🔥 Thermodynamics & Fluids Calculators
Heat, gases, engines, pressure, buoyancy and fluid flow. Browse 71 free thermodynamics & fluids calculators, each with the formula, a worked example and an interactive chart.
Specific Heat Capacity CalculatorCalculate heat needed to change a substance's temperature.Latent Heat CalculatorFind energy to melt or vaporise a substance.Mixing Temperature (Calorimetry) CalculatorFind the final temperature when two amounts of water mix.Temperature ConverterConvert between Celsius, Fahrenheit and Kelvin.Ideal Gas Law (PV = nRT) CalculatorFind pressure of an ideal gas from moles, temperature and volume.Combined Gas Law CalculatorFind the final pressure of a gas when volume and temperature change.Boyle's Law CalculatorCompute volume after a pressure change at constant temperature.Charles's Law CalculatorCompute gas volume after a temperature change at constant pressure.Gas Density CalculatorFind density of a gas from molar mass, pressure and temperature.Thermal Expansion CalculatorCalculate how much a solid expands when heated.Heat Conduction Rate CalculatorCalculate heat flow through a wall or plate.Radiation Power (Stefan–Boltzmann) CalculatorFind power radiated by a hot object.Carnot Efficiency CalculatorFind the maximum efficiency of a heat engine.Heat Engine Work and Heat Rejected CalculatorFind work and exhausted heat given input heat and efficiency.Heat Pump and Refrigerator COP CalculatorCompute ideal coefficient of performance for heating and cooling.Entropy Change CalculatorFind entropy change from heat transfer at a temperature.Isothermal Gas Work CalculatorWork done by an ideal gas expanding at constant temperature.Adiabatic Process CalculatorFind final temperature and pressure after adiabatic compression or expansion.First Law of Thermodynamics CalculatorFind change in internal energy from heat and work.Reynolds Number CalculatorDetermine whether pipe flow is laminar or turbulent.Bernoulli Equation CalculatorFind pressure change when fluid speed changes between two points.Continuity Equation CalculatorFind fluid speed in a pipe after a change in diameter.Hydrostatic Pressure CalculatorFind pressure at a depth in a fluid.Buoyancy and Flotation CalculatorCalculate buoyant force and whether an object floats.Volumetric Flow Rate CalculatorCompute flow rate from pipe size and fluid speed.Poiseuille Flow CalculatorFlow rate for viscous fluid through a narrow tube.Torricelli's Law CalculatorFind speed of water leaving a hole in a tank.Hydraulic Press CalculatorFind output force of a hydraulic lift.Dew Point CalculatorEstimate dew point from air temperature and humidity.Heat Index CalculatorEstimate the apparent temperature from heat and humidity.Wind Chill CalculatorFind how cold the wind makes the air feel.Time to Boil Water CalculatorEstimate time for a heater to bring water to a boil.Thermal Resistance (R-Value) CalculatorCombine layers to find total R-value and U-value.Specific Gravity CalculatorFind specific gravity of a substance relative to water.Gas Kinetic Speed CalculatorFind RMS speed of gas molecules.Gay-Lussac Pressure-Temperature Law CalculatorFind the new pressure of a fixed volume of gas when its temperature changes.Specific Heat Energy CalculatorFind the heat energy needed to change the temperature of a mass of material.Vapor Pressure at Another Temperature CalculatorEstimate a liquid vapor pressure at a new temperature from its enthalpy of vaporization.Thermal Diffusivity CalculatorFind how quickly temperature spreads through a material from its conductivity, density and specific heat.Convective Heat Transfer CalculatorFind the heat carried away by a fluid flowing over a surface at a temperature difference.Heat Exchanger LMTD CalculatorFind the log mean temperature difference and heat duty of a heat exchanger.Otto Cycle Efficiency CalculatorFind the ideal efficiency of a petrol engine from its compression ratio.Mean Free Path of a Gas CalculatorFind the average distance a gas molecule travels between collisions.Capillary Rise CalculatorFind how high a liquid climbs inside a narrow tube from surface tension and contact angle.Droplet Laplace Pressure CalculatorFind the extra pressure inside a small liquid droplet from its surface tension and radius.Particle Settling Velocity CalculatorFind how fast a small sphere settles through a fluid using Stokes law.Pipe Friction Head Loss CalculatorFind the energy lost to friction in a pipe using the Darcy-Weisbach equation.Pump Power CalculatorFind the hydraulic and shaft power needed by a pump to lift water at a given flow and head.Orifice Discharge Flow CalculatorFind the flow rate through a small hole in a tank from the water head above it.Water Hammer Pressure CalculatorEstimate the pressure spike in a pipe when a valve closes suddenly (Joukowsky equation).Saturation Vapor Pressure CalculatorFind the maximum water vapor pressure air can hold at a given temperature.Growing Degree Days CalculatorFind the daily heat units a crop accumulates above a base temperature.Thermal Stress CalculatorFind the stress built up in a constrained material when its temperature changes.Gas Heat Capacity Ratio CalculatorFind the heat capacity ratio and molar heat capacities of an ideal gas from its degrees of freedom.Hot Water Tank Heating Energy CalculatorEstimate the energy to heat a tank of water by a given temperature rise.Diesel Cycle Efficiency CalculatorFind the ideal efficiency of a diesel engine from its compression and cut-off ratios.Window Heat Loss CalculatorEstimate heat lost through a window and the energy lost in a day.Insulation R-value to U-value CalculatorConvert an insulation R-value into a U-value and find the heat loss through a wall.Polytropic Compression Work CalculatorFind the final pressure and work done when a gas is compressed along a polytropic process.Lumped Heating and Cooling Time Constant CalculatorFind the thermal time constant of a small object heating or cooling in a fluid.Newton Cooling Temperature CalculatorFind the temperature of an object cooling in surroundings at a steady temperature.Constant Pressure Heat Transfer CalculatorFind the heat added to an ideal gas heated at constant pressure.Entropy of Mixing CalculatorFind the entropy increase when two ideal gases or liquids mix.Refrigerant Mass Flow CalculatorFind the refrigerant flow needed for a cooling load from the enthalpy change across the evaporator.Fan Power CalculatorFind the air power and shaft power needed by a fan moving a flow against a pressure rise.Thermocouple Voltage CalculatorEstimate the voltage a thermocouple produces for a given temperature difference.Vapor Pressure Deficit CalculatorFind how far air is from saturation, which drives plant water loss and drying.Fluid Heat Duty CalculatorFind the heat carried by a flowing fluid as it is heated by a given temperature rise.Air Changes per Hour CalculatorFind how many times per hour a room air volume is replaced by ventilation.Required Ventilation Flow CalculatorFind the fresh air supply needed for a number of occupants at a set rate per person.Absolute Humidity CalculatorFind the mass of water vapor per cubic metre of air from temperature and relative humidity.
About Thermodynamics & Fluids calculators
Heat, gases, engines, pressure, buoyancy and fluid flow. CalcDepo has 71 free thermodynamics & fluids calculators. Each one shows the formula, the variables and their units, a worked example and a chart of how the result changes, so you can check homework, plan a lab or understand the idea behind the numbers.
Popular calculators here include Specific Heat Capacity, Latent Heat, Mixing Temperature, Temperature, Ideal Gas Law, Combined Gas Law. Common searches in this category include “how much energy to heat water”, “energy to boil water”, “mix hot and cold water”, “celsius to fahrenheit”.
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