Science Calculators
55 free calculatorsScientific calculations sit behind engineering decisions, research analysis, and student coursework. These tools make the formulas accessible — showing inputs, outputs, and the derivation connecting them.
Each calculator cites its source formula and explains the units and edge cases that matter in practice.
3 Phase Motor Amperage Calculator
Calculate 3 phase motor amperage from power, voltage, and efficiency. Get precise current draw for electrical design and motor selection.
Acceleration Calculator
Calculate acceleration from velocity change and time, or find velocity and time from acceleration values. Enter initial velocity, final velocity, and time to...
Activation Energy Calculator
Calculate activation energy from reaction rate constants at different temperatures. Enter rate constants and temperatures to find the energy barrier for chem...
Bending Stress Calculator
Calculate bending stress in beams and structural members. Enter load, beam dimensions, and material properties to determine maximum stress values.
Bolt Torque Calculator
Calculate required bolt torque based on bolt size, grade, and lubrication. Get precise torque specifications for safe fastening in engineering applications.
Boyles Law Calculator
Calculate pressure and volume relationships using Boyle's Law. Enter initial conditions and one final value to find the unknown variable in gas compression.
Buffer Solution Calculator
Calculate buffer solution pH using Henderson-Hasselbalch equation. Enter acid/base concentrations and pKa to find exact pH for your chemistry lab or research.
Capacitor Charge Time Calculator
Calculate how long it takes for a capacitor to charge to any voltage level. Enter capacitance, resistance, and target voltage to get precise charge times.
Capacitor Energy Calculator
Calculate the energy stored in a capacitor using capacitance and voltage. Enter your values to see stored energy in joules instantly.
Charles Law Calculator
Calculate gas volume or temperature changes using Charles Law. Enter initial values and one final value to find the unknown property.
Decibel Calculator
Calculate sound intensity in decibels from power or intensity values. Convert between dB, power ratios, and intensity levels for audio engineering.
Density Calculator
Calculate density using mass and volume with our free density calculator. Get instant results for materials, liquids, and solids with step-by-step examples.
Doppler Effect Calculator
Calculate the frequency shift when sound waves move between observer and source. Enter wave frequency, source speed, and observer speed to see the Doppler ef...
Electric Field Calculator
Calculate electric field strength from charge and distance. Enter point charge and position to get field intensity in N/C instantly.
Electromagnetic Spectrum Calculator
Calculate frequency, wavelength, and energy for any electromagnetic radiation. Enter any one value to find the other two across the entire spectrum.
Engineering Calculation Software
Calculate beam deflection, stress analysis, and load capacity for structural engineering projects. Get precise engineering calculations with safety factors a...
Engineering Tool
Calculate engineering parameters for design projects. Get precise measurements for structural, mechanical, and electrical engineering applications.
Entropy Calculator
Calculate thermodynamic entropy changes using temperature and heat values. Enter initial and final temperatures with heat absorbed to see entropy change in J/K.
Entropy Change Calculator
Calculate entropy change in thermodynamic processes. Enter initial and final temperatures, heat capacity, or use the Boltzmann formula for molecular systems.
Escape Velocity Calculator
Calculate the minimum velocity needed to escape any celestial body's gravitational pull. Enter mass and radius to find escape velocity in km/s.
Focal Length Calculator
Calculate lens focal length using object distance and image distance. Essential for optics, photography, and physics applications.
Force Calculator
Calculate force using Newton's second law with our free force calculator. Enter mass and acceleration to find force in Newtons instantly.
Frequency Calculator
Calculate wave frequency from wavelength and wave speed. Enter wavelength in meters and speed in m/s to get frequency in Hz instantly.
Gas Law Calculator
Calculate any gas property using the ideal gas law. Enter pressure, volume, temperature, and moles to find the missing variable in PV=nRT equations.
Gibbs Free Energy Calculator
Calculate Gibbs free energy to predict if chemical reactions occur spontaneously. Enter enthalpy, entropy, and temperature to see the energy change.
Gravitational Force Calculator
Calculate gravitational force between two objects. Enter masses and distance to find the attractive force in Newtons using Newton's law of universal gravitat...
Gravitational Potential Energy Calculator
Calculate gravitational potential energy from mass, height, and gravity. Enter your values to see the stored energy in joules and understand energy fundament...
