Ulna Length To Height Calculator

This ulna length to height calculator is used in medical anthropometry and forensic science to estimate an individual’s stature based on their ulna bone measurements.

The ulna, one of the two main bones in the forearm, has proven to be a reliable predictor of overall height due to its proportional relationship with total body height.

• 24 cm Ulna Length to Height: For Male: 156.62 cm (5’2″) and for Female: 156.72 cm (5’2″)
• 25 cm Ulna Length to Height: Male: 161.225 cm (5’3″) and for Female: 161.175 cm (5’3″)

Ulna Length To Height Calculator

Ulna Length (cm)	Male Height (cm)	Female Height (cm)
23	152.015	152.257
24	156.620	156.716
25	161.225	161.175
26	165.830	165.634
27	170.435	170.093
28	175.040	174.012
29	179.645	178.930
30	184.250	183.848
31	188.855	188.766
32	193.460	193.684
33	198.065	198.602
34	202.670	203.520
35	207.275	208.438
36	211.880	213.356

Ulna Length to Height Chart

Gender	Age Group	Ulna Length (cm)	Estimated Height Range (cm)
Male	18-30	25-27	165-175
Male	31-50	26-28	170-180
Male	51-70	27-29	175-185
Male	71+	26-28	170-180
Female	18-30	23-25	155-165
Female	31-50	24-26	160-170
Female	51-70	25-27	165-175
Female	71+	24-26	160-170
Male	All Ages	30	185-195
Female	All Ages	29	180-190

Ulna Length To Height Formula

The most used equations are:

For Males: Height (cm) = 4.605 × Ulna length (cm) + 46.1

For Females: Height (cm) = 4.459 × Ulna length (cm) + 49.7

For a male with an ulna length of 27 cm:

Height = (4.605 × 27) + 46.1
Height = 124.335 + 46.1
Height = 170.435 cm

How to Determine Height from Ulna Length?

To accurately measure ulna length and determine height:

• Locate Measurement Points:
  • Find the olecranon process (elbow tip)
  • Identify the styloid process (wrist bump)
• Measurement Technique:
  • Flex the elbow to 90 degrees
  • Use measuring tape or calipers
  • Measure from point to point precisely

A forensic anthropologist measures an unknown skeleton’s ulna at 26.3 cm.

Using the male formula:

Height = (4.605 × 26.3) + 46.1 = 167.21 cm

What is the length of the radius and ulna?

The radius and ulna typically maintain specific proportions:

• Ulna: Usually 25-27 cm in adult males
• Radius: Approximately 23-25 cm in adult males
• Ratio: Ulna is typically 1.1 times longer than radius

In an adult male with:

Ulna length: 26.5 cm

Radius length: 24.1 cm

The ratio is 26.5/24.1 = 1.09, which fits the expected proportion.

References:

• National Center for Biotechnology Information (NCBI) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3573298/
• American Journal of Physical Anthropology https://onlinelibrary.wiley.com/journal/10968644

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