STRUCTURAL
Second moment of area
Area moment of inertia for section stiffness.
Try a decimal, 1e-9, 1/3, or 5 1/2.
Resultft⁴ → mm⁴Convert foot to the fourth power to millimetre to the fourth power
EVERYDAY · ENGINEERING · SCIENCE
Unit conversion. Made clear.
Start with a familiar unit, type a value, and get a dependable answer with sensible precision. Fractions and scientific notation are welcome.
520units ready to convert
HOW IT IS CALCULATED
Convert through metre to the fourth power
Enter a foot to the fourth power value to calculate millimetre to the fourth power with full internal precision before display rounding.
Display precisionAuto · 12 significant digits
Auto keeps up to 12 significant digits, trims unnecessary zeroes, and switches to scientific notation for extreme magnitudes.
QUICK REFERENCE
All units in this quantity
| Unit | Symbol | Converted value |
|---|---|---|
| millimetre to the fourth powerfrom ft⁴ | mm⁴ | Interactive |
| centimetre to the fourth powerfrom ft⁴ | cm⁴ | Interactive |
| metre to the fourth powerfrom ft⁴ | m⁴ | Interactive |
| inch to the fourth powerfrom ft⁴ | in⁴ | Interactive |
| foot to the fourth powerfrom ft⁴ | ft⁴ | Interactive |
SI symbols follow international notation. U.S. and Imperial measures are labelled separately where their values differ.