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Science Tools

Ohm's Law, Half-Life, Molar Mass and Ideal Gas Law Calculators

Calculators and interactive models for science. Ohm's law and density, sound frequency and decibels, molecules and crystal lattices, pendulums and orbits. The simulations run live in the browser, so you can change a value and watch what happens.

72 tools tagged Science

3D Function Plotter

Type z = f(x, y) and orbit the surface it makes.

3D Vector Field Plotter

Type Fx, Fy, Fz and see the field as coloured arrows.

Battery Life Calculator

How long a battery lasts from capacity and load, allowing for efficiency.

Binomial Probability Calculator

Exactly, at most and at least k successes in n trials.

Bouncing Balls Screensaver

Full-screen bouncing balls with adjustable count, size, bounce and gravity.

Capacitor And Inductor Calculator

Reactance, RC and RL time constants and LC resonant frequency.

Chemical Equation Balancer

Balance any chemical equation with whole-number coefficients.

Cloth Simulation

Hang a sheet of cloth, drag it, cut it and blow it around.

Combined Gas Law Calculator

Solve P1V1/T1 = P2V2/T2 for any missing value.

Completing The Square Calculator

Vertex form, vertex and roots of any quadratic, step by step.

Confidence Interval Calculator

Confidence interval for a mean, using t or z.

Correlation Coefficient Calculator

Pearson r, Spearman rho and significance from paired data.

Crystal Lattice Viewer

Orbit unit cells of the common crystal structures, read their packing numbers.

Decibel Meter

Read live sound level in decibels from your microphone.

Density Calculator

Density, mass or volume from the other two, with a common materials table.

Determinant And Inverse Matrix Calculator

Determinant and inverse of a square matrix, as exact fractions.

Dilution Calculator

Solve C1V1 = C2V2 and get the stock-and-water recipe.

Double Pendulum

Chaotic two-rod pendulum with a traced path; angle, length and speed sliders.

Earth Day And Night Map

3D globe showing daylight and night for any date and time.

Empirical Formula Calculator

Empirical and molecular formula from percent or grams.

Energy Calculator

Kinetic, potential, electrical and mass energy in joules and kWh.

Exponent Calculator

Raise a number to any power, with exact results for big powers.

Exponential Growth And Decay Calculator

Final amount, doubling time or half-life for steady percentage growth or decay.

Falling Sand

Paint sand, water and walls and watch them settle; fullscreen.

Five Number Summary Calculator

Min, quartiles, median, max, IQR and outliers.

Floor Plan 3D Preview

List rooms as rectangles and walk around them in 3D.

Force Calculator

Force, mass or acceleration from the other two, in newtons, lbf and kgf.

Frequency To Wavelength Calculator

Convert frequency and wavelength for radio, light and sound.

Grams To Moles Converter

Grams to moles and back for any formula.

Gravity And Friction

Tilt a ramp, set friction and gravity, and see when a block slides.

Half-Life Calculator

Amount left, decay time or half-life, isotopes built in.

Ideal Gas Law Calculator

Solve PV = nRT for any one unknown, in any common unit.

Interactive Periodic Table

All 118 elements, coloured by category, block or property.

Joules To Calories

Convert joules to calories: divide by 4.184.

Keyword Density Checker

Word and phrase frequency with density percentages.

Linear Regression Calculator

Least-squares line of best fit, R² and predictions.

Log Calculator

Logarithms in base 10, e, 2 or any base, and antilogs.

Matrix Calculator

Matrix multiplication, addition and transpose with working.

Molar Mass Calculator

Molar mass of any formula, brackets and hydrates included.

Molarity Calculator

Molarity, mass to weigh and volume for any solution.

Molecule Viewer

Open a PDB or XYZ molecule in 3D, orbit it, save a PNG.

Newton's Cradle Simulator

Lift one or more balls of a Newton's cradle and watch momentum pass through.

Normal Distribution Calculator

Areas under any bell curve, and values at a percentile.

Note Frequency Calculator

Note to frequency and frequency to note, with cents offset and MIDI number.

Ohm's Law Calculator

Enter any two of volts, amps, ohms and watts to get the other two.

Parametric Surface Plotter

Plot x(u,v), y(u,v), z(u,v) as a 3D surface and orbit it.

Pendulum Wave

A row of pendulums drifts into waves and back into line every cycle.

Percent Composition Calculator

Mass percent of each element in any formula.

Percent Yield Calculator

Percent yield and theoretical yield from a limiting reactant.

PH Calculator

pH, pOH and ion concentrations, weak acids and bases too.

Physics Sandbox

Drop shapes, drag them around and play with gravity, bounce and friction.

Polynomial Root Calculator

Real and complex roots of any polynomial, with factorisation.

Pressure Calculator

Pressure from force and area, or force from pressure, in Pa, bar and psi.

Quadratic Equation Calculator

Solve ax² + bx + c = 0, with exact roots and the vertex.

Ragdoll Physics Game

Grab a ragdoll by any limb and throw it around a physics playground.

Reaction-Diffusion

Gray-Scott chemistry growing coral, spots and fingerprints; fullscreen.

Resistor Colour Code Calculator

Resistor value and tolerance from 4 or 5 colour bands, with the code table.

Root Calculator

Square, cube and nth roots, with the radical simplified.

Rubik's Cube Solver

3D Rubik's cube that plays moves and solves any state.

Scientific Notation Converter

Convert numbers to scientific, E and engineering notation and back.

Seeding Rate Calculator

Seed rate in kg/ha from target plants, TSW and establishment.

Significant Figures Calculator

Count significant figures and round to any number of them.

Solar System Simulator

3D planets in their real positions for any date, with orbits and time control.

Speaker Impedance Calculator

Total ohms for speakers in series, parallel or series-parallel.

Speed Of Light Calculator

How long light takes to travel a distance, or how far it goes.

Standard Deviation Calculator

Sample and population standard deviation and variance of a list.

Sun Path And Shadow Simulator

Sun arc and pole shadow for any place, date and hour.

Sunrise Sunset Calculator

Sunrise, sunset, day length and twilight for any place and date.

Transformer Calculator

Turns ratio, secondary turns and primary current from two voltages.

US Frost Dates

Last and first frost dates for 6,948 US weather stations.

Wrecking Ball Simulator

Swing a chained wrecking ball into a 3D brick building.

Z-Score Calculator

Z-score, percentile and tail areas from a value, mean and SD.