*comnuan.com* is a website of online numerical calculators and web-based
applications, i.e. the applications are run on web browsers. Users are just required
to enter data, for example copy and paste or manual edit, click run, and check
the results. No code or just little code snippets, if any, will be written by the users.

**News! I created another website in thai for learning science, math, and computational science:**

- dmathsci.com

Oct 6, 2023

**New calculators were added to comnuan.com:**

- System of Nonlinear Equations

Last updated: Mar 8, 2021

- Rotation in two dimensions
- Rotation in three dimensions

Last updated: Feb 21, 2018

- Linear Equality-Constrained Least Squares
- Gauss-Markov Linear Model

Last updated: Feb 5, 2018

- Nonlinear Equations Calculator
- Unconstrained Optimization Calculator

Last updated: Jan 7, 2017

- Derivatives of f(x)
- Gradient Calculator
- Jacobian Calculator
- Hessian Calculator

Last updated: Dec 30, 2016

- Continued Fractions of Square Root
- Pell Equation Solver

Last updated: Dec 1, 2016

- Linear Programming Calculator
- Sparse Linear Programming Calculator
- Assignment Problem Calculator

Last updated: Oct 29, 2016