Science Calculators
Browse our comprehensive collection of science calculators for physics, chemistry, astronomy, biology, earth science, and more. Free online tools for students, researchers, and science enthusiasts.
Kinetic Energy Calculator
Calculate kinetic energy (KE = ½mv²) from mass and velocity with step-by-step formula.
physicsForce Calculator
Calculate force (F = ma) from mass and acceleration using Newton's second law.
physicsVelocity Calculator
Calculate velocity, distance, or time using kinematic equations with step-by-step solutions.
physicsGravitational Force Calculator
Calculate gravitational force between two masses using Newton's law of gravitation.
physicsWork Calculator
Calculate work (W = F × d × cos θ) from force, displacement, and angle.
physicsPower Calculator
Calculate mechanical or electrical power (P = W/t) with step-by-step formula.
physicsMomentum Calculator
Calculate momentum (p = mv) and impulse from mass and velocity.
physicsProjectile Motion Calculator
Calculate range, height, and time of flight for projectile motion with angle and velocity.
physicsMolar Mass Calculator
Calculate molecular weight of chemical compounds from formula with element lookup.
chemistryStoichiometry Calculator
Balance chemical equations and calculate reactant/product quantities with mole ratios.
chemistrypH Calculator
Calculate pH, pOH, [H⁺], and [OH⁻] concentrations with step-by-step acid-base calculations.
chemistryDilution Calculator
Calculate dilution volumes (C₁V₁ = C₂V₂) for concentrated solutions.
chemistryPercent Yield Calculator
Calculate percent yield, theoretical yield, and actual yield from chemical reactions.
chemistryGrams to Moles Converter
Convert between grams, moles, and number of molecules for any substance.
chemistryGas Law Calculator (PV=nRT)
Calculate pressure, volume, temperature, or moles using the ideal gas law.
chemistryConcentration Calculator
Calculate molarity, molality, mass percent, and mole fraction for solutions.
chemistryPlanetary Weight Calculator
Calculate your weight on different planets and moons based on gravity.
astronomyLight Year Converter
Convert light years to kilometers, miles, astronomical units (AU), and parsecs.
astronomyEscape Velocity Calculator
Calculate escape velocity from planets and other celestial bodies.
astronomyOrbital Period Calculator
Calculate orbital period using Kepler's third law for planets and satellites.
astronomyStar Distance Calculator
Estimate star distance using parallax or apparent magnitude method.
astronomySolar System Model Calculator
Scale planets and distances for solar system models and diagrams.
astronomyExoplanet Transit Calculator
Calculate exoplanet transit duration and depth from orbital parameters.
astronomyHubble's Law Calculator
Calculate galaxy distance or recession velocity using Hubble's law.
astronomyDNA/RNA Primer Calculator
Calculate primer melting temperature (Tm), GC content, and primer length for PCR.
biologyGenetic Cross Calculator
Calculate Punnett square ratios and genotypic/phenotypic probabilities for crosses.
biologyProtein Molecular Weight
Calculate molecular weight of proteins from amino acid sequence.
biologyCell Division Rate Calculator
Calculate cell doubling time and growth rate for bacterial and cell cultures.
biologyMetabolic Rate Calculator (BMR)
Calculate basal metabolic rate for humans based on age, weight, height, and gender.
biologyHardy-Weinberg Equilibrium
Calculate allele and genotype frequencies using the Hardy-Weinberg principle.
biologyCFU Calculator
Calculate colony forming units (CFU/mL) from serial dilution plating.
biologyBioinformatics Sequence Counter
Count nucleotides, GC content, and calculate sequence statistics for DNA/RNA.
biologyEarthquake Magnitude Calculator
Convert between Richter magnitude, moment magnitude, and energy release.
earthWeather Temperature Converter
Convert temperature between Celsius, Fahrenheit, Kelvin, and Rankine for meteorology.
earthRock Density Calculator
Calculate density, volume, or mass of rocks and minerals from sample data.
earthOcean Tide Calculator
Estimate tide heights and times based on lunar phase and location.
earthAtmospheric Pressure Calculator
Calculate atmospheric pressure at different altitudes using barometric formula.
earthSoil Erosion Estimator
Estimate soil erosion rates using the Universal Soil Loss Equation (USLE).
earthWind Chill Calculator
Calculate wind chill temperature and frostbite risk from wind speed and air temperature.
