Scientific Calculator

A complete scientific calculator: graphing, solver, calculus, statistics, matrices, units, finance, chemistry, physics, biology.

A fast, powerful scientific calculator, right in your browser. fractions, graphs, equations, matrices, a periodic table, physics and biology tools, 100+ formulas and more. It works offline, is free, no ads, and keeps your data private. OPEN IT YOUR WAY • Popup: click the toolbar icon or press Alt+S. • Its own window: keep the calculator open while you work, at any size. • Advanced mode: the calculator in a big window with all the tools down its side. Graph, periodic table and every other tool can also pop out into a window of their own. • On every page (optional): a small calculator button on the side of any website. Drag it to the side you like. • Instant answers on every page (optional): see below. CALCULATOR • See the whole equation as you type, and fix any part of it with the arrow keys or a click. • Real calculator math: 1 + 2 × 3 = 7, with brackets nested up to 29 levels. • Select part of an equation and press a function key to wrap it: sin over 30 is sin(30). • Trigonometry, inverse and hyperbolic functions, in Deg, Rad or Grad. • Logarithms, powers and roots, factorial, nCr, nPr, mod, gcd, lcm and Rand. • Degrees, minutes and seconds: 12°30′15″. • Memory keys, Ans, and undo and redo with Ctrl+Z. • Number format: Fix, Sci or Eng, 0 to 9 decimal places, and thousands separators like 1,234.5 or 1.234,5. FRACTIONS • Turn on a/b and every division is drawn as a real fraction while you type. • Results show as exact fractions: 0.75 is 3/4. HISTORY AND VARIABLES • Your last 50 calculations are saved. Insert an equation or a result again, or copy it. • Export the history as text or as a CSV for a spreadsheet. • Ten variables, A to J: store a result and use it in any equation, like 2A + B. GRAPH • Draw up to seven functions at once, each in its own color. • Roots, highs and lows, and crossings are marked. Click any point for its x, y and slope, with the tangent line. • Sliders you can play, the area under a curve, derivatives, equations of x and y, inequalities, polar and parametric curves, sequences, slope fields and best-fit lines. • A table of values, sixty examples to try, and a big view. SOLVE • Every root of an equation, in exact form too: √2, (1 + √5)/2, π/6. • Inequalities, turning points, and polynomials up to the power 30, with complex roots. • Two or three linear equations at once, and where two curves meet. • Calculus: integrals, derivatives, limits, sums and products to infinity, Taylor series, arc length and differential equations. • Geometry: triangles from any three parts, areas and volumes of shapes, the circle through three points, all drawn. • Most answers come with a graph, and each card has an example to start from. PERIODIC TABLE AND CHEMISTRY • All 118 elements, coloured by kind, state, block or electronegativity, with a search. • Click an element for its mass, electron configuration, shells, melting and boiling points, density, oxidation states, hardness, magnetism, conductivity, abundance and more. • Its atom drawn as Bohr drew it, with the electrons going round. • Its spectrum, with dark absorption lines or bright emission lines. • Its crystal structure: the unit cell drawn in 3D, with its atoms counted. • Molar mass of a formula, grams ↔ moles ↔ particles, and empirical formulas. • Balance any equation, redox too, with the limiting reactant and percent yield. • Molarity, dilution, pH, buffers, solutions, solubility, and names ⇄ formulas. • Gas laws, partial pressures, gas volumes, effusion and the air with height. PHYSICS • Electronics: resistor color codes and SMD codes both ways, drawn; resistors, capacitors and coils in series and parallel (100 + 220 || 330); Ohm's law, dividers, filters, diodes, transistors, op-amps, the 555 and decibels. • Motion: steady acceleration, projectiles, orbits, pendulums and springs, rotation. • Forces: friction, pulleys, collisions, energy, torque, gravitation, Coulomb's law and magnetic fields. • Waves: standing