Guides
Plain-English explainers that pair with LK Forge's free tools — from converting time zones across cities to the moon's phases, the sun's seasons, and the weather. Read the one you need, then open the matching tool to see it for yourself.
Time Zones
How to Convert a Time Between Any Two Cities
The three-step method behind "what's 3 PM UK time in Dubai?" — with worked examples and how to find a meeting slot that suits both sides.
Read guideUTC and GMT Explained
What the global reference clock is, how offsets like UTC+5:30 work, why IANA names beat abbreviations, and how to convert your local time to UTC.
Read guideWhy Time Differences Change: Daylight Saving
What DST is, which regions use it and when, why the gap between two cities isn't always fixed, and how to keep recurring meetings on time.
Read guideRelated tool: Time Zone Converter (GMT, BST, EST…)
Moon
Moon Phases Explained
The eight phases of the moon, why they happen, and how to tell waxing from waning at a glance.
Read guideWhat Is a Blue Moon (and a Supermoon)?
The two meanings of "blue moon", what makes a supermoon, and why neither is actually blue or huge.
Read guideFull Moon Names: Strawberry, Harvest & More
What each month's full moon is called and why — Wolf, Strawberry, Harvest — plus Blue Moons and Supermoons.
Read guideWhy Do Tides Follow the Moon?
How the moon (and sun) pull the oceans into two bulges, and why you get two high tides a day.
Read guideSun & Seasons
Stargazing
Weather
Weather Alerts
Watch vs Warning vs Advisory
What a weather watch, warning, advisory and emergency each mean — and exactly what to do when the NWS issues one.
Read guideWhat Is a Winter Storm Warning?
How a Winter Storm Warning differs from a Watch and an Advisory, what triggers one, and what to do.
Read guideWhat Is an Extreme Heat Warning?
Extreme Heat Warning vs Watch vs Heat Advisory, why it follows the heat index, and how to stay safe.
Read guideWhat Is a Red Flag Warning?
The fire-weather alert explained — the conditions that trigger it and what you should and shouldn't do.
Read guideMeasurement
Metric vs Imperial: What's the Difference?
How the two measurement systems work, who uses which, why the US never switched, and the exact factors worth memorising.
Read guideUnit Conversion Chart
Quick-reference tables for length, weight, volume, temperature, area and speed — metric to imperial and back, exact factors marked.
Read guideScientific Notation
Multiplying Scientific Notation
The one rule — multiply the coefficients, add the exponents — with worked examples, negative exponents, and the normalization step everyone forgets.
Read guideDividing Scientific Notation
Divide the coefficients, subtract the exponents — top minus bottom — plus the opposite-direction normalization and the order mistake to avoid.
Read guideAdding & Subtracting Scientific Notation
Why the exponents must match before you can add, how to line two numbers up on the same power of ten, and what cancellation does to the answer.
Read guideFiles & Formats
How to Change a File Format
Why renaming the extension doesn't convert anything, the three ways to actually convert a file, and the fastest route for HEIC, WebP, PNG, JPG and PDF.
Read guideHow to Convert a Picture to PDF on iPhone
Four free ways, no app needed — the Files app's Create PDF, the hidden print-to-PDF trick, Notes scanning for paper documents, and a browser converter that merges photos into one PDF.
Read guidePages to PDF: Convert an Apple Pages Document
Export from Pages on Mac or iPhone in seconds — and the free iCloud route plus the zip-preview fallback for a .pages file on Windows.
Read guideWidgets
Spin the Wheel Widget for Your Website
Add a free spin-the-wheel widget — a random picker wheel — to any site with one line of code: copy the iframe, paste it in, and preload your own options.
Read guideWorld Clock Widget for Your Website
Add a free live multi-city world clock widget — set your cities with ?cities=, match your theme with ?theme=dark, one line of code.
Read guideHow to Add a Word Unscrambler to Your Website
Embed a free full word unscrambler on any site with one line of code — copy the iframe and optionally preload letters with ?q=.
Read guideHow to Add a Word Search Solver to Your Website
Embed a free word search solver on any site with one line of code — visitors paste a grid and word list and every hidden word is highlighted.
Read guideHow to Add a 2048 Game to Your Website
Embed a free, playable 2048 game — including its built-in AI Hint and Auto-Play solver — on any site with one line of code.
Read guideHow to Add a Polygon Area Calculator to Your Website
Embed a free polygon area calculator on any site with one line of code — area from coordinates (shoelace), a triangle’s three sides (Heron), or a regular polygon, with a labelled diagram and steps.
Read guide