Equation solver and numerical calculator
Equation Pad solves the numerical problems that come up in engineering and science: roots of functions, single equations and systems, integrals, derivatives, sums and differential equations, all with units.
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Solve equations and systems
root(f(x), x, 1) finds where a function is zero near a guess, or between two limits. solve(x^2 == 2, x, 1) solves one equation, and solve([x + y == 3, x - y == 1], [x, y], [1, 1]) solves a system. Units work throughout.
Calculus and differential equations
- Definite integrals:
integrate(f(x), x, 0, 2). - Derivatives, exact or at a point:
diff(f(x), x),diff(f(x), x, 2). - Sums:
summation(k^2, k, 1, 10). - Differential equations stepped through time with
ode, ready to plot. - Symbolic simplify and expand.
See the problem before you solve it
plot([f(x), 2], x, -1, 5) draws curves with a read-out under the mouse, so you can see where the roots are and choose a good guess.
Part of a full calculation
The solver lives inside a calculation sheet: define your inputs with units above it, use the answers below it, and issue the whole thing as a PDF or .docx document.
Also used for
- Structural calculations
- Worked examples
- Calculation sheets
- Report generator
- Online calculation pad
- Unit calculator
- Matrix calculator
- Graph plotter
- Spreadsheet with units
- For students
- Beam deflection
- Section properties
- Euler buckling
- Truss analysis
- Stiffness matrix method
- Natural frequency
- Principal stresses
- Pipe flow head loss
- Heat transfer, U-value
- Cable sag and tension
- Civil and mechanical
- Private and local
- .eqnpad files
Equation Pad runs in your browser, with nothing to install, and we never see or store your calculations. Results must be checked by a competent person before they are relied on; see the disclaimer.