waves, lenses and mirrors with ray diagrams, interference, the Doppler effect. • Matter: heat, gases, Carnot engines, pressure, buoyancy and flow. • Modern: relativity, nuclear binding energy, the photoelectric effect, quantum tunnelling, hydrogen's spectrum and radioactive decay. • Most results come with a drawing. BIOLOGY • Genetics: Punnett squares of up to six genes, crosses of the X, Hardy–Weinberg, gene maps and pedigrees. • DNA: sequences, translation, primers, restriction digests on a virtual gel, PCR, alignment and CRISPR guides. • Protein: mass, pI and charge, enzyme kinetics and dose–response curves. • Lab: dilutions, cell counts, growth, OD600, CFU, centrifuge settings. • Cells, health and ecology: more tools for each. FINANCE • Loan calculator with a table of every year or every payment. • Savings growth, time value of money (N, I/Y, PV, PMT, FV), NPV, IRR and payback. • APR and APY, bonds, depreciation, break-even, inflation, markup and margin. PROBABILITY AND STATISTICS • Type or paste a list of numbers, even a spreadsheet column: mean, median, standard deviation, quartiles, mode and more, with a histogram and a box plot. • Pairs of x and y: correlation and the best-fit curve (linear, quadratic, exponential, power, logarithmic or logistic). • Tests of hypotheses as on a TI-84: t, z, proportions, χ², ANOVA, with p-values. • Normal, t, χ², F, binomial, Poisson and more, with p-values and confidence intervals. FORMULAS AND CONSTANTS • 100+ formulas of algebra, geometry, physics, electricity, chemistry, money and everyday life. Fill in the letters and get the answer. • 59 constants of math and science, one click to insert. MATRICES AND NUMBERS • Matrices up to 10 × 10: determinant, inverse, eigenvalues, A x = b, LU and QR. • Vectors, and complex numbers like (2+3i)(1−i), drawn on the plane. • Prime factors, exact big numbers like 100! and 2^200, and repeating decimals as fractions. • For programmers: hex, binary and any base, bit operations, Gray code, truth tables with Karnaugh maps, Base64, hashes (MD5, SHA-256), UUIDs, IEEE 754 and IPv4 and IPv6 subnets. CONVERTER AND DATES • Units of length, area, volume, mass, temperature, speed, time, data, pressure, energy, power, angle, fuel economy, force, torque, density, frequency, voltage, resistance and more. • Days between two dates, add days, months or years to a date, and Unix timestamps. • Time zones: 9:00 in New York is 22:00 in Tokyo. INSTANT ANSWERS ON ANY WEBSITE (OPTIONAL, OFF BY DEFAULT) • A small icon appears after maths on the pages you read: a sum, an equation, a matrix, an integral, a formula, a conversion, a loan, a chemical reaction, a DNA sequence or a resistor's colours. • Hover for the answer. Click to open it in the calculator. • Select any text and choose Calculate from the right-click menu. • Turn it off on one website from the toolbar icon's menu. KEYBOARD, COPY AND PASTE • Every button has a key, on any keyboard layout, Arabic, Hebrew, Russian and Greek too. • Paste a whole equation such as 2 + 3 × sin(30). • Click any result to use it in your calculation. FOR SCHOOLS AND ORGANIZATIONS Administrators can turn features off for everyone they manage, for example during a test. Each of these can be turned off by policy in the Google Admin Console: formulas, converter, graph, solve, statistics, numbers, chemistry, physics, biology, the separate window, the button on every page, and instant answers on every page. A feature turned off disappears from the calculator right away and is locked in the options. Admin setup guide: raad.dev/calculator/admin PRIVATE AND FREE • Works offline. Nothing you type leaves your browser. • Asks for website access only if you turn on the button or the instant answers on every page. Both are off by default. • The button reads nothing from the pages. The instant answers look at the text of a page, on your device only, to find maths, and nothing is sent anywhere. • Remembers your work when you close it. • Try the web version: raad.dev/calculator • Free and open source: github.com/raad-altaie/scientific-calculator Cheers!