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Practical guides for real tasks — written by the people building the tools on this site.
Showing 1,114–1,134 of 2,465 articles
calculator Math & Science
How to Solve a Differential Equation
Solve a differential equation with a browser-friendly preview so the structure and approximate behavior are easier to inspect.
📐 Math & Science
How to Solve a Two-Variable Linear Programming Problem
Enter an objective function and constraints to find the optimal solution for a two-variable linear programming problem, entirely in your browser.
💧 Math & Science
How to Solve Fluid Pressure With Bernoulli's Equation
Enter fluid velocity, height, and pressure at two points to solve for an unknown using Bernoulli's equation, entirely in your browser.
text-lines Text & Writing
How to Split Text Into Sentences
Split pasted text into sentences with punctuation-aware rules and copy-ready output so you can work with clean sentence blocks.
⚖️ Generators
How to Structure an Affidavit Before Swearing It
Draft an affidavit with numbered statements of fact, a proper deponent identification and a jurat block, ready for a lawyer to review and a commissioner to witness.
📊 Data & CSV
How to Summarize Survey CSV Exports by Question
Upload a survey response CSV and get an automatic percentage breakdown for each question, entirely in your browser.
text Text & Writing
How to Tag Parts of Speech
Tag common sentence words by noun, verb, adjective, adverb, pronoun, and preposition so grammar review is quicker.
🌀 Math & Science
How to Tell if a Flow Is Laminar or Turbulent
Calculate Reynolds number from velocity, characteristic length and viscosity, and read what the value implies for pipe flow and other geometries.
🆔 Developer Tools
How to Tell Which UUID Version You Have
Read a UUID's version and variant from its own digits, decode any embedded timestamp, and know which version belongs in a database primary key.
🎮 Games & Fun
How to Test a Controller for Stick Drift
Check every button, trigger and analogue axis on a game controller, and read the resting values that reveal stick drift before it ruins a game.
🔔 Developer Tools
How to Test Browser Notification Permissions
Check the three notification permission states, request them from a user gesture, and exercise the denied path your code probably handles badly.
code Developer Tools
How to Test Glob Patterns
Test glob patterns against real file paths and see which files match, exclude, or fail the wildcard rules before you save the config.
⏱️ Education
How to Time a Read-Aloud and Calculate Words Per Minute
Time a reading passage and automatically calculate words-per-minute reading fluency, entirely in your browser.
⛓️ Network
How to Trace a CNAME Chain to Its Final Record
Follow a CNAME chain hop by hop to the address it resolves to, count the latency each hop costs, and understand why the apex can't hold one.
📕 Text & Writing
How to Track Chapter Lengths in a Manuscript
Log word counts per chapter against a target, spot the outliers that signal a structural problem, and stop treating word count as a measure of quality.
👶 Health & Fitness
How to Track Childhood Milestones Sensibly
Record a child's development against the broad age ranges health bodies publish, and know which patterns are worth raising at a check-up.
📈 Social Media
How to Track Competitor Channel Growth
Keep a watchlist of YouTube channels and log subscriber and upload figures over time, so growth reads as a trend rather than a single snapshot.
🥚 Productivity
How to Track Daily Egg Count and Laying Rate
Log daily egg counts per flock to track total production and average lay rate per hen, entirely in your browser.
globe Productivity
How to Track Domain Expiry Dates
Track domain names, expiry dates, and renewal reminders in one offline workspace so important domains do not surprise you.
🐄 Productivity
How to Track Milk Yield Per Animal
Record milk yield with days in milk so animals are comparable, and spot the sudden drops that signal a health problem before it becomes obvious.
🛢️ Productivity
How to Track Oil Changes by Time and Distance
Service intervals specify a distance and a time limit, and whichever arrives first is the one that counts — which for low-mileage cars is always the clock.