Millimeters to the fourth to inches to the fourth
Type a value in mm⁴ to get it in in⁴ instantly.
2.403in⁴
That's 2,037× as stiff as a 10 mm steel rod, while a timber stud is 2.2× stiffer. A solid square beam about 58.86 mm a side would be just as stiff.
Convert the other way: in⁴ to mm⁴
What it means
How stiff is that section?
This is the area moment, about a stated axis. It is not the mass moment of inertia, which has units of kg·m² and belongs to spinning things.
The math
How to convert mm⁴ to in⁴
To convert millimeters to the fourth to inches to the fourth, multiply by 2.403×10⁻⁶.
Example: 1,000,000 mm⁴ × 2.403×10⁻⁶ = 2.40251 in⁴.
In the other direction, 1 in⁴ = 416,231 mm⁴.
Every unit
Your value in every unit
Tables
mm⁴ to in⁴ conversion table
| mm⁴ | in⁴ |
|---|---|
| 1,000 mm⁴ | 0.00240251 in⁴ |
| 10,000 mm⁴ | 0.0240251 in⁴ |
| 100,000 mm⁴ | 0.240251 in⁴ |
| 1,000,000 mm⁴ | 2.40251 in⁴ |
| 10,000,000 mm⁴ | 24.0251 in⁴ |
| 100,000,000 mm⁴ | 240.251 in⁴ |
| 1×10⁹ mm⁴ | 2,402.51 in⁴ |
| 1×10¹⁰ mm⁴ | 24,025.1 in⁴ |
in⁴ to mm⁴ conversion table
| in⁴ | mm⁴ |
|---|---|
| 1,000 in⁴ | 416,231,000 mm⁴ |
| 10,000 in⁴ | 4.162×10⁹ mm⁴ |
| 100,000 in⁴ | 4.162×10¹⁰ mm⁴ |
| 1,000,000 in⁴ | 4.162×10¹¹ mm⁴ |
| 10,000,000 in⁴ | 4.162×10¹² mm⁴ |
| 100,000,000 in⁴ | 4.162×10¹³ mm⁴ |
| 1×10⁹ in⁴ | 4.162×10¹⁴ mm⁴ |
| 1×10¹⁰ in⁴ | 4.162×10¹⁵ mm⁴ |
Quick answers
Quick answers
- How many in⁴ is 1 mm⁴?
- 1 mm⁴ is 2.403×10⁻⁶ in⁴.
- How many in⁴ is 10 mm⁴?
- 10 mm⁴ is 2.403×10⁻⁵ in⁴.
- How many in⁴ is 1,000,000 mm⁴?
- 1,000,000 mm⁴ is 2.40251 in⁴.
The units
About these units
Millimeters to the fourth (mm⁴)
The usual metric unit in structural software and drawings.
Inches to the fourth (in⁴)
The US unit. One in⁴ is 416,231 mm⁴.
Keep going