Hair Extensions: How Many Grams Do You Really Need?

One of the most common questions clients ask is: “How many grams of hair do I need?” The answer depends on your natural density, length, desired volume, and the extension method you choose.

As a certified hair extensions specialist in NYC, here is the ultimate guide to understanding grams, weight, and how much hair you actually need for a beautiful, full, natural result.

What Are Extension Grams?

Grams refer to the weight of the hair. The more grams, the more volume and fullness you’ll have. Each method (K-tip, I-tip, tape-ins, wefts) comes in different gram amounts.

How Many Grams Do You Need for Fullness?

If you love your length but want fuller ends or more volume, you need:

• 60–80 grams for fine hair
• 80–120 grams for medium hair

This is ideal for:

• Thin ends
• Side volume
• Filling in gaps
• Blending layers

How Many Grams Do You Need for Length?

Creating length requires significantly more hair so the extensions blend naturally and don’t look stringy.

• 120–150 grams for fine to medium hair
• 150–200 grams for medium to thick hair
• 200+ grams for maximum thickness or dramatic length

Gram Guide by Desired Result

✔ Subtle Volume

• 60–80g

✔ Full Volume (Popular Choice)

• 100–120g

✔ Natural Length + Volume

• 120–150g

✔ Long, Thick Hair (Rapunzel)

• 180–220g+

Grams Needed by Hair Type

Fine Hair

• Fullness: 60–80g
• Length: 100–140g

Medium Hair

• Fullness: 80–100g
• Length: 140–180g

Thick Hair

• Fullness: 100–120g
• Length: 180–220g+

Grams by Extension Method

Each method requires different amounts:

1. K-Tips (Keratin Bonds)

• 100–150g for length
• 60–100g for fullness

2. I-Tips (Microlinks)

• 120–180g for length
• 60–100g for volume

3. Tape-In Extensions

• 20–40 pieces = 50–100g (volume)
• 40–60 pieces = 100–150g (length)

4. Weft / Hand-Tied / Machine Wefts

• 2 rows = 100–150g (natural length)
• 3 rows = 150–200g (maximum fullness)

Variables That Affect Gram Amount

• Your natural density
• Desired length
• Haircut (blunt = more grams)
• Texture (fine vs coarse)
• Color blend (solid vs dimensional)

This is why a consultation is essential—grams are personalized.

Why Using Too Few Grams Looks Fake

• Ends look stringy
• Extensions don’t blend
• Too much separation
• Visible sections

The right grams ensure your extensions look natural and seamless.

Why More Grams Look Better (and Last Longer)

• Fuller, thicker ends
• Better blending with layers
• Holds curls longer
• More styling options
• Less tension on each piece

Frequently Asked Questions

Can I start with fewer grams and add more later?

Yes—many clients start with fullness and add length later.

Do I need the same grams every time?

No. Your needs change based on haircut, length, and desired look.

Are grams the same for all brands?

No. DreamCatchers, Hotheads, Babe, Bellami, and other brands vary in grams per bundle.

Can I mix methods?

Yes—ex: K-tips for blending + wefts for fullness.

Book Your Extension Consultation in NYC

If you’re unsure how many grams you need, I can measure your density, your goals, and recommend the perfect amount for natural, seamless results. Book your extension consultation at Fabi Pro Beauty in Midtown Manhattan.

Book now →