A powerful, hardware-accurate scientific calculator featuring Natural Textbook Display (Natural-V.P.A.M.), exact fractions, surds, complex numbers, matrices, vectors, polynomial equation solvers, and calculus.
Faithfully replicating all 8 specialized environments of the Casio fx-991ES PLUS. Press the MODE key on the calculator to switch at any time.
Arithmetic, trigonometric, hyperbolic, logarithmic, and power calculations. Includes Simpson's Rule definite numerical integrals ∫dx, numerical derivatives d/dx, and summations Σ.
Full complex arithmetic in rectangular (a+bi) and polar (r∠θ) forms. Calculate absolute magnitude, argument angle, complex conjugate, and convert between coordinate systems.
Single-variable statistics (mean x̄, standard deviations σx / sx, median, quartiles Q1/Q3) and 6 regression models: Linear (A+Bx), Quadratic (A+Bx+Cx²), Logarithmic, Exponential, and Power.
Base conversion and bitwise logic operations. Supports 32-bit two's complement signed integer calculations with bitwise AND, OR, XOR, XNOR, NOT, and NEG operations.
Closed-form analytical solvers for 2 and 3 unknown simultaneous linear systems, quadratic equations ax²+bx+c=0 (with exact complex roots and vertex extrema X-Value / Y-Value), and cubic equations.
Store and operate on up to 3 matrices (MatA, MatB, MatC) from 1×1 to 3×3. Compute matrix addition, subtraction, multiplication, inverse (MatA⁻¹), determinant (det), and transpose (Trn).
Generate an evaluation table of f(X) across any range specified by Start, End, and Step values. Great for finding intercepts, turning points, and sketching graph behaviors.
Perform 2D and 3D vector calculations with VctA, VctB, and VctC. Evaluate dot product (Dot), vector cross product (VctA × VctB), vector addition/subtraction, and magnitude / norm Abs(VctA).
Quickly access 40 official CODATA physical constants (press SHIFT + 7) and 40 NIST metric unit conversions (press SHIFT + 8).
| Code | Symbol | Value |
|---|---|---|
| 01 | mp (Proton Mass) | 1.6726219 × 10⁻²⁷ kg |
| 02 | mn (Neutron Mass) | 1.6749275 × 10⁻²⁷ kg |
| 03 | me (Electron Mass) | 9.1093837 × 10⁻³¹ kg |
| 06 | h (Planck Constant) | 6.62607015 × 10⁻³⁴ J·s |
| 17 | u (Atomic Mass Unit) | 1.66053906 × 10⁻²⁷ kg |
| 24 | NA (Avogadro Constant) | 6.02214076 × 10²³ mol⁻¹ |
| 25 | k (Boltzmann Constant) | 1.380649 × 10⁻²³ J/K |
| 28 | c (Speed of Light) | 299,792,458 m/s |
| 35 | g (Std Gravitational Accel) | 9.80665 m/s² |
| 39 | G (Newton Gravitational) | 6.6743 × 10⁻¹¹ m³/(kg·s²) |
| 40 | atm (Standard Atmosphere) | 101,325 Pa |
| Code | Conversion | Formula |
|---|---|---|
| 01 | in ► cm | 1 in = 2.54 cm |
| 02 | cm ► in | 1 cm ≈ 0.3937 in |
| 03 | ft ► m | 1 ft = 0.3048 m |
| 04 | m ► ft | 1 m ≈ 3.2808 ft |
| 19 | km/h ► m/s | ÷ 3.6 |
| 20 | m/s ► km/h | × 3.6 |
| 23 | lb ► kg | 1 lb = 0.453592 kg |
| 24 | kg ► lb | 1 kg ≈ 2.20462 lb |
| 37 | °F ► °C | (°F - 32) × 5/9 |
| 38 | °C ► °F | °C × 9/5 + 32 |
| 39 | J ► cal | 1 J ≈ 0.239006 cal |
Type math effortlessly directly from your computer keyboard.
| Computer Key | Action / Function | Example / Note |
|---|---|---|
| Enter | Execute calculation (=) | Evaluates the active expression |
| Backspace | Delete preceding character (DEL) | Removes token to the left of cursor |
| Escape | All Clear (AC) / Close modal | Clears active expression back to 0 |
| ▲ / ▼ | Browse calculation history / Switch template fields | Recall past expressions |
| ◀ / ▶ | Navigate expression cursor | Insert tokens anywhere in equation |
| sin(, cos(, tan( | Auto-expands function names | Typing sin( automatically opens sin( |
| / or ÷ | Division operator | Auto-replaces with Casio ÷ |
| * or × | Multiplication operator | Auto-replaces with Casio × |
Everything you need to know about using and embedding the MyMathsClub Scientific Calculator.
This calculator provides 8 comprehensive modes: general arithmetic with numerical derivatives and definite integrals (COMP), complex numbers in rectangular and polar form (CMPLX), single-variable stats and 6 regression models with normal distribution probabilities (STAT), base-n binary, octal, decimal, and hexadecimal arithmetic (BASE-N), quadratic, cubic, and simultaneous equation solving (EQN), full matrix operations (MATRIX), numerical function tables (TABLE), and 2D/3D vector calculations (VECTOR).
Just like physical Casio calculators, results are automatically presented in simplified exact form (fractions like 3/4, surds like 2√3, and multiples of π like π/2). Pressing the S⇔D key (or clicking the a b/c button on the toolbar) toggles the answer into decimal format and back.
Yes! The calculation engine strictly adheres to Casio fx-991ES Priority 7 implicit multiplication rules. Expressions such as 6 ÷ 2(1+2) bind implicit multiplication before division, evaluating to 1 as expected by math instructors and exams.
Press MODE and choose 5: EQN. Select 3: ax² + bx + c = 0 for quadratic equations or 4: ax³ + bx² + cx + d = 0 for cubic equations. Enter your coefficients and click Calculate to view all real and complex roots, plus vertex coordinate extrema.
Yes! The calculator scales dynamically to fit any phone, tablet, laptop, or projector screen via our responsive fitCalculator() engine with tactile touch audio feedback.