbers page
  • Added an Easter Sunday calculator, accessed from the time conversions page
  • Added day-of-the-week determination for dates entered into the elapsed time calculator
  • Added a Help button to all unit conversion pages, the Easter Sunday calculator, the elapsed time calculator, the random number generator, the prime number generator/checker and the basic calculator
  • All files uploaded (via FileZilla) to the FreeHosting.com server; domain name "unitconversions.co.uk" is now active
3.2 Beta: Apr2018
Full: N/R
  • Added a basic calculator, accessed from the main navigation bar
  • Added lottery trademark attributions to the Random Numbers page footer
  • Added an elapsed time calculator, accessed from the time conversions page
  • Added a "Back to Top" link to all pages larger than two screens deep
  • Changed the drop-down conversions list format from one to four columns to reduce list depth. This format now matches the list on both the Home page and the table on the main conversions page.
  • Moved SI number size prefixes from their own page into the Useful Numbers page
3.1 Beta: Mar2017
Full: Apr2018
  • Full user interaction provided by extensive JavaScript programming
  • All files now placed in a single directory to ease file uploading (via WebPlus_10) to the TalkTalk server
3.0 Beta: Jan2017
Full: N/R
  • Website created from scratch using HTML-5 and CSS-3
  • Moderate user interaction provided by exploratory JavaScript programming
2.2 Beta: N/R
Full: Nov2010
  • Website created using Serif WebPlus_10
  • Limited user interaction achieved through some Java programming
1.0 Beta: N/R
Full: Aug2010
  • Website created using Serif WebPlus_8
  • User interaction confined to switching between pages in site

UniCon Website - Browser Testing Status

Version 3.8

* Safari testing takes place after version release
OS / Browser Browser Version Test Date Status Observations
Windows 10 / Chrome 144.0.7559.110 February 2026 Good None
Windows 10 / Edge 144.0.3719.104 February 2026 Good None
Windows 10 / Firefox 147.0.2 February 2026 Good Digital clock font substituted
Windows 10 / Opera One 126.0.5750.59 February 2026 Good None
iPadOS / Safari* 18.6.2 February 2026 Fair Digital clock font substituted; Calculator elements misplaced

Version 3.7

OS / Browser Browser Version Test Date Status Observations
Windows 10 / Chrome 131.0.6778.109 December 2024 Good None
Windows 10 / Edge 131.0.2903.86 December 2024 Good None
Windows 10 / Firefox 133.0.3 December 2024 Good Digital clock font substituted
Windows 10 / Opera One 114.0.5282.235 December 2024 Good None
iPadOS / Safari 18.6.2 January 2026 Good Digital clock font substituted

Version 3.6

OS / Browser Browser Version Test Date Status Observations
Windows 10 / Chrome 116.0.5845.112 September 2023 Good None
Windows 10 / Edge 116.0.1938.69 September 2023 Good None
Windows 10 / Firefox 117.0 September 2023 Good None
Windows 10 / Explorer 22H2 (19045.3324) September 2023 Good None
Windows 10 / Opera One 102.0.4880.33 September 2023 Good None
iPadOS / Safari 16.6 (20G75) September 2023 Fair Layout issues for Prime Number and Calculator pages

Version 3.5

* Statement from Apple Support dated 02Aug2021: "Apple no longer offers Safari updates for Windows. Safari 5.1.7 was the last version made for Windows, and it is now outdated."
Browser Version Test Date Status Observations
Chrome 96.0.4664.45 November 2021 Good None
Edge 96.0.1054.34 November 2021 Good None
Firefox 94.0.2 November 2021 Good None
Explorer 21H1 (19043.1348) December 2021 Good None
Opera 82.0.4227.23 December 2021 Good None
Safari* 5.1.7 (7534.57.2) December 2021 Fair Link to ellipse material fails

Version 3.4

Browser Version Test Date Status Observations
Chrome 80.0.3987.132 March 2020 Good None
Edge 44.18362.449.0 March 2020 Good None
Firefox 73.0.1 March 2020 Good None
Explorer 11.657.18362.0 March 2020 Good None
Opera 67.0.3575.53 March 2020 Good None
Safari 5.1.7 (7534.57.2) March 2020 Fair Link to ellipse material fails

Version 3.3

Browser Version Test Date Status Observations
Chrome 73.0.3683.75 March 2019 Good None
Edge 42.17134.1.0 March 2019 Good None
Firefox 65.0.2 March 2019 Good None
Explorer 11.648.17134.0 March 2019 Good None
Opera 58.0.3135.90 March 2019 Good None
Safari 5.1.7 March 2019 Good None

UniCon Website - Programming Guidelines

In line with good practice, content and presentation are located in separate files.

HTML Content Files

Valid HTML-5! - all HTML files have successfully passed validation to level HTML-5

CSS Presentation Files

Valid CSS-3! - all CSS files have successfully passed validation to level CSS-3

UniCon Website - Accessibility Guidelines and Techniques

Site accessibility has been implemented as follows:

UniCon Website - Restricted Developer Information

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