Math & Science
Calculators.
Geometry, statistics, unit conversions, and school tools — math made instant. Homework helpers, unit converters, geometry, statistics, and physics. The math you needed in school plus the math you wish you'd kept — explained in plain language with every formula visible.
- You're checking homework or studying for an exam and want the formula plus the worked answer.
- You're converting between units (metric, imperial, scientific, currency) and want a verified answer.
- You're solving a stats or physics problem and want each step shown, not just the result.
Pick by what you're deciding
The same pages, grouped by the question you're trying to answer.
School essentials
GPA, grade calculations, percentages, and the algebra building blocks.
Unit converters
Length, weight, temperature, energy, pressure, fuel efficiency — every unit and back.
Geometry & measurement
Area, perimeter, volume, distance, slope, Pythagorean — the shapes that show up in homework and home projects.
Statistics
Mean, standard deviation, confidence intervals, hypothesis tests, and the rest of the inferential toolkit.
Physics
Kinematics, force, energy, power, density — the equations you reach for in intro physics.
School
2 toolsGPA calculations and grade tracking — the academic essentials.
General Math
13 toolsPercentages, fractions, matrices, exponents, and logarithms — fundamental math operations made instant.
Percentage Calculator
Percentage of a number, increase, decrease, and difference.
Matrix Calculator
Add, multiply, find determinant, inverse, and solve linear systems.
Fraction Calculator
Add, subtract, multiply, and divide fractions.
Exponent Calculator
Calculate powers, roots, and fractional exponents.
Logarithm Calculator
Calculate log₁₀, ln, log₂, or any custom base with step-by-step work.
Scientific Notation Calculator
Convert numbers to/from scientific notation and perform ×, ÷, +, − operations.
Quadratic Formula Calculator
Solve ax²+bx+c=0 with roots, vertex, parabola chart, and step-by-step lesson.
Integral Calculator
Estimate definite integrals with Trapezoidal, Midpoint, and Simpson's Rule.
Concentration & Dilution Calculator
Calculate molarity, moles, volume, and C₁V₁=C₂V₂ dilutions for chemistry solutions.
Fourier Series Visualizer
Visualize square, sawtooth, and triangle wave reconstruction with animated phasor harmonic analysis.
Prime Factorization Calculator
Factor tree, GCD, and LCM — with step-by-step prime decomposition.
Unit Converters
13 toolsTen converters covering every physical quantity — temperature, length, weight, volume, speed, pressure, energy, area, fuel efficiency, and data storage.
Temperature
Celsius, Fahrenheit, Kelvin, and Rankine conversions.
Length Converter
Meters, miles, feet, inches, and light-years.
Weight / Mass
Kilograms, pounds, ounces, stone, and metric tons.
Volume Converter
Liters, gallons, cups, fluid ounces, and tablespoons.
Speed Converter
MPH, km/h, knots, Mach, and m/s.
Pressure Converter
PSI, bar, atm, pascal, and mmHg.
Energy Converter
Joules, calories, BTU, kWh, and electronvolts.
Area Converter
Acres, hectares, square feet, and square meters.
Fuel Efficiency
MPG (US/UK), L/100km, and km/L.
Data Storage
Bytes to petabytes — binary and decimal.
Number Base Converter
Convert between binary, octal, decimal, and hex with positional notation breakdown.
Roman Numeral Converter
Convert decimal numbers to Roman numerals and back with step-by-step breakdowns.
Dimensional Analysis
Chain conversion factors and watch units cancel step-by-step using the factor-label method.
Geometry
8 toolsArea, perimeter, volume, Pythagorean theorem, triangles, circles, slope, and distance — visual geometry with step-by-step solutions.
Area & Perimeter
Rectangle, square, and 8 shapes with formulas.
Volume Calculator
Sphere, cylinder, cone, box, and torus.
Pythagorean Theorem
Find hypotenuse, leg, or verify a right triangle.
Triangle Calculator
SSS, SAS, ASA, AAS, and SSA solving.
Circle Calculator
Radius, diameter, area, arc length, and sector.
Slope Calculator
Slope, y-intercept, and line equation from two points.
Distance Between Points
2D and 3D Euclidean distance with midpoint.
Polygon Area Calculator
Area of regular and irregular polygons by side length, apothem, or vertex coordinates.
Statistics
14 toolsStandard deviation, confidence intervals, p-values, z-scores, and correlation — statistics tools for research, school, and data analysis.
Standard Deviation
Population and sample SD, mean, and variance.
Confidence Interval
90, 95, and 99% CI with margin of error.
Descriptive Statistics
Mean, SD, quartiles, skewness, kurtosis, CI, z-scores, and outlier analysis from any dataset.
P-Value Calculator
Z-test and t-test, one and two-tailed.
Sample Size
Power analysis for surveys and experiments.
Z-Score Calculator
Find z-score, raw value, or percentile.
Normal Distribution
PDF, CDF, and range probability calculator.
Correlation Coefficient
Pearson r with scatter plot and regression.
Linear Regression
Slope, intercept, R², standard error, and predictions with residual analysis.
ANOVA
One-way ANOVA with F-statistic, p-value, eta-squared effect size, and Bonferroni post-hoc comparisons.
Probability Calculator
Basic probability, binomial distributions, nCr, nPr, and Monte Carlo simulation.
Expected Value
Weighted probability outcome calculator.
Mean, Median & Mode
Descriptive statistics, frequency distribution, and box plot.
Permutation & Combination
nPr and nCr with step-by-step factorial work, scenarios, and Pascal's Triangle.
Physics
10 toolsCore physics calculations — free fall, density, force, Newton's laws, velocity, power, and wave frequency with real-world examples and multi-unit support.
Free Fall Calculator
Time, velocity, and height for falling objects with gravity.
Density Calculator
Solve for density, mass, or volume — with material presets.
Force Calculator
F=ma, friction, centripetal, weight, and impulse forces.
Velocity Calculator
Average velocity, SUVAT equations, and unit converter.
Power Calculator
Mechanical power via work/time, force×velocity, or torque.
Newton's Laws Calculator
F=ma, friction force, inclined plane, and free body diagram.
Kinematics Calculator
Solve SUVAT equations for velocity, acceleration, distance, or time.
Wave & Frequency Calculator
Frequency, wavelength, period, wave speed — with EM spectrum and musical notes.
Energy & Work Calculator
Kinetic energy, potential energy, work, and power with unit conversions.
Heat Transfer Calculator
Q = mcΔT, conduction, convection, and Newton's law of cooling in one tool.
Frequently asked questions
Do these calculators show their work?
Yes. Every math, geometry, statistics, and physics calculator shows the formula, the substituted values, and the intermediate steps — not just the final number. The point is to learn the math, not bypass it.
Are the statistics tests accurate for small samples?
Each test labels its small-sample behavior. The confidence interval and t-test calculators automatically switch to t-distribution when n < 30. The hypothesis-test calculator flags when assumptions (normality, equal variance) are likely violated.
Can I use these for homework?
Absolutely — that's a primary use case. Every calculator shows the formula and steps so you can write them on your homework or quiz prep. Some math teachers don't allow calculators on tests; check yours.
Do the unit converters support scientific notation?
Yes. Inputs accept scientific notation (1.5e6, 6.022e23) and outputs use scientific notation automatically for very small or very large values. The Scientific Notation and Significant Figures calculators handle conversions and rounding rules explicitly.