How many inches is 21 cm?

21 centimetres = 8.27 inches. Divide cm by 2.54 to convert.

What is 21 cm in feet and inches?

21 cm ≈ 0′8″ — useful for human height.

Divide by 2.5: 21 ÷ 2.5 = 8.4 inches. Exact: 8.27 inches.

21 cm equals 8.27 in.

Formula: cm × 0.393701 = in

21 cm =

8.27in

Feet

0.69 ft

Millimetres

210 mm

Computed to 3 decimal places using factor 0.393701. For engineering or safety-critical uses verify against a calibrated reference.

Reference table

centimetres (cm)	inches (in)	Feet	Millimetres
15 cm	5.91 in	0.49 ft	150 mm
16 cm	6.3 in	0.52 ft	160 mm
17 cm	6.69 in	0.56 ft	170 mm
18 cm	7.09 in	0.59 ft	180 mm
19 cm	7.48 in	0.62 ft	190 mm
20 cm	7.87 in	0.66 ft	200 mm
21 cm	8.27 in	0.69 ft	210 mm
22 cm	8.66 in	0.72 ft	220 mm
23 cm	9.06 in	0.75 ft	230 mm
24 cm	9.45 in	0.79 ft	240 mm
25 cm	9.84 in	0.82 ft	250 mm
26 cm	10.24 in	0.85 ft	260 mm
27 cm	10.63 in	0.89 ft	270 mm

By use case

Small objects

pocket / tool

Screens / TVs

display diagonals

Height

human stature

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FAQ

How many inches is 21 cm?: 21 centimetres = 8.27 inches. Divide cm by 2.54 to convert.
What is 21 cm in feet and inches?: 21 cm ≈ 0′8″ — useful for human height.
How to convert 21 cm to inches mentally?: Divide by 2.5: 21 ÷ 2.5 = 8.4 inches. Exact: 8.27 inches.

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