How Many Keratin Capsules Do You Need? Calculation by Length & Density

October 28, 2026

How many hair extension capsules do you need for a perfect result? Too few strands lead to visible transitions and thin ends. Too many create unnecessary weight. Here is how Nicehair technologists calculate it.

What Determines The Number Of Strands?

1. Your Natural Hair Density

This is the main factor.

Thin hair: scalp is visible at the parting. You need fewer capsules.
Medium density: ponytail 5-7 cm in circumference - the most common type.
Thick / very thick hair: ponytail over 8 cm. You need 20-30% more capsules to blend your own thick hair seamlessly.

2. Starting Length and Desired Length

The bigger the jump, the more capsules you need to hide your own cut line. A bob (15-20 cm) to 45 cm needs much more hair than 40 cm to 50 cm.

3. Desired Effect: Thickening, Lengthening, or Super Volume

Thickening: you keep your length, but want more density. Minimum number.
Lengthening: you want both length and natural density. Standard number.
Super Volume: Hollywood effect with maximum density from roots to ends. Requires +30% capsules.

Calculation Table: 50, 100, 150, 200 Capsules - Who Is It For?

Our standard Nicehair capsule is 0.8-1g - the safest weight.

Your Hair & Goal	Capsules	Result
Thin hair, correction of temples	50-70 pcs	Spot thickening
Bob to 45-50 cm, medium density	100-130 pcs	Natural lengthening - bestseller
Thick hair + length 60-70 cm	150-200 pcs	Full volume + long length

50-70 pcs: Thickening the Temple Zones

Not a full extension. Perfect for adding volume around the face where hair is always thinner, fixing a bad haircut, or refreshing a previous extension.

100-130 pcs: From Bob to 45-50 cm

The most popular option at Nicehair. This amount is enough to completely hide a blunt bob / lob and create a natural, even density. If your bob is very thick and blunt, choose 130.

150-200 pcs: Thick Hair + Length 60-70 cm

If you dream of 60-70 cm, you cannot do it with 100 capsules. The ends will look see-through. For thick natural hair, 180-200 capsules are needed for a perfect blend and really thick, expensive-looking ends. For super volume on 60-70 cm, we recommend 200-250 pcs.

Why You Shouldn't Save On The Number Of Capsules

1. Visible transition. Your short hair will stick out from under the long strands.
2. Thin, stingy ends. The main sign of cheap extensions. Long hair is beautiful only when ends are thick.
3. Wrong weight distribution. Fewer, but heavy capsules damage your own hair. Many small 0.8g capsules distribute weight evenly and are safer.