Millijoules per square centimeter to kilojoules per square meter
Type a value in mJ/cm² to get it in kJ/m² instantly.
0.4kJ/m²
That's about the same as a UV water disinfection dose. A 1 mW/cm² source would need about 40 seconds to deliver it.
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 mJ/cm² to kJ/m²
To convert millijoules per square centimeter to kilojoules per square meter, multiply by 0.01.
Example: 40 mJ/cm² × 0.01 = 0.4 kJ/m².
In the other direction, 1 kJ/m² = 100 mJ/cm².
Every unit
Your dose in every unit
Tables
mJ/cm² to kJ/m² conversion table
| mJ/cm² | kJ/m² |
|---|---|
| 0.1 mJ/cm² | 0.001 kJ/m² |
| 1 mJ/cm² | 0.01 kJ/m² |
| 5 mJ/cm² | 0.05 kJ/m² |
| 10 mJ/cm² | 0.1 kJ/m² |
| 25 mJ/cm² | 0.25 kJ/m² |
| 40 mJ/cm² | 0.4 kJ/m² |
| 100 mJ/cm² | 1 kJ/m² |
| 250 mJ/cm² | 2.5 kJ/m² |
| 500 mJ/cm² | 5 kJ/m² |
| 1,000 mJ/cm² | 10 kJ/m² |
| 5,000 mJ/cm² | 50 kJ/m² |
kJ/m² to mJ/cm² conversion table
| kJ/m² | mJ/cm² |
|---|---|
| 0.1 kJ/m² | 10 mJ/cm² |
| 1 kJ/m² | 100 mJ/cm² |
| 5 kJ/m² | 500 mJ/cm² |
| 10 kJ/m² | 1,000 mJ/cm² |
| 25 kJ/m² | 2,500 mJ/cm² |
| 40 kJ/m² | 4,000 mJ/cm² |
| 100 kJ/m² | 10,000 mJ/cm² |
| 250 kJ/m² | 25,000 mJ/cm² |
| 500 kJ/m² | 50,000 mJ/cm² |
| 1,000 kJ/m² | 100,000 mJ/cm² |
| 5,000 kJ/m² | 500,000 mJ/cm² |
Quick answers
Quick answers
- How many kJ/m² is 1 mJ/cm²?
- 1 mJ/cm² is 0.01 kJ/m².
- How many kJ/m² is 10 mJ/cm²?
- 10 mJ/cm² is 0.1 kJ/m².
- How many kJ/m² is 40 mJ/cm²?
- 40 mJ/cm² is 0.4 kJ/m².
The units
About these units
Millijoules per square centimeter (mJ/cm²)
The standard for UV dose and laser fluence.
Kilojoules per square meter (kJ/m²)
For solar exposure and weathering tests.
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