Joules per square meter to millijoules per square centimeter
Type a value in J/m² to get it in mJ/cm² instantly.
4mJ/cm²
Nothing on our list is smaller: the dose that reddens skin is 6.3× higher. A 1 mW/cm² source would need about 4 seconds to deliver it.
Convert the other way: mJ/cm² to J/m²
What it means
How big a dose is that?
Fluence is energy per area. Irradiance — watts per square meter — is the rate; multiply by the exposure time to get fluence.
The math
How to convert J/m² to mJ/cm²
To convert joules per square meter to millijoules per square centimeter, multiply by 0.1.
Example: 40 J/m² × 0.1 = 4 mJ/cm².
In the other direction, 1 mJ/cm² = 10 J/m².
Every unit
Your dose in every unit
Tables
J/m² to mJ/cm² conversion table
| J/m² | mJ/cm² |
|---|---|
| 0.1 J/m² | 0.01 mJ/cm² |
| 1 J/m² | 0.1 mJ/cm² |
| 5 J/m² | 0.5 mJ/cm² |
| 10 J/m² | 1 mJ/cm² |
| 25 J/m² | 2.5 mJ/cm² |
| 40 J/m² | 4 mJ/cm² |
| 100 J/m² | 10 mJ/cm² |
| 250 J/m² | 25 mJ/cm² |
| 500 J/m² | 50 mJ/cm² |
| 1,000 J/m² | 100 mJ/cm² |
| 5,000 J/m² | 500 mJ/cm² |
mJ/cm² to J/m² conversion table
| mJ/cm² | J/m² |
|---|---|
| 0.1 mJ/cm² | 1 J/m² |
| 1 mJ/cm² | 10 J/m² |
| 5 mJ/cm² | 50 J/m² |
| 10 mJ/cm² | 100 J/m² |
| 25 mJ/cm² | 250 J/m² |
| 40 mJ/cm² | 400 J/m² |
| 100 mJ/cm² | 1,000 J/m² |
| 250 mJ/cm² | 2,500 J/m² |
| 500 mJ/cm² | 5,000 J/m² |
| 1,000 mJ/cm² | 10,000 J/m² |
| 5,000 mJ/cm² | 50,000 J/m² |
Quick answers
Quick answers
- How many mJ/cm² is 1 J/m²?
- 1 J/m² is 0.1 mJ/cm².
- How many mJ/cm² is 10 J/m²?
- 10 J/m² is 1 mJ/cm².
- How many mJ/cm² is 40 J/m²?
- 40 J/m² is 4 mJ/cm².
The units
About these units
Joules per square meter (J/m²)
The SI form, ten times the mJ/cm² figure.
Millijoules per square centimeter (mJ/cm²)
The standard for UV dose and laser fluence.
Keep going