Megajoule per square meter (MJ/m²)
Exactly one million J/m². Used for daily solar irradiation.
What is a megajoule per square meter?
- Symbol
- MJ/m²
- Quantity
- Heat Density
- Unit system
- SI
- Definition
- Exactly one million J/m². Used for daily solar irradiation.
- Exact
- Yes, the value is exact by definition
- Source
- SI Brochure, 9th edition (BIPM, 2019)
Common applications
Used in weather and agricultural data for daily solar irradiation, and in fire engineering for fire load per floor area.
Megajoule per square meter in other heat density units
- 1 MJ/m² = 1000000 J/m²Joule per square meter
- 1 MJ/m² = 1000 kJ/m²Kilojoule per square meter
- 1 MJ/m² ≈ 0.2777777778 kWh/m²Megajoule per square meter to Kilowatt-hour per square meter converter
- 1 MJ/m² ≈ 88.05509184 BTU/ft²BTU per square foot
- 1 MJ/m² ≈ 23.90057361 LyLangley
Megajoule per square meter quick reference
| Megajoule per square meter | Kilowatt-hour per square meter | Kilojoule per square meter | BTU per square foot |
|---|---|---|---|
| 1 MJ/m² | ≈ 0.2777777778 kWh/m² | = 1000 kJ/m² | ≈ 88.05509184 BTU/ft² |
| 10 MJ/m² | ≈ 2.777777778 kWh/m² | = 10000 kJ/m² | ≈ 880.5509184 BTU/ft² |
| 100 MJ/m² | ≈ 27.77777778 kWh/m² | = 100000 kJ/m² | ≈ 8805.509184 BTU/ft² |
| 1000 MJ/m² | ≈ 277.7777778 kWh/m² | = 1000000 kJ/m² | ≈ 88055.09184 BTU/ft² |
Where the megajoule per square meter fits
The next smaller heat density unit is the langley (Ly). 1 MJ/m² ≈ 23.90057361 Ly, and 1 Ly = 0.04184 MJ/m².
The next larger heat density unit is the kilowatt-hour per square meter (kWh/m²). 1 MJ/m² ≈ 0.2777777778 kWh/m², and 1 kWh/m² = 3.6 MJ/m².
Frequently asked questions
- How many kilowatt-hours per square meter are in one megajoule per square meter?
- One megajoule per square meter ≈ 0.2777777778 kWh/m² (kilowatt-hours per square meter).
- How many kilojoules per square meter are in one megajoule per square meter?
- One megajoule per square meter = 1000 kJ/m² (kilojoules per square meter).
- How many BTUs per square foot are in one megajoule per square meter?
- One megajoule per square meter ≈ 88.05509184 BTU/ft² (BTUs per square foot).