Guides & conversion know-how
The formulas behind our tools, worked through with real examples — so you understand the numbers, not just copy them.
Understanding ABV: How Alcohol Content Is Calculated from OG and FG
What original and final gravity measure, the formula that turns them into alcohol by volume, and why your homebrew's strength is decided before fermentation even finishes.
Read the guide- 🖨️
3D Print Filament: Estimating Length, Weight and Cost Before You Print
How filament diameter and material density connect grams, metres and dollars — so you can price a print and know if the spool will last.
3D PrintingMakingCost - ⏱️
Cron Expressions Explained: From Every Minute to Once a Year
The five cron fields, what the special characters mean, and a cheat sheet of ready-to-use schedules — so you stop guessing whether your job runs when you think.
Developer ToolsDevOpsScheduling - 🎨
HEX, RGB, HSL and OKLCH: A Designer's Guide to Color Spaces
What each color notation actually means, why HSL lies about brightness, and how OKLCH finally makes perceptually even color ramps possible on the web.
DesignCSSColor - 🍳
Sous Vide Time and Temperature: A Practical Guide to Perfect Results
How sous vide temperature sets doneness and time sets tenderness, with a reference chart for steak, chicken, eggs and more — plus the food-safety basics.
CookingSous VideFood Science - 🏋️
How to Calculate Your One-Rep Max (and Why Every Formula Disagrees)
Epley, Brzycki, Lombardi and more — how 1RM estimation formulas work, which is most accurate, and how to use your max to program training.
StrengthFitnessProgramming - 🎛️
BPM to Milliseconds: Setting Delay and Reverb Times by the Numbers
How to convert tempo to delay time in milliseconds, the formula behind note divisions, and why dotted and triplet delays sit in the groove.
Music ProductionMixingDelay - 🧁
Cups to Grams: The Complete Baking Conversion Guide
Why 1 cup of flour isn't 1 cup of sugar, how ingredient density changes the math, and a reference table for converting US cups to grams accurately.
BakingCookingConversions