hello, gorgeous hair
Free hair-care tools for relaxed, natural & textured hair
Check ingredient lists, find your curl pattern and porosity, plan your length goals and stretch your relaxer — with tools built on real formulas and cited research.
✦ 44 free tools ✦ No sign-up ✦ Private by default
new here?
Start with these three
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Step 1
Know your curl
Eight quick questions find your pattern, from 2A waves to 4C coils.
Hair Type Quiz → -
Step 2
Test your porosity
It decides which oils, butters and conditioners your hair actually drinks.
Porosity Test → -
Step 3
Check your products
Paste any ingredient list and see what helps — and what holds you back.
Ingredient Checker →
most loved
Our favorite tools
Hair Product Ingredient Checker
Paste an ingredient list and see sulfates, silicones, drying alcohols, proteins and oils flagged in seconds.
Try it freeHair Type Quiz
Eight quick questions about your wet curl pattern, shrinkage and coil size to find your type from 2a to 4c.
Try it freeHair Porosity Test
Ten questions about drying time, product build-up and chemical history to estimate low, normal or high porosity.
Try it freeHair Growth Calculator
See when you will reach shoulder, bra-strap or waist length based on growth rate, retention and trims.
Try it freeBraiding Hair Calculator
Find out how many packs of braiding hair you need for box braids, knotless, twists or locs — with cost and install time.
Try it freeFlat Iron & Silk Press Temperature Guide
Get a safe flat iron temperature range and pass count for your strand thickness, damage level and plate type.
Try it freebrowse by topic
What's on your mind?
welcome to the lab
Honest answers for your crown
We build free tools that answer real hair questions — how long until bra-strap length, is this conditioner protein-free, how many packs do I buy — and we show the math behind every answer. No miracle claims, no sign-ups, just tools that respect your hair and your time.
Real formulasEvery tool shows how it works — and its limits.
Cited researchStudies and safety reviews behind every claim. Our policy.
Private by defaultTools run in your browser; trackers stay on your device.
xo, the LJ Hair Lab team
About us