Built for the hair most curly advice ignores.
Calculators, charts, and printables for coily, kinky, and 4C hair — the textures where generic curly-hair advice stops working. All free, no account required.
Hair Shrinkage Calculator
Your hair is longer than it looks. Enter your shrunken and stretched length to get your exact shrinkage percentage — and what that number means for coily and 4C hair, where shrinkage often passes 70%.
Length & Growth
2 toolsIf your hair feels like it stays the same length no matter what, start here. These two separate what your hair is actually doing from what it looks like it's doing.
Hair Shrinkage Calculator
Get your exact shrinkage percentage from your shrunken and stretched length — and see how it compares across curl patterns.
Hair Growth Calculator
Find out how long it takes to reach your goal length at your own growth rate — not the half-inch-a-month average someone quoted you.
Protective Styles & Locs
5 printablesReference sheets you can keep open on your phone or print and set beside you while you install, retighten, or take a style down.
Bantu Knots Quick Reference
Section sizes, knot tension, and dry times on one page you can follow while you style.
Passion Twists Quick Reference
Hair amounts, install time, and takedown timing for passion twists, all at a glance.
Sisterlocks Cost Breakdown
What sisterlocks actually cost — establishment, retightening, and the ongoing upkeep most quotes leave out.
Sisterlocks vs. Dreadlocks
Side by side on size, install method, maintenance, and cost — so you can tell which one you actually want.
Sisterlocks vs. Microlocs
These two get confused constantly. Here's what separates them on technique, cost, and upkeep.
Products & Ingredients
2 printablesBefore you spend money on another product, check what the research actually says about it.
Rice Water: Benefits & Side Effects
What rice water can do for your hair, what it can't, and the protein-overload signs to watch for.
Biotin Daily Intake Levels
Established adequate intake by age and life stage, with the research behind each number.
In development
Here's what we're building next. These are the questions readers ask us most, and none of them have a good answer anywhere else yet.
Curl Profile Quiz
Answer questions about your porosity, density, and texture, and get a routine built for your hair instead of a generic one.
Breakage vs. Growth
"Why does my hair stay the same length?" Usually it's breakage, not growth. This tells you which one you're dealing with.
Protective Style Planner
How long to keep a style in, when to take it down, and how much tension your edges can safely take.
Length Retention Tracker
Log your length month over month and see whether you're actually keeping the length you grow.
Can't find what you need?
Tell us which tool would help you most. We build these based on what readers ask for, and we read every reply.