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Enthalpy Calculator
Enthalpy change of a reaction from enthalpies of formation (Hess's law), or ΔH = ΔU + pΔV at constant pressure.
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Free science calculators for everyday questions, from quick checks to detailed breakdowns.
Science tools (89)
- Tested
Escape Velocity Calculator
Speed needed to escape a body's gravity from its surface.
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Flow Rate Calculator
Volumetric flow rate from area and velocity, or volume and time.
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Force Calculator
Force from mass and acceleration (Newton's second law).
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Free Fall Calculator
Fall time, height and impact speed in free fall from rest.
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Friction Force Calculator
Friction force from the coefficient of friction and the normal force.
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Fuel Emissions Calculator
CO₂ from burning gasoline or diesel.
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Gravitational Force Calculator
Newtonian gravitational attraction between two masses.
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Greenhouse Gas Conversion Calculator
Convert methane or nitrous oxide to CO₂ equivalent (100-year GWP).
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Half-Life Calculator
Remaining amount, elapsed time or half-life from exponential decay.
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Heat Index Calculator
Apparent temperature from air temperature and relative humidity (°F).
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Heat Pump COP Calculator
Coefficient of performance from heat output and power input, or the Carnot limit.
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All science calculators by topic (89)
Astronomy
Atmosphere
Atomic Physics
Chemistry
Dynamics
Emissions
Energy
Environment
Fluids
Kinematics
Mechanics
Medical
Nuclear
Physics
Relativity
Thermal
Thermodynamics
About science calculators
Science Calculators help you turn a question into a clear, checkable answer. Each tool lists its inputs, shows the formula it relies on and explains how to read the result.
Browse by topic using the filters, or search for a specific tool. Tools that are still being built are clearly marked as previews and are not presented as finished calculators.
Frequently asked questions
Are the science calculators calculators free?
Yes. Every calculator on Calculator Atlas is free to use and requires no sign-up.
How are results verified?
A calculator is only published after its formula has been implemented, tested against reference values and reviewed. Pages still in development are labeled as previews.