Heat Density Converter

Convert J/m², langley, cal/cm², BTU/ft², and more — instantly.

Free heat density converter. Convert joules per square meter to langley, calorie, and BTU-based areal energy units. Use the express converter for any unit pair, or open a quick conversion below.

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1 joule per square meter = 0.0000880551 BTU (IT) per square foot

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Joule per Square Meter → BTU (IT) per Square Foot

Joule per Square Meter to BTU (IT) per Square Foot

BTU (IT) per Square Foot → Joule per Square Meter

BTU (IT) per Square Foot to Joule per Square Meter

Langley → Joule per Square Meter

Langley to Joule per Square Meter

Joule per Square Meter → Langley

Joule per Square Meter to Langley

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Pick any unit to open a two-way conversion. IT and thermochemical BTUs are labeled separately.

From

JOULE PER SQUARE METER

1 J/m² = 0.0000880551 BTU (IT)/ft²

joule per square meter (J/m²) → btu (it) per square foot (BTU (IT)/ft²) btu (it) per square foot (BTU (IT)/ft²) → joule per square meter (J/m²)

LANGLEY

1 langley = 41,840 J/m²

langley → joule per square meter (J/m²) joule per square meter (J/m²) → langley

CALORIE (THERMOCHEMICAL) PER SQUARE CENTIMETER

1 cal (th)/cm² = 41,840 J/m²

calorie (thermochemical) per square centimeter (cal (th)/cm²) → joule per square meter (J/m²) joule per square meter (J/m²) → calorie (thermochemical) per square centimeter (cal (th)/cm²)

BTU (IT) PER SQUARE FOOT

1 BTU (IT)/ft² = 11,356.53 J/m²

btu (it) per square foot (BTU (IT)/ft²) → joule per square meter (J/m²) joule per square meter (J/m²) → btu (it) per square foot (BTU (IT)/ft²)

BTU (THERMOCHEMICAL) PER SQUARE FOOT

1 BTU (th)/ft² = 11,348.93 J/m²

btu (thermochemical) per square foot (BTU (th)/ft²) → joule per square meter (J/m²) joule per square meter (J/m²) → btu (thermochemical) per square foot (BTU (th)/ft²)