Everyday Math
MAD Calculator
Find mean absolute deviation, the average, and a complete deviation table.
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Statistics
Binomial Distribution Calculator
Calculate exact, cumulative, at-least, and between probabilities.
Everyday Math
Integer Calculator
Add, subtract, multiply, and divide signed integers with exact results.
Geometry
Reflection Calculator
Reflect points across an axis, a diagonal, or a custom straight line.
Everyday Math
Squaring Calculator
Square a number or fraction and see the exact multiplication.
Everyday Math
Adding Decimals Calculator
Add multiple decimals exactly, with aligned place-value working.
Everyday Math
Square Root Simplifier
Turn a whole-number square root into its simplest radical form.
Geometry
Rotation Calculator
Rotate coordinate points around any center, with a visual comparison.
Everyday Math
Reciprocal Calculator
Find the reciprocal of a whole number, decimal, or fraction.
Time
Average Time Calculator
Average elapsed durations and see their total, minimum, and maximum.
Algebra
Interval Notation Calculator
Convert simple inequalities and interval unions into clear notation.
Algebra
Rational Function Calculator
Find domain exclusions, holes, intercepts, and asymptotes for quadratic ratios.
Algebra
Zeros of a Function Calculator
Find real polynomial roots through degree 6, plus quadratic complex roots.
Algebra
Parabola Calculator
Find a quadratic vertex, roots, axis, focus, and directrix.
Algebra
Three-Variable System Calculator
Solve three linear equations and identify inconsistent or dependent systems.
Physics
Projectile Motion Calculator
Estimate flight time, range, peak height, and the ideal trajectory.
Physics
Kinematics Calculator
Solve constant-acceleration displacement, velocity, acceleration, and time.
Algebra
Composite Function Calculator
Expand f(g(x)) or g(f(x)) for polynomial inputs and evaluate a point.
Algebra
Ordered Pairs Function Calculator
Test whether a relation is a function and list its domain and range.
Statistics
Cohen's d Calculator
Calculate a signed independent-group effect size using pooled standard deviation.
Everyday Math
Inverse Trigonometry Calculator
Find principal arcsin, arccos, and arctan angles in degrees or radians.
Everyday Math
Number Line Solver
Sort numbers and fractions, or plot a simple interval or inequality.
Everyday Math
Four-Function Calculator
Evaluate everyday arithmetic with parentheses and exact fraction results.
Calculus
Area Under a Graph Calculator
Find signed integrals and total geometric area for polynomial curves.
Everyday Math
Trigonometric Graphing Calculator
Graph transformed sine, cosine, or tangent with explicit angle units.
Everyday Math
Log Graphing Calculator
Graph a shifted logarithm and inspect its domain and intercept.
Savings & Planning
How Long Will My Money Last?
Explore savings coverage using your spending, income, inflation, and return assumptions.
Retirement
403(b) Calculator
Model a hypothetical 403(b) balance from the contributions and returns you choose.
Retirement
457(b) Calculator
Model a hypothetical 457(b) balance from the contributions and returns you choose.
Retirement
TSP Growth Calculator
Model a hypothetical TSP balance from the contributions and returns you choose.
Investing
VOO Investment Calculator
Explore a hypothetical investment scenario without live prices or return claims.
Savings & Planning
Monthly Savings Calculator
Project a future balance or solve for the monthly deposit needed for a target.
Investing
Monthly Dividend Calculator
Estimate annual dividend income and its average monthly equivalent.
Investing
Dividend Reinvestment Calculator
Compare reinvested dividends with keeping distributions as cash.
Paycheck Worksheets
Oklahoma Paycheck Calculator
A manual-withholding worksheet for your Oklahoma paycheck; tax amounts must be entered.
Paycheck Worksheets
Missouri Paycheck Calculator
A manual-withholding worksheet for your Missouri paycheck; tax amounts must be entered.
Paycheck Worksheets
Maryland Paycheck Calculator
A manual-withholding worksheet for your Maryland paycheck; tax amounts must be entered.
Paycheck Worksheets
Ohio Paycheck Calculator
A manual-withholding worksheet for your Ohio paycheck; tax amounts must be entered.
Paycheck Worksheets
Virginia Paycheck Calculator
A manual-withholding worksheet for your Virginia paycheck; tax amounts must be entered.
Paycheck Worksheets
Georgia Paycheck Calculator
A manual-withholding worksheet for your Georgia paycheck; tax amounts must be entered.
Paycheck Worksheets
Kentucky Paycheck Calculator
A manual-withholding worksheet for your Kentucky paycheck; tax amounts must be entered.
Paycheck Worksheets
Louisiana Paycheck Calculator
A manual-withholding worksheet for your Louisiana paycheck; tax amounts must be entered.
Paycheck Worksheets
Connecticut Paycheck Calculator
A manual-withholding worksheet for your Connecticut paycheck; tax amounts must be entered.
Paycheck Worksheets
Massachusetts Paycheck Calculator
A manual-withholding worksheet for your Massachusetts paycheck; tax amounts must be entered.
Unit Converters
Length Converter
Convert length units with a clear result and a complete equivalence table.
Unit Converters
Weight & Mass Converter
Convert mass units with a clear result and a complete equivalence table.
Unit Converters
Temperature Converter
Convert temperature units with a clear result and a complete equivalence table.
Unit Converters
Area Converter
Convert area units with a clear result and a complete equivalence table.
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