25 Free Tools
madplexus
A network of purpose-built calculators and tools for students, engineers, and professionals. No sign-ups. No ads. Just answers.
- 25 Tools
- 6 Categories
- 0 Cost
[ 5 tools ]
Data Visualization
Transform raw data into clear, interactive visual representations.
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Pie Chart Calculator
Create proportional pie and donut charts from your data sets.
piechartcalculator.com -
Scatter Plot Calculator
Plot and analyze relationships between two variables.
scatterplotcalculator.com -
Histogram Calculator
Build frequency distributions and histogram visualizations.
histogramcalculator.com -
Stem and Leaf Plot Calculator
Generate stem-and-leaf displays for data distribution analysis.
stemandleafplotcalculator.com -
Box Plot Calculator
Visualize data spread with quartiles, medians and outliers.
boxplotcalculator.com
[ 4 tools ]
Linear Algebra & Matrices
Solve matrix operations, systems of equations, and linear transformations.
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Augmented Matrix Calculator
Build and solve augmented matrices for systems of equations.
augmentedmatrixcalculator.com -
Reduced Row Echelon Form
Transform matrices to RREF with step-by-step solutions.
reducedrowechelonformcalculator.com -
Matrix Calculator
Addition, subtraction, multiplication, determinants, eigenvalues, null space and more.
matrixcalculator.com -
Gaussian Elimination Calculator
Solve linear systems using Gaussian and Gauss-Jordan elimination.
gaussianeliminationcalculator.com
[ 5 tools ]
Inferential Statistics
Draw conclusions from data using hypothesis testing and probability distributions.
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Descriptive Statistics Calculator
Compute mean, median, mode, variance, and standard deviation.
descriptivestatisticscalculator.com -
Standard Error Calculator
Calculate the standard error of the mean for sample data.
standarderrorcalculator.com -
Sampling Distribution Calculator
Model sampling distributions and calculate probabilities.
samplingdistributioncalculator.com -
Central Limit Theorem Calculator
Demonstrate CLT convergence with interactive sample sizes.
centrallimittheoremcalculator.com -
Test Statistic Calculator
Compute z-scores, t-statistics, chi-square and F-values.
teststatisticcalculator.com
[ 6 tools ]
Math & Calculus
Differentiation, limits, error analysis, and fundamental mathematical operations.
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Gradient Calculator
Find partial derivatives and gradient vectors for multivariable functions.
gradientcalculator.com -
L'Hôpital's Rule Calculator
Evaluate indeterminate limits using L'Hôpital's rule.
lhopitalsrulecalculator.com -
Critical Point Calculator
Find and classify critical points of single and multivariable functions.
criticalpointcalculator.com -
Percent Error Formula
Calculate percentage error between experimental and actual values.
percenterrorformula.com -
Unit Circle Chart
Interactive unit circle with trigonometric values and angle conversions.
unitcirclechart.com -
Diamond Problem Solver
Solve diamond math problems for factoring practice.
diamondproblemsolver.com
[ 2 tools ]
Education & Exams
Academic planning tools for students and educators.
[ 3 tools ]
Health & Wellness
Fitness calculators, breathing exercises, and environmental safety tools.