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    <title>Orpheus — Guides</title>
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    <description>Every tool runs entirely in your browser. Your files are never uploaded to a server.</description>
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      <title>How Much House Can I Afford?</title>
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      <description>The two debt ratios a lender applies, why the monthly payment is only part of the cost, and the places affordability calculators quietly flatter you.</description>
      <pubDate>Mon, 24 Aug 2026 00:00:00 GMT</pubDate>
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      <title>How a Calorie Deficit Actually Works</title>
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      <description>Where the 3,500-calorie rule came from, why weight loss slows on an unchanged deficit, and what the protein and hydration numbers are actually based on.</description>
      <pubDate>Mon, 24 Aug 2026 00:00:00 GMT</pubDate>
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      <title>What Reading Level Should You Write At?</title>
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      <description>What Flesch scores measure and what they cannot see, the grade level general writing should target, and why keyword density stopped being a ranking factor.</description>
      <pubDate>Mon, 24 Aug 2026 00:00:00 GMT</pubDate>
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      <title>Hex, RGB, HSL and OKLCH Explained</title>
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      <description>Why hex and RGB are the same numbers, the reason HSL lightness misleads you, and what OKLCH fixes when you need a palette that steps evenly.</description>
      <pubDate>Mon, 24 Aug 2026 00:00:00 GMT</pubDate>
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      <title>Converting CSV and JSON Without Losing Data</title>
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      <description>The quoting and delimiter rules CSV never standardised, the type information lost in both directions, and the spreadsheet autocorrect that renames data.</description>
      <pubDate>Mon, 24 Aug 2026 00:00:00 GMT</pubDate>
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      <title>Preparing a PDF Before You Send It</title>
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      <description>Page order and rotation, why an unflattened form is still editable, what a watermark does not protect, and the order these steps have to happen in.</description>
      <pubDate>Mon, 24 Aug 2026 00:00:00 GMT</pubDate>
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      <title>What Your Hourly Rate Really Is</title>
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      <description>Which annual-hours figure to divide by, why a contractor rate has to be far higher than the equivalent salary, and the timesheet decimal that costs people money.</description>
      <pubDate>Mon, 24 Aug 2026 00:00:00 GMT</pubDate>
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      <title>MPG, L/100km and the MPG Illusion</title>
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      <description>The reciprocal relationship that makes MPG rank fuel savings wrongly, the two different gallons, and the speed factors worth committing to memory.</description>
      <pubDate>Mon, 24 Aug 2026 00:00:00 GMT</pubDate>
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      <title>Aspect Ratios and Image Dimensions</title>
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      <description>The ratios each platform expects, the difference between cropping and squashing an image, and why a favicon still needs several sizes in one file.</description>
      <pubDate>Mon, 24 Aug 2026 00:00:00 GMT</pubDate>
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      <title>What Minification Actually Saves</title>
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      <description>Why compression already removes most of what a minifier does, the HTML whitespace that is not safe to delete, and when formatting matters more than shrinking.</description>
      <pubDate>Mon, 24 Aug 2026 00:00:00 GMT</pubDate>
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      <title>Which Conversion Factors Are Exact</title>
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      <description>The 1959 treaty that made the inch exactly 25.4 millimetres, the survey foot that disagreed until 2023, and where rounding quietly accumulates.</description>
      <pubDate>Mon, 24 Aug 2026 00:00:00 GMT</pubDate>
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      <title>How to Compress an Image to a Target Size</title>
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      <description>Why a quality slider cannot hit a byte target directly, what the search actually does, and which format to land in when an upload form sets the limit.</description>
      <pubDate>Mon, 24 Aug 2026 00:00:00 GMT</pubDate>
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      <title>How a Due Date Is Actually Calculated</title>
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      <description>Why forty weeks is counted from before conception, what Naegele's rule assumes about your cycle, and how accurate the resulting date turns out to be.</description>
      <pubDate>Mon, 24 Aug 2026 00:00:00 GMT</pubDate>
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      <title>Why a Drive Shows Less Space Than the Box</title>
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      <description>The 1000-versus-1024 disagreement behind every missing gigabyte, why the gap widens as drives grow, and what positional notation has to do with it.</description>
      <pubDate>Mon, 24 Aug 2026 00:00:00 GMT</pubDate>
