Water Temperature Equilibrium Calculator

Calculates theoretical and exact fluid mixture temperatures based on first-law thermal conservation and temperature-dependent water density.

Total: 100% Shares auto-balance as you adjust.
Ideal / Linear Average
-- °F
Direct volumetric arithmetic average: Σ(pi · Ti) / Σpi.
Density-Adjusted Exact Temp
-- °F
Mass-corrected thermodynamic equilibrium accounting for water density curve ρ(T).
Thermal Variance (Δ = Exact − Ideal): 0.00°F Cold water is denser and carries slightly more mass per volume.
32°F (Freezing) Final Mix: 75.0°F 212°F (Boiling)
Stream Composition & Thermal Shares
Stream Portion (%) Temperature Est. Density Mass Share