A fast, powerful scientific calculator, right in your browser. Fractions, graphs, equations, matrices, 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. • On every page (optional): a small calculator button on the side of any website. Drag it to the side you like. 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. • 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, the area under a curve, derivatives, inequalities, polar and parametric curves, sequences 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, Taylor series, arc length and differential equations. 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 line of best fit. • 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). • Prime factors, exact big numbers like 100! and 2^200, and repeating decimals as fractions. • For programmers: hex, binary and any base, bit operations, Base64, hashes (MD5, SHA-256), UUIDs and IP subnets. CONVERTER AND DATES • Units of length, area, volume, mass, temperature, speed, time, data, pressure, energy, power, angle and fuel economy. • Days between two dates, add days, months or years to a date, and Unix timestamps. KEYBOARD, COPY AND PASTE • Every button has a key, on any keyboard layout. • 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, matrices and numbers, the separate window, and the button 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 on every page, and reads nothing from the pages. • 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!