binclock.com — Binary Clock, Read the Time in Binary

More on binclock

Digital Clock Digital A plain 24-hour digital clock for comparison with the binary display. Analog Clock Analog A classic analog clock face showing the current time.

binclock.com shows the current time as a binary clock — columns of lit dots you read in binary-coded decimal — with a decimal readout to help you learn. For comparison there's also a digital and an analog clock. All free, in your browser.

A fun way to learn binary

Binary clocks are a favourite of programmers and makers, and a great hands-on way to get comfortable with binary numbers. Our guides explain BCD, how to read the clock, and the history of binary timekeeping.

From our guides

Browse all articles →

Clocks for programmers Binary, Analog, and Digital Clocks Compared A clear comparison of binary, analog, and digital clocks, covering how each encodes the time, what they teach, how easy they are to read, and when to choose each. 6 min read Binary & BCD explained Binary Clock vs BCD Clock: What's the Difference? A side-by-side comparison of true binary clocks and BCD clocks, explaining how each encodes the time, how to tell them apart, and how to read both with worked examples. 6 min read Learning binary numbers Binary Numbers Explained: Base Two Made Simple A from-scratch explanation of binary numbers: how base two works, why each place value doubles, and how to read and write ones and zeros, with worked examples. 6 min read Learning binary numbers How to Convert Decimal to Binary (Step by Step) A step-by-step guide to converting decimal numbers into binary using two reliable methods, with worked examples and tips for practising on a live binary clock. 6 min read Binary clock history The History of Binary Clocks and Binary Numbers A tour through the history of binary clocks and the binary system itself, from Leibniz's seventeenth-century breakthrough to the LED novelty timepieces of today. 5 min read Reading a binary clock How to Read a Binary Clock: A Beginner's Guide A friendly step-by-step guide to reading a binary clock, explaining the 8-4-2-1 dot values, how each column of lights encodes a digit, and how to decode the full time. 6 min read Reading a binary clock Reading Hours, Minutes, and Seconds on a Binary Clock A focused guide to reading the hours, minutes, and seconds on a binary clock, breaking down each column pair with the 8-4-2-1 method and a full worked example. 6 min read Learning binary numbers How to Teach Kids Binary Using a Binary Clock Practical activities for parents and teachers to teach children binary using a binary clock, including the 8-4-2-1 finger game, worked examples, and a simple lesson plan. 5 min read

Frequently asked questions

Is binclock.com free?

Yes — free, no signup, no download.

Do I need to know binary?

No — a decimal readout shows the time in normal numbers, and our guides teach you how to read the dots.

Does it work on mobile?

Yes — it works in any modern browser on any device.