Universal Calculator

Over 1 billion units sold worldwide. Two-line Natural V.P.A.M. textbook display, multi-replay directional D-pad, exact fraction calculations (a b/c ↔ d/c), SHIFT/ALPHA layers, table generator, and equation solver.

The ubiquitous blue/black scientific calculator required across US high schools, GED, ACT, and SAT tests. 2-line scrollable entry display, PRB combinatorics menu (nPr, nCr, rand), fraction conversion, and degree/radian angular modes.

Designed by Dieter Rams and Dietrich Lubs in 1977, famously paid homage to by Steve Jobs and Jony Ive in the original iPhone calculator. Convex round buttons, dark brown/black casing, amber equals key, and smooth minimalist arithmetic.

Direct Algebraic Logic (D.A.L.) and WriteView 4-line dot matrix display. Top seller across the UK, Canada, Australia, and Europe. Natural textbook fractions, statistics list editor, and rapid metric conversions.

The classic 8-function color graphing calculator: Cartesian Y₁, Polar r(θ), Parametric X/Y, interactive Table view with ΔTbl, Trace cursor, and full Calc tools (Zeros, Min, Max, Intersect, dy/dx, ∫f(x)dx).

Symbolic Computer Algebra System: exact symbolic differentiation (d/dx), indefinite & definite integration (∫), polynomial factoring, algebraic expansion, exact radical simplification, and equation solving.

Interactive 3D wireframe & shaded surface plotter z = f(x, y) with touch orbit rotation, elevation colormap, and dedicated Conic Sections explorer (Circle, Parabola, Ellipse, Hyperbola with foci and directrix).

Advanced 2D graphing engine capable of plotting implicit curves F(x, y) = 0 (Folium of Descartes, circles, lemniscates) via marching zero-crossings, plus simultaneous 2D inequality region shading.

Engineering graphing calculator featuring first-order differential equation slope fields dy/dx = f(x, y), vector direction ticks, and 4th-order Runge-Kutta (RK4) interactive trajectory simulation.

Modern interactive canvas with dynamic animated parameter sliders (a, b, c, d) and statistical scatter plot data curve fitting (Linear, Quadratic, Exponential, Power) with R² correlation.

Dedicated machine shop calculator: Spindle RPM, Surface Feet/Min (SFM), Feed Rate (IPM), Chip Load (IPT), ANSI drill & thread tables, Bolt Circle PCD coordinates, and Right-Triangle Shop Trig.

The definitive CFA, MBA, and banking financial analyst calculator. Algebraic TVM with CPT, Cash Flow (CF/NPV/IRR/NFV/PB), Amortization schedules, Bonds, Depreciation, Breakeven, and Profit margins.

Electricians and electrical contractor calculator: NEC wire sizing (Copper/Aluminum, 60°C/75°C/90°C), voltage drop solver, conduit sizing & fill % (EMT, PVC, RMC), motor Full Load Amps (FLA), and fuse sizing.

Pipefitters, sprinkler fitters, and welders calculator: Linear and rolling offsets, 45°/60°/any angle travel & run, fitting take-outs, weld cutbacks, arc lengths, and pipe schedule dimensions.

Dimensional feet-inch-fractions arithmetic, rafter pitch / rise / run / diagonal solver, stair layouts (risers & treads), and lumber board footage estimator.

HVAC contractors and sheet metal engineers: Airflow CFM, round and rectangular equivalent duct sizing, velocity (FPM), friction rate static pressure loss, and sensible/total BTUH heat loads.

Aviation flight computer: Wind correction angle (WCA), True Heading (TH), Ground Speed (GS), Fuel burn rate and endurance, Density Altitude & Pressure Altitude, and Weight & Balance CG.

Horizontal golden classic: 4-register RPN stack (X, Y, Z, T), Time Value of Money (N, i, PV, PMT, FV), loan amortization schedules, and investment cash flows.

12-digit commercial desktop calculator with programmable TAX+ / TAX-, Cost/Sell/Margin triad, Grand Total (GT), and Digital Audit Paper Tape.

Two-line natural textbook display, exact fraction conversions, engineering notation (ENG), DEG/RAD/GRAD trigonometry, and combinatorics.

Interactive 2D Canvas function plotter with touch pan, pinch-to-zoom, coordinate tracing, and Matrix algebra tab (Det, Invert, Transpose).

Quad-base simultaneous display (HEX, DEC, OCT, BIN), interactive 64-bit clickable bitboard, word sizing, and bitwise logic operations.

Quick access speeds and feeds solver, bolt pattern coordinates, and right-angle shop trigonometry.

Comprehensive fluid engineering suite: Reynolds number, flow regime detection (Laminar/Turbulent), Darcy friction factor (Swamee-Jain), Darcy-Weisbach pipe head loss, hydraulic cylinder actuator push/pull force and speed, pump horsepower/kW, hydrostatics, and Venturi/orifice discharge.

All-in-one physics and mechanics laboratory: 2D projectile motion with interactive live SVG trajectory plot, 1D linear SUVAT kinematics solver, conservation of momentum & collisions (elastic/inelastic), Ideal Gas Law (PV=nRT), Carnot heat engine efficiency, Special Relativity (Lorentz factor γ, time dilation, E=mc²), and fundamental constants library.

Universal color engineering suite: HEX, sRGB, HSL, CMYK print ink, and CIE L*a*b* conversion, WCAG 2.1 accessibility contrast ratio (AA/AAA), CIEDE2000 (ΔE₀₀) color matching, color harmonies, Planckian temperature (Kelvin), and visible spectrum wavelength.