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      <title>Watts, Kilowatt-Hours and Running Costs</title>
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      <description>The difference between power and energy that makes electricity bills confusing, which appliances actually dominate a bill, and what standby really costs.</description>
      <pubDate>Mon, 24 Aug 2026 00:00:00 GMT</pubDate>
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      <title>Tipping, Splitting Bills and Unit Pricing</title>
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      <description>What tip percentages are calculated on, the fair way to divide an uneven bill, and why the larger pack is not reliably the cheaper one.</description>
      <pubDate>Mon, 24 Aug 2026 00:00:00 GMT</pubDate>
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      <title>Fixing Text Pasted From a PDF</title>
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      <description>Why a PDF has no paragraphs to copy, how to rejoin lines without destroying real breaks, and the invisible characters that survive a paste.</description>
      <pubDate>Mon, 24 Aug 2026 00:00:00 GMT</pubDate>
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      <title>How GPA and Final Grades Are Calculated</title>
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      <description>Why credit hours weight a GPA, how to work out the grade you need on a final, and the difference between weighted and unweighted scales.</description>
      <pubDate>Mon, 24 Aug 2026 00:00:00 GMT</pubDate>
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      <title>How Subnet Masks Actually Work</title>
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      <description>What the slash notation counts, how to find the usable host range, and why two addresses in every subnet can never be assigned to a machine.</description>
      <pubDate>Mon, 24 Aug 2026 00:00:00 GMT</pubDate>
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      <title>How Property Area Is Measured</title>
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      <description>Why two listings for the same house disagree on floor area, what an acre is derived from, and which walls are inside the number you are quoted.</description>
      <pubDate>Mon, 24 Aug 2026 00:00:00 GMT</pubDate>
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      <title>Running Pace, Splits and Race Times</title>
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      <description>Converting between pace and speed, what an even split really costs, and why race-time predictors based on a single distance overstate the longer ones.</description>
      <pubDate>Mon, 24 Aug 2026 00:00:00 GMT</pubDate>
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      <title>How Age Is Counted Around the World</title>
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      <description>The East Asian reckoning that made everyone a year older at new year, what happens to a leap-day birthday in law, and why dog years are not seven to one.</description>
      <pubDate>Mon, 24 Aug 2026 00:00:00 GMT</pubDate>
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      <title>Is It Safe to Upload Documents Online?</title>
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      <description>What actually happens to a file you upload to an online PDF or image converter, how long it is kept, who can read it, and how to avoid uploading at all.</description>
      <pubDate>Sat, 22 Aug 2026 00:00:00 GMT</pubDate>
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      <title>What a PDF Reveals About You — A Checklist</title>
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      <description>PDFs carry author names, edit history, GPS data and text you thought you redacted. A practical checklist for finding it before you send the file to anyone.</description>
      <pubDate>Sat, 22 Aug 2026 00:00:00 GMT</pubDate>
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      <title>PNG vs JPG vs WebP: Which to Actually Use</title>
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      <description>A practical guide to choosing between PNG, JPG and WebP: what each format is good at, what it destroys, and the rule that gets it right nearly every time.</description>
      <pubDate>Sat, 22 Aug 2026 00:00:00 GMT</pubDate>
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      <title>Why Your File Got Bigger After Converting</title>
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      <description>Converting an image or PDF sometimes doubles the file size instead of shrinking it. Here is what causes it, and how to get the reduction you expected.</description>
      <pubDate>Sat, 22 Aug 2026 00:00:00 GMT</pubDate>
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      <title>How to Reduce PDF File Size (Without Ruining It)</title>
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      <description>Why PDFs get huge, which part of the file is really to blame, and the order to try fixes in so you shrink the document without wrecking the pages.</description>
      <pubDate>Sat, 22 Aug 2026 00:00:00 GMT</pubDate>
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      <title>What Your Photos Reveal: EXIF Data Explained</title>
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      <description>Photos carry the exact place and time they were taken, the device that took them, and often more. What EXIF contains, who can read it, and how to strip it.</description>
      <pubDate>Sat, 22 Aug 2026 00:00:00 GMT</pubDate>
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      <title>Why Your JSON Is Invalid (And How to Fix It)</title>
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      <description>The eight things that actually break JSON, why editors accept them anyway, and how to read a parser error that only tells you a character position.</description>
