Heat Density Converter
Enter a value below to convert between metric, imperial, and standard heat density units.
Convert Heat Density
Enter a value and select the units to convert between joules per square meter, kilojoules per square meter, and megajoules per square meter.
You can change the units using the dropdowns above or click on a unit button.
Common Heat Density Reference Points
Here are some common heat density values in Joule per Square Meter (J/m²), Kilojoule per Square Meter (kJ/m²), and Megajoule per Square Meter (MJ/m²). Click any preset value or arrow to load it into the converter.
| Description | Joule per Square Meter (J/m²) | Kilojoule per Square Meter (kJ/m²) | Megajoule per Square Meter (MJ/m²) |
|---|---|---|---|
| 1 joule per square meter unit | 1 | 0.001 | 0.000001 |
| 5 joules per square meter | 5 | 0.005 | 0.000005 |
| 10 joules per square meter benchmark | 10 | 0.01 | 0.00001 |
| 25 joules per square meter | 25 | 0.025 | 0.000025 |
| 50 joules per square meter | 50 | 0.05 | 0.00005 |
| 100 joules per square meter reference | 100 | 0.1 | 0.0001 |
Heat Density Conversion Formulas
Use the following formulas to convert between joules per square meter, kilojoules per square meter, and megajoules per square meter.
All heat density conversions are anchored to the international SI base unit (Joule per Square Meter) for full scientific and engineering accuracy.
More Joule per Square Meter & Kilojoule per Square Meter Conversions
Convert from Joules per Square Meter
Convert to Kilojoules per Square Meter
Frequently Asked Questions
All Heat Density Conversion Calculators (6)
Select any dedicated heat density pair below for worked examples and printable tables
Category Conversion Matrix
Simultaneous comparison of 5 units in this category
Heat Density Unit Definitions & Symbols
Joule per Square Meter (J/m²)
SISI unit of areal heat density and radiant exposure.
Kilojoule per Square Meter (kJ/m²)
METRICEqual to 1,000 J/m².
Megajoule per Square Meter (MJ/m²)
METRICSolar radiation daily exposure unit (10⁶ J/m²).
Langley (cal/cm²) (Ly)
METRICSolar insolation unit equal to 1 thermochemical calorie/cm² (41,840 J/m²).
BTU per Square Foot (BTU/ft²)
US CUSTOMARYUS thermal exposure unit (≈ 11,356.5 J/m²).
References
- [1]NIST HB 133 StandardNIST (NIST HB 133 / SP 811)·Checking the Net Contents of Packaged Goods, Handbook 133 - 2019 Edition & NIST SP 811
- [2]BIPM SI BrochureBIPM (BIPM SI-9)·The International System of Units (SI Brochure, 9th Edition)
- [3]NIST SP 811 Appendix B.9NIST SP 811 (NIST SP 811 App. B.9)·NIST Guide to the SI, Appendix B.9: Factors for Units Listed by Kind of Quantity or Field of Science