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LJ HairLab

all in one place

Free hair-care tools

44 calculators, quizzes, checkers and planners. Everything runs in your browser — no account needed.

Relaxed Hair

Relaxed Hair guide →

Hair Growth

Hair Growth guide →

Natural Hair

Natural Hair guide →
Builder

Wash Day Routine Builder

Answer six questions and get a step-by-step wash day routine plus a 4-week protein and clarifying calendar.

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Quiz

Protein or Moisture Quiz

A wet-strand stretch test plus symptom check tells you whether your hair needs protein, moisture or a break.

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Calculator

Wash Frequency Calculator

Find how often to wash, co-wash and clarify for your scalp, hair type and lifestyle.

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Quiz

LOC vs LCO Method Picker

Six questions decide whether the LOC or LCO layering order suits your hair.

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Checker

Shedding vs Breakage Checker

Tell normal shedding from breakage by looking at the strands you lose.

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Calculator

Hair Product Cost-per-Use

See what each product costs per use, per month and per year.

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Tracker

Hair Journal

Log wash days, products and results, and see which products work best.

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Planner

Wash Day Planner

Pick your wash days and get a repeating schedule of cleanse, deep condition, protein and clarify days.

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Calculator

Hair Care Budget Calculator

Add up products, salon visits and styles to see what your hair costs per month and per year.

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Calculator

Salon vs Home Hair Care Calculator

Compare the yearly cost of salon services with doing the same care at home.

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Calculator

Wash Day Time Calculator

Add up the steps you do on wash day and see how long it really takes — and where to save time.

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Builder

Hair Care Calendar Generator

Combine wash days, protein, trims, touch-ups and takedowns into one printable calendar.

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Builder

Travel Hair Care Checklist

Build a packing list of hair products and tools for your trip length, climate and style.

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Protective Styles

Protective Styles guide →

Ingredients

Ingredients guide →