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Practical guides for real tasks — written by the people building the tools on this site.
Showing 1,933–1,953 of 2,464 articles
🗓️ Productivity
How to Build a Daily Schedule That Actually Fits
Build a daily schedule from time blocks, automatically sorted with overlap warnings, and export as text, without a calendar app's meeting-only assumptions.
🧊 Design & Color
How to Build a Frosted-Glass CSS Card
Design a frosted-glass card with live sliders for blur, opacity, radius, and border, previewed over a real gradient, then copy the CSS declaration directly.
⏳ Date & Time
How to Build a Live Countdown Timer to Any Date
Create a live, embeddable countdown timer to any event date and time, with a copyable shareable summary, without writing any JavaScript yourself.
📚 Education
How to Build APA, MLA, and Chicago Citations
Build APA, MLA, or Chicago citations for websites, books, and journal articles by filling in a few fields, with a live preview you can copy straight into your paper.
🎞️ Developer
How to Build CSS Keyframe Animations With a Live Preview
Generate CSS @keyframes animations - bounce, spin, pulse, shake, and fade - with adjustable duration, timing, and iteration count, previewed before you copy any code.
🏘️ Finance Calculators
How to Calculate a Rental Property's Cap Rate
Calculate a rental property's capitalization rate from its income, expenses, and value to compare deals on equal footing before you make an offer.
📈 Finance Calculators
How to Calculate Net Profit on a Stock Trade
Calculate net profit and return on investment for a stock trade, including buy/sell prices, share count, and trading fees, for a real, fee-adjusted number.
📈 Finance Calculators
How to Calculate Profit on a Crypto Trade
Calculate net profit and return on investment for a cryptocurrency trade, including buy and sell prices and exchange fees, before you assume a trade was a win.
📐 Math & Science
How to Calculate the Area of Any Shape Fast
Find the area of a rectangle, circle, triangle, or trapezoid instantly with the formula shown alongside the result, so you can double-check your own math.
📅 Date & Time
How to Calculate Your Anniversary Milestones
Track years and days since any start date, see a countdown to your next anniversary, and get a full list of upcoming year and day-count milestones.
⚖️ Health & Fitness
How to Calculate Your BMI and What It Means
Calculate your Body Mass Index from height and weight, in metric or imperial units, with the healthy weight range for your height shown alongside it.
🔥 Health & Fitness
How to Calculate Your BMR With Three Formulas
Calculate your Basal Metabolic Rate using the Mifflin-St Jeor, Harris-Benedict, and Katch-McArdle formulas side by side, to see how much they actually agree.
🩸 Health & Fitness
How to Calculate Your Cholesterol Ratio
Calculate your total cholesterol to HDL ratio, and optionally LDL:HDL, from a recent lab result, with reference range guidance to help you read the numbers.
📋 Finance Calculators
How to Calculate Your Debt-to-Income Ratio
Calculate your debt-to-income ratio from monthly income and debt payments, see front-end vs back-end DTI, and know where lenders draw the approval line.
🔥 Finance Calculators
How to Calculate Your FIRE Number
Calculate your FIRE number and how many years until financial independence, based on your savings, contributions, and expected return, not just a rough guess.
💰 Finance Calculators
How to Calculate Your Net Worth With a Simple Worksheet
List your assets and liabilities in a simple worksheet and see your net worth update instantly, without spreadsheet formulas or a financial advisor.
🎓 Education
How to Calculate Your Semester and Cumulative GPA
Calculate your semester GPA from letter grades and credit hours, and combine it with a previous cumulative GPA to see your new overall GPA, without spreadsheet formulas.
🖨️ Image
How to Change a PNG's DPI for Print
Update a PNG's DPI metadata for print workflows without touching a single pixel of the actual image, when a print shop rejects a file for the wrong DPI tag.
🎚️ Audio
How to Change Audio Speed Without Changing Pitch
Speed up or slow down a track without the chipmunk or slow-motion pitch shift, using time-stretching that keeps the tempo change independent of tone.
👶 Health & Fitness
How to Check a Baby's Weight Percentile
Estimate your baby's weight-for-age percentile using WHO growth standard reference values for ages 0-24 months, without waiting for the next checkup to ask.
♈ Games & Fun
How to Check a Daily Horoscope Reading for Fun
Pick your zodiac sign and see a general daily reading, deterministically selected from a fixed local set, for entertainment only — no account, no upsell.