Science
Unit conversion, physics formulas, chemistry tools, and constants.
31 calculators in Science
Conversion
Energy Converter
Convert between joules, calories, kWh, and other energy units.
Length Converter
Convert between meters, feet, inches, miles, and more.
Paper Weight Converter
Convert between GSM (g/m²) and US paper basis weight systems: Bond, Text, Cover, and Index.
Parsec to Light Year Converter
Convert between parsecs, light-years, and astronomical units with distance visualization.
Power Converter
Convert between watts, horsepower, and other power units.
Pressure Converter
Convert between Pa, kPa, MPa, bar, mbar, atm, psi, mmHg, inHg, and cmH₂O instantly.
Torque Converter
Convert between N·m, ft·lb, in·lb, kg·cm, and kg·m.
Unit Converter
Convert between length, weight, temperature, and volume units instantly.
Chemistry
Dilution Calculator
Calculate dilution ratios using C1V1=C2V2.
Entropy Change Calculator
Calculate entropy change (ΔS) for reversible heat transfer or temperature-change processes using thermodynamic formulas.
Gibbs Free Energy Calculator
Calculate Gibbs free energy change (ΔG) and determine whether a reaction is spontaneous.
Ideal Gas Law Calculator
Calculate pressure, volume, temperature, or moles using PV=nRT.
Molar Mass Calculator
Calculate molar mass from chemical formula.
Molarity Calculator
Calculate solution molarity from solute mass and volume.
pH Level Calculator
Calculate pH, pOH, and ion concentrations for chemistry.
Physics
Coulomb's Law Calculator
Calculate electrostatic force between charged particles.
Decibel Calculator
Calculate and compare sound levels in decibels.
Density Calculator
Calculate density, mass, or volume from two known values.
Escape Velocity Calculator
Calculate the escape velocity from any celestial body using mass and radius.
Force Calculator
Calculate force, mass, or acceleration (F=ma).
Frequency Calculator
Calculate frequency, wavelength, and period.
Half-Life Calculator
Calculate radioactive decay and remaining substance.
Kinetic Energy Calculator
Calculate kinetic energy, mass, or velocity using KE = ½mv².
Momentum Calculator
Calculate momentum from mass and velocity.
Ohm's Law Calculator
Calculate voltage, current, or resistance.
Orbital Velocity Calculator
Calculate orbital velocity, period, and circumference using v = √(GM/r). Supports Earth, Moon, Mars, Jupiter, Sun, and custom bodies.
Reverberation Time Calculator
Calculate room reverberation time (RT60) using Sabine's formula based on room dimensions and surface materials.
Specific Heat Calculator
Calculate heat energy transfer using Q = mcΔT for any mass, specific heat capacity, and temperature change.
Telescope Magnification Calculator
Calculate telescope magnification, exit pupil, true field of view, and useful magnification limits from focal lengths and aperture.
Time Dilation Calculator
Calculate relativistic time dilation using Einstein's special relativity.
Voltage Drop Calculator
Calculate voltage drop across electrical wiring using wire gauge, length, current, and conductor material.