Heat Loss
Calculate Heat Loss instantly with the exact formula and a worked example. Free online calculator — no signup, works on mobile.
Heat Loss
Area, m²
ΔT, °C
U-value, W/(m²·K)
Heat loss
2,000W
More about: Heat Loss
What it calculates
The “Heat Loss” calculator computes Heat loss in W from 3 parameters: area, m², δt, °c, u-value, w/(m²·k).
Used in design, material estimation, and structural calculations.
Example calculation
With parameters Area, m² = 100, ΔT, °C = 40, U-value, W/(m²·K) = 0.5 the result is 2,000 W.
How to use
- Enter the parameter values — every field above is adjustable with a slider.
- The result and related metrics are calculated automatically as you type.
- Use the additional metrics shown (if any) where needed.
- Copy the result or bookmark the page.