earthHeat Index Calculator
Calculate apparent temperature from temperature and humidity (heat index).
earthScientific Notation Converter
Convert numbers between standard and scientific notation with step-by-step.
generalUnit Conversion for Science
Convert between common scientific units (SI, cgs, imperial) with precision.
generalSignificant Figures Calculator
Round numbers to correct significant figures and perform operations with sig figs.
generalUncertainty Calculator
Calculate absolute and relative uncertainty for measurements and derived quantities.
generalDensity Calculator
Calculate density, mass, or volume using the density formula (ρ = m/V).
generalVelocity Conversion
Convert between m/s, km/h, mph, ft/s, knots, and Mach number.
generalPressure Unit Converter
Convert between Pa, kPa, MPa, bar, atm, PSI, mmHg, and torr.
generalEnergy Unit Converter
Convert between J, kJ, cal, kcal, eV, kWh, BTU, and ft·lb.
generalWhat Are Science Calculators?
Our Science Calculators collection provides essential tools for students, researchers, teachers, and science enthusiasts across multiple scientific disciplines. Whether you're solving physics problems, balancing chemistry equations, exploring astronomy concepts, or analyzing biological data, these calculators deliver accurate results with clear, step-by-step explanations.
From kinetic energy and molar mass to planetary weight and DNA primer calculations, our tools cover the full spectrum of scientific computation.
How to Use This Directory
- Search: Type a keyword into the search bar to find specific calculators by name or description.
- Filter by Category: Use the dropdown to narrow down to a specific science discipline — each option shows the number of calculators available.
- Click to Use: Each card links directly to the tool. Click on any card to start your scientific calculation instantly.
- Explore Category Pages: Use the "Explore All Science Calculator Categories" section to access dedicated pages with even more tools.
Why Use Our Science Calculators?
- Comprehensive Coverage: Covers physics, chemistry, astronomy, biology, earth science, and general scientific calculations.
- Accurate & Reliable: Uses proven scientific formulas and constants with precision.
- Free & Accessible: No registration, no fees — use any tool instantly on any device.
- Educational: Many tools show formula steps and explain the underlying scientific principles.
- Professional & Student-Friendly: Designed for researchers, teachers, and students at all levels.
❓ Science Calculators FAQ
What types of scientific calculations can I perform?
You can perform physics calculations (kinetic energy, force, velocity, gravity), chemistry calculations (molar mass, stoichiometry, pH, dilutions), astronomy calculations (planetary weight, light years, orbital periods), biology calculations (DNA primers, genetics, protein MW), earth science calculations (earthquake magnitude, atmospheric pressure, wind chill), and general scientific conversions.
How do I calculate molar mass of a compound?
Use our Molar Mass Calculator. Enter the chemical formula, and the calculator will sum the atomic masses of all elements in the compound, showing the molecular weight in g/mol.
How do I calculate kinetic energy?
Use our Kinetic Energy Calculator. Enter the mass and velocity of an object, and the calculator will compute kinetic energy using KE = ½mv² with step-by-step work shown.
How do I calculate my weight on another planet?
Use our Planetary Weight Calculator. Enter your weight on Earth, and the calculator will show what you would weigh on each planet based on their relative gravity.
How do I calculate pH from concentration?
Use our pH Calculator. Enter the hydrogen ion concentration [H⁺] in mol/L, and the calculator will compute pH, pOH, and related values.
What is the ideal gas law and how do I use it?
The ideal gas law (PV = nRT) relates pressure, volume, temperature, and moles of a gas. Use our Gas Law Calculator to solve for any variable when the others are known.
How do I calculate primer melting temperature (Tm)?
Use our DNA/RNA Primer Calculator. Enter your primer sequence, and the tool will calculate Tm using the Wallace rule or nearest-neighbor method, plus GC content.
What is the difference between mass and weight in physics?
Mass is the amount of matter in an object and is constant everywhere. Weight is the force exerted by gravity on that mass (W = mg) and varies by location. Our calculators distinguish between these concepts.
Are these calculators suitable for academic research?
Yes, our calculators use established scientific formulas and constants, making them suitable for academic work, homework, and preliminary research calculations.
How often are new science calculators added?
We regularly add new calculators based on user requests and curriculum needs. If you have a suggestion, please contact us.