      <pubDate>Sat, 22 Aug 2026 00:00:00 GMT</pubDate>
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      <title>The Unit Conversions People Get Wrong</title>
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      <description>Area is not length squared by accident, five foot nine is not 5.9 feet, and an ounce is three different units. The conversion errors that actually cost money.</description>
      <pubDate>Sat, 22 Aug 2026 00:00:00 GMT</pubDate>
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      <title>Margin vs Markup — The Pricing Mistake</title>
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      <description>Margin and markup describe the same profit and disagree on the denominator. Getting them backwards is the most expensive arithmetic error in small business pricing.</description>
      <pubDate>Sat, 22 Aug 2026 00:00:00 GMT</pubDate>
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      <title>How Compound Interest Actually Works</title>
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      <description>Why compounding is slow then sudden, what the rule of 72 is really telling you, and how the same curve that builds savings makes credit card debt so hard to escape.</description>
      <pubDate>Sat, 22 Aug 2026 00:00:00 GMT</pubDate>
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      <title>How to Store Dates and Times Correctly</title>
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      <description>Why UTC is the default answer, when it is the wrong one, and the specific bugs that come from storing a local time, a date, or a future appointment the easy way.</description>
      <pubDate>Sat, 22 Aug 2026 00:00:00 GMT</pubDate>
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      <title>What Actually Makes a Password Strong</title>
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      <description>Length beats complexity, the substitution tricks everyone uses are already in the cracking dictionaries, and why the advice you were given at work is out of date.</description>
      <pubDate>Sat, 22 Aug 2026 00:00:00 GMT</pubDate>
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      <title>What a Hash Function Actually Does</title>
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      <description>Why hashing is not encryption, what makes MD5 and SHA-1 unsafe, and why a password database should never contain a plain SHA-256 hash either.</description>
      <pubDate>Sat, 22 Aug 2026 00:00:00 GMT</pubDate>
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      <title>How Much Sleep You Actually Need</title>
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      <description>What the research says about sleep duration, why cycle timing matters less than consistency, and why you cannot tell how tired you are once you are short of sleep.</description>
      <pubDate>Sat, 22 Aug 2026 00:00:00 GMT</pubDate>
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      <title>Is BMI Accurate? What It Can and Cannot Tell You</title>
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      <description>BMI was designed to describe populations, not individuals. What it genuinely predicts, where it fails badly, and which measurements are worth taking alongside it.</description>
      <pubDate>Sat, 22 Aug 2026 00:00:00 GMT</pubDate>
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      <title>Why Your Text Shows Weird Characters</title>
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      <description>The specific pattern of mojibake tells you exactly which encoding mistake happened. What each one means, why it happens, and how to fix it properly.</description>
      <pubDate>Sat, 22 Aug 2026 00:00:00 GMT</pubDate>
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      <title>Estimating Materials Without Running Short</title>
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      <description>Why every material has a different waste allowance, which ones you must buy in one batch, and the specific mistakes that cost a second trip to the shop.</description>
      <pubDate>Sat, 22 Aug 2026 00:00:00 GMT</pubDate>
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      <title>A4 vs Letter, and Why Documents Print Wrong</title>
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      <description>A4 and US Letter look interchangeable and differ enough to clip an edge. What the ISO series is built on, and how to fix a document made for the wrong one.</description>
      <pubDate>Sat, 22 Aug 2026 00:00:00 GMT</pubDate>
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      <title>Cooking Conversions That Actually Ruin Recipes</title>
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      <description>Cups are not a fixed weight, three different tablespoons are in use, and fluid ounces are not ounces. The conversions that matter and the ones that quietly do not.</description>
      <pubDate>Sat, 22 Aug 2026 00:00:00 GMT</pubDate>
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      <title>How Much to Save, and Where to Put It</title>
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      <description>Why the order matters more than the percentage, what an emergency fund is actually for, and the point at which saving harder stops beating starting earlier.</description>
      <pubDate>Sat, 22 Aug 2026 00:00:00 GMT</pubDate>
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      <title>Regular Expressions, Explained Properly</title>
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      <description>The dozen constructs that cover almost everything, why greedy matching surprises people, and the pattern shape that can hang a server.</description>
      <pubDate>Sat, 22 Aug 2026 00:00:00 GMT</pubDate>
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