Square feet per hour to square millimeters per second
Type a value in ft²/h to get it in mm²/s instantly.
301.9mm²/s
That's 2.7× as quick to heat through as copper — nothing on our list beats it. Heat soaks about 1 cm into it in 0.3312 seconds.
Convert the other way: mm²/s to ft²/h
What it means
How fast does heat spread?
Values are typical at room temperature. Diffusivity falls in most metals as they heat up.
The math
How to convert ft²/h to mm²/s
To convert square feet per hour to square millimeters per second, multiply by 25.8064.
Example: 11.7 ft²/h × 25.8064 = 301.935 mm²/s.
In the other direction, 1 mm²/s = 0.0387501 ft²/h.
Every unit
Your diffusivity in every unit
Tables
ft²/h to mm²/s conversion table
| ft²/h | mm²/s |
|---|---|
| 0.1 ft²/h | 2.58064 mm²/s |
| 0.14 ft²/h | 3.6129 mm²/s |
| 0.2 ft²/h | 5.16128 mm²/s |
| 0.5 ft²/h | 12.9032 mm²/s |
| 1 ft²/h | 25.8064 mm²/s |
| 2 ft²/h | 51.6128 mm²/s |
| 4 ft²/h | 103.226 mm²/s |
| 10 ft²/h | 258.064 mm²/s |
| 20 ft²/h | 516.128 mm²/s |
| 50 ft²/h | 1,290.32 mm²/s |
| 100 ft²/h | 2,580.64 mm²/s |
| 200 ft²/h | 5,161.28 mm²/s |
mm²/s to ft²/h conversion table
| mm²/s | ft²/h |
|---|---|
| 0.1 mm²/s | 0.00387501 ft²/h |
| 0.14 mm²/s | 0.00542501 ft²/h |
| 0.2 mm²/s | 0.00775002 ft²/h |
| 0.5 mm²/s | 0.019375 ft²/h |
| 1 mm²/s | 0.0387501 ft²/h |
| 2 mm²/s | 0.0775002 ft²/h |
| 4 mm²/s | 0.155 ft²/h |
| 10 mm²/s | 0.387501 ft²/h |
| 20 mm²/s | 0.775002 ft²/h |
| 50 mm²/s | 1.9375 ft²/h |
| 100 mm²/s | 3.87501 ft²/h |
| 200 mm²/s | 7.75002 ft²/h |
Quick answers
Quick answers
- How many mm²/s is 1 ft²/h?
- 1 ft²/h is 25.8064 mm²/s.
- How many mm²/s is 10 ft²/h?
- 10 ft²/h is 258.064 mm²/s.
- How many mm²/s is 11.7 ft²/h?
- 11.7 ft²/h is 301.935 mm²/s.
The units
About these units
Square feet per hour (ft²/h)
The US engineering unit.
Square millimeters per second (mm²/s)
The handiest size for most materials.
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