Free Hollow Box (HSS) Moment of Inertia & Section Properties Calculator
Compute Area, Centroid, Moment of Inertia, Elastic and Plastic Section Moduli, and Radius of Gyration instantly. Enter dimensions manually or load standard steel databases.
⚙ Configuration
Section Geometry
Steel
Cold-Formed
Concrete
I-Section
Channel
T-Section
Angle
Double Angle
Box Section
Pipe
Dbl Channel
Builtup I Cov
Hybrid I
Hybrid U
Unit System
mm
cm
m
in
ft
Standard Profile Catalog
Manual Input (No Catalog)
▼
Dimension Settings
Depth/Diameter (t3)
t3
mm
Width (t2)
t2
mm
Thickness (tf)
tf
mm
Web Thickness (tw)
tw
mm
Section Properties Results
Property
Sym
Value
Unit
Cross-sectional Area
A
3744
mm²
Centroid location (X-axis)
xc
50
mm
Centroid location (Y-axis)
yc
75
mm
Strong Moment of Inertia
Ix
11282272
mm⁴
Weak Moment of Inertia
Iy
5881472
mm⁴
Strong Elastic Modulus
Sx
150430.2933
mm³
Weak Elastic Modulus
Sy
117629.44
mm³
Strong Radius of Gyration
rx
54.8947
mm
Weak Radius of Gyration
ry
39.6347
mm
Polar Moment of Inertia
J
17163744
mm⁴
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