Half-Life Calculator
Calculate radioactive decay half-life, remaining quantity, and elapsed time. Free online half-life calculator with step-by-step explanations.
Hydraulic Retention Time Calculator
Calculate hydraulic retention time (HRT) for wastewater treatment systems. Enter reactor volume and flow rate to determine water residence time in hours or d...
Ideal Gas Law Calculator
Calculate pressure, volume, temperature, or moles of gas using the ideal gas law PV=nRT. Enter three known values to find the fourth.
Kinetic Energy Calculator
Calculate kinetic energy instantly with our free online calculator. Enter mass and velocity to find KE using the formula ½mv². Perfect for physics students a...
LED Lighting Savings Calculator
Calculate energy savings and cost reduction from switching to LED bulbs. Compare electricity costs, lifespan, and total savings over time.
Molar Mass Calculator
Calculate the molar mass of any chemical compound. Enter your chemical formula and get the molecular weight in grams per mole instantly.
Molarity Calculator
Calculate solution molarity from solute mass and volume. Enter grams, molecular weight, and solution volume to get molar concentration instantly.
Momentum Calculator
Calculate momentum by entering mass and velocity. Get instant results with momentum formulas and physics calculations for any moving object.
Nuclear Binding Energy Calculator
Calculate nuclear binding energy from atomic mass, protons, and neutrons. Find how much energy holds the nucleus together using Einstein's mass-energy equiva...
Orbital Period Calculator
Calculate how long it takes any object to orbit around another body. Enter orbital radius or altitude - get orbital period in days, hours, or years for satel...
Parallel Resistor Calculator
Calculate total resistance of resistors in parallel circuits. Enter individual resistor values to get equivalent parallel resistance instantly.
pH Calculator
Calculate pH from hydrogen ion concentration or convert pH to pOH instantly. Easy-to-use pH calculator for chemistry students and professionals.
Pipe Flow Calculator
Calculate pipe flow rate, velocity, and pressure drop using the Hazen-Williams equation. Free engineering calculator for water pipe sizing.
Pipe Volume Calculator
Calculate pipe volume in gallons or litres with our free pipe volume calculator. Enter pipe diameter and length to get instant results for plumbing and engin...
Pipe Weight Calculator
Calculate pipe weight for steel, aluminum, and PVC pipes. Enter outer diameter, wall thickness, and length to get accurate weight in kg or lbs.
Potential Energy Calculator
Calculate gravitational potential energy with mass, height, and gravity. Free online physics calculator with step-by-step examples and formulas.
Pressure Calculator
Calculate pressure using force and area. Enter force in Newtons and area in square meters to get pressure in Pascals. Includes common pressure unit conversions.
Projectile Motion Calculator
Calculate projectile motion with initial velocity, angle, and height. Get range, maximum height, flight time, and trajectory instantly.
Redshift Calculator
Calculate redshift and recession velocity of distant galaxies. Enter observed wavelength and rest wavelength to determine how fast objects are moving away fr...
Reynolds Number Calculator
Calculate the Reynolds number for any fluid flow. Enter velocity, pipe diameter, and fluid properties to determine if flow is laminar or turbulent.
Snells Law Calculator
Calculate angle of refraction using Snell's law. Enter incident angle and refractive indices to find how light bends when crossing material boundaries.
Speed Distance Time Calculator
Free speed distance time calculator. Solve for speed, distance, or time using any two known values. Supports mph, km/h, m/s, miles, km, and more.
Stress Concentration Factor Calculator
Calculate stress concentration factor (Kt) for various geometric features in mechanical engineering. Essential for failure analysis and design optimization.
Titration Calculator
Calculate molarity, volume, or concentration in acid-base titrations. Enter known values to find the unknown quantity using the titration equation.
Wave Frequency Calculator
Calculate wave frequency from wavelength and wave speed. Free physics calculator for electromagnetic waves, sound waves, and mechanical vibrations.
Wave Speed Calculator
Calculate wave speed using frequency and wavelength. Physics wave calculator for sound waves, electromagnetic waves, and mechanical waves in any medium.
Wavelength Calculator
Calculate wavelength from frequency and wave speed. Enter frequency in Hz and wave speed in m/s to find the wavelength of any wave type.
Wavelength Frequency Calculator
Calculate wave frequency from wavelength and speed, or find wavelength from frequency. Enter any two values to solve for the third using the wave equation.