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Practical guides for real tasks — written by the people building the tools on this site.
Showing 736–756 of 2,464 articles
🎬 Video & Audio
How to Turn Review Notes Into Usable Feedback
Convert scattered timestamped video notes into a chronological list with normalised timecodes and severity grouping an editor can work straight through.
⚖️ Legal
How to Understand Your Non-Compete Clause
Paste a non-compete clause and get a plain-English breakdown of its duration, geographic scope, and restricted-activity language.
👀 Health & Fitness
How to Use the 20-20-20 Rule to Reduce Eye Strain
A configurable 20-20-20 rule timer that alternates work intervals with look-away breaks, helping reduce digital eye strain during long screen sessions.
🎈 Math & Science
How to Use the Ideal Gas Law Correctly
Solve PV=nRT for any variable, use absolute temperature, keep units consistent with the gas constant, and know where real gases stop behaving ideally.
🏷️ SEO & Web
How to Validate JSON-LD Structured Data Offline
Validate JSON-LD structured data against required and recommended fields for Article, Product, Recipe, Event, and more, without sending data to Google.
🏢 Finance Calculators
How to Value a Business on a Multiple
Apply an EBITDA or SDE multiple to value a small business, choose the right earnings basis, and see how much a half-turn either way moves the answer.
🔐 Security & Privacy
How to Verify a Download Against Its Checksum
Hash a file locally and compare it against a published checksum, choose SHA-256 over MD5, and understand what a matching hash does and does not prove.
🦾 Engineering
How to Visualize Forward Kinematics for a 2-Link Robot Arm
Adjust shoulder and elbow joint angles and segment lengths for a simple 2-link robot arm and see the resulting end-effector position update live.
🔆 Image Tools
How to Work in Stops Instead of F-Numbers
Convert between apertures in stops, understand why the f-number sequence goes 1.4, 2, 2.8, and see how T-stops differ from the geometric figure.
🏷️ Finance Calculators
How to Work Out a Consignment Payout
Calculate what a consignment sale actually pays after the split, fees and markdowns, and compare it honestly against selling something yourself.
⛽ Finance Calculators
How to Work Out a Transaction Fee by Hand
Calculate a blockchain transaction fee from gas limit, base fee and priority fee, convert it to fiat, and understand why the limit is a ceiling not a charge.
🧒 Health & Fitness
How to Work Out a Youth Sports Age Group
Find which age bracket a young player falls into using the league's cut-off date, and understand the relative age effect within a single-year band.
📰 Design & Color
How to Work Out Imposition for a Zine
Lay out zine pages so they print in the right order for folding, understand the saddle stitch pairing rule, and always fold a test before the real stock.
🐠 Unit Converters
How to Work Out Real Aquarium Water Volume
Calculate actual aquarium water volume after substrate, hardscape and freeboard, and stop overdosing treatments against the number on the tank.
📜 Developer Tools
How to Work Out What an npm Script Does
Break down an npm script into its commands, understand chaining operators and cross-platform pitfalls, and find the pre and post hooks running invisibly.
🛍️ Finance Calculators
How to Work Out What You Keep After Fees
Calculate net proceeds from a marketplace sale after commission, payment processing and shipping, and price backwards from a target net properly.
📦 Finance Calculators
How to Work Out What Your Contents Are Worth
Estimate rented-home contents value room by room, understand replacement cost against actual cash value, and build the record a claim actually needs.
🚫 Security & Privacy
How to Work Through Data Broker Opt-Outs
Track opt-out requests to data brokers with response deadlines and re-check dates, because removal is usually temporary rather than permanent.
📋 Social Media
How to Write a Listener Survey People Finish
Build a podcast listener survey short enough to complete, free of leading questions, and structured so the answers actually inform a decision.
↩️ Generators
How to Write a Returns Policy You Can Meet
Draft a dropshipping returns policy that matches supplier lead times, separates faulty from unwanted goods, and reflects the consumer law that actually applies.
🍲 Games & Fun
How to Write a Tavern Menu Players Remember
Build a fantasy tavern menu with regional food, prices that fit your setting's economy, and a house special that gives players something to act on.