Scientific Calculator EN

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 colour 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, has…