Explore free thermodynamics calculators for heat, energy, phase change, combustion, reaction chemistry, radiation, optics, braking heat, oxygen tank duration, and applied engineering problems.
These tools are designed for students, engineers, science learners, and technical users who want clear formulas, step-by-step results, and practical explanations.
Use these tools for core thermodynamics problems involving heat engines, temperature change, latent heat, phase transitions, calorimetry, and combustion temperature.
Calculate ideal heat engine efficiency, maximum work, heat rejected, and Carnot limits from hot and cold reservoir temperatures.
Estimate heat required for melting, freezing, vaporization, condensation, or sublimation using mass and latent heat.
Calculate heat needed to change a substance from solid to liquid, with optional preheating before melting.
Calculate heat, mass, specific heat, or temperature change using the relation Q = mcΔT.
Estimate flame temperature for a CO and N₂ gas mixture with excess air using a simplified constant heat-capacity model.
Estimate energy released or absorbed in a calorimeter experiment from heat capacity and temperature change.
These calculators help with stoichiometry, reaction rates, bond energy estimates, limiting reactants, electrolysis, and diffusion.
Identify the limiting reactant, excess reactant remaining, and theoretical product yield for preset balanced reactions.
Use Faraday’s law to calculate deposited mass, required current, required time, or plating thickness.
Estimate reaction enthalpy from average bond energies by comparing bonds broken and bonds formed.
Calculate reaction rates using rate laws, concentrations, rate constants, and reaction orders.
Estimate diffusion rate for gases or solutes using concentration difference, area, distance, and diffusion coefficient.
Use these tools for light pressure, Fresnel reflectivity, ionization energy, nuclear binding energy, and radioactive decay estimates.
Calculate s-polarized, p-polarized, and average reflectance at an interface between two transparent media.
Estimate pressure exerted by light on absorbing or reflecting surfaces using optical intensity.
Compute the energy required to remove an electron from an atom using simplified atomic energy relationships.
Estimate nuclear binding energy from mass defect, protons, neutrons, and atomic mass values.
Calculate remaining amount, elapsed time, or half-life for exponential radioactive decay problems.
These tools connect thermodynamics to real engineering situations such as braking heat, oxygen cylinder duration, chimney draft, and combustion-related estimates.
Estimate braking heat, kinetic energy loss, braking power, deceleration, braking force, stopping distance, and temperature rise.
Estimate oxygen cylinder duration from pressure, reserve pressure, cylinder factor or water capacity, and oxygen flow rate.
Estimate above-roof chimney height using the 3-2-10 clearance rule and optional stack-effect draft pressure.
These calculators are useful for laboratory math, molecular preparation, and nuclear/atomic educational problems.
Calculate resuspension volume for DNA or RNA oligos from amount, molecular weight, and target concentration.
Work through radioactive decay calculations with step-by-step exponential decay formulas.
Estimate nuclear binding energy and mass defect for isotope and nuclear physics learning problems.
Use the calculators to check homework-style problems, learn formulas, compare units, and understand the steps behind thermodynamic calculations.
Use the tools as quick estimation helpers for energy balances, heat calculations, combustion approximations, braking heat, and applied engineering checks.
Each calculator page includes formula explanations and example results, making it easier to document assumptions and explain calculations.
Thermodynamics is the study of heat, work, energy, temperature, and how energy changes form in physical and chemical systems.
For basic heat problems, start with the Temperature Change Calculator or Phase Change Calculator. For heat engines, use the Carnot Cycle Calculator. For chemistry problems, start with Limiting Reactant, Reaction Rate, Bond Energy, or Electrolysis.
Some calculators use exact formulas for idealized conditions, while others use engineering estimates. Always read each calculator’s assumptions and warnings before using the result.
No. Safety-critical work requires verified standards, qualified professionals, manufacturer data, local code, measurements, and proper testing.
Many of the calculators include step-by-step calculations, formulas, and example values so users can understand how the result is produced.