Math Calculators
Algebra, geometry, statistics, probability, conversions and more — solve math problems instantly with our free calculators.
0-60 Calculator
0-60 Calculator is a free online calculator that helps you work out 0-60 quickly and accurately, right in your browser.
34 Hour Reset Calculator
Calculates 34 hour reset using Reset complete = start date and time + 34 hours, in real time in your browser.
45 Minute Lunch Break Calculator
Calculate your total paid work hours by automatically deducting a 45-minute lunch break using Paid hours = (clock-out − clock-in) − 45 minutes, in real time in your browser.
60/40 Split Calculator – Divide Any Amount Instantly
Calculates 60 40 split using this free 60/40 split calculator to quickly divide any total into a 60% share. 60% share = total × 0.60, instantly in your browser.
7 Minute Rule Calculator
Calculates 7 minute rule using Round total to nearest 15 min: 1–7 min down, 8–14 min up, instantly in your browser.
Absolute Deviation Calculator
Absolute Deviation Calculator is a free online calculator that helps you work out absolute deviation quickly and accurately, right in your browser.
Angle Of Impact Calculator
Calculates angle of impact using Angle of impact = arcsin(width / length), in real time in your browser.
Antilog Calculator
An Antilog Calculator is a free online tool that solves antilog formula using antilog formula, inverse logarithm, 10^x. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations against published guidance from Wolfram MathWorld.
Apparent Size Calculator
Calculates apparent size using θ = 2 × atan(size ÷ (2 × distance)), instantly in your browser.
Apr To Apy Converter
Converts apr to apy using APY = (1 + APR/n)^n - 1, instantly in your browser.
Aquarium Capacity Calculator
Calculates aquarium capacity using US gallons = (L × W × H in inches) ÷ 231, in real time in your browser.
Area Calculator
An Area Calculator is a free online tool that solves how to find area using how to find area, area of rectangle, area of circle. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Arithmetic Sequence Calculator
Find the nth term and sum of an arithmetic sequence from the first term and common difference.
Average Rate of Change Calculator
Average Rate of Change Calculator is a free online calculator that helps you work out average rate of change quickly and accurately, right in your browser.
Big Number Calculator
A Big Number Calculator is a free online tool that solves large number arithmetic using large number arithmetic, arbitrary precision, factorial of large numbers. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Binary Calculator
A Binary Calculator is a free online tool that solves binary to decimal using binary to decimal, decimal to binary, binary addition. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Binomial Formula Calculator
Calculates binomial formula using P(X = k) = C(n,k) × pᵏ × (1−p)ⁿ⁻ᵏ, instantly in your browser.
Boyle’s Law Calculator
Boyle's Law Calculator is a free online calculator that helps you work out boyle's law quickly and accurately, right in your browser.
Calculator Pool
Calculates pool volume using Gallons = length × width × average depth (ft) × 7.48, in real time in your browser.
Chi Square Calculator Online
Calculates chi square using χ² = Σ (Observed − Expected)² ÷ Expected, live in your browser.
Circle Calculator
A Circle Calculator is a free online tool that solves area of a circle using area of a circle, circumference calculator, pi formula. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Coefficient of Determination Calculator
Computes R², Pearson correlation and the regression line from paired x-y data, with interpretation.
Coefficient Variation Calculator
Calculates coefficient of variation using CV = (s ÷ |x̄|) × 100%, s = √(Σ(x−x̄)²÷(n−1)) for samples, in real time in your browser.
Combined Gas Calculator
Calculates combined gas law using P₂ = P₁ × V₁ × T₂ ÷ (T₁ × V₂), temperatures in kelvin, right in your browser.
Confidence Interval Calculator
A Confidence Interval Calculator is a free online tool that solves 95% confidence interval using 95% confidence interval, margin of error, statistical significance. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Convert Lbs To Liters Calculator
Calculates lbs to liters using Liters = (lb × 0.45359237 kg) ÷ density (kg/L), in real time in your browser.
Cross Product Calculator
Cross Product Calculator is a free online calculator that helps you work out cross product quickly and accurately, right in your browser.
Diamond Problem Calculator
Solve diamond math problems: find the two numbers from their sum and product, with a diagram.
Dimensional Analysis Calculator
Dimensional Analysis Calculator is a free online calculator that helps you work out dimensional analysis quickly and accurately, right in your browser.
Distance Calculator
A Distance Calculator is a free online tool that solves distance between cities using distance between cities, Haversine formula, how far is it. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Drop Chance Calculator
Drop Chance Calculator is a free online calculator that helps you work out the drop chance calculator to determine the probability of an item dropping quick and accurately, right in your browser.
Dry Well Calculator
Calculates dry well using Required volume (ft³) = drainage area (sq ft) × rainfall (inches) ÷ 12, live in your browser.
Endpoint Calculator
Finds the missing endpoint of a segment from its midpoint and known endpoint, plus the segment's length and slope.
Energy Foot Pounds Calculator
Calculates foot pounds using Work (ft-lb) = Force (lb) x Distance (ft), instantly in your browser.
Error Function Calculator
Calculates error function using erf(x) = (2/√π) ∫₀ˣ e^(−t²) dt, instantly in your browser.
Exponent Calculator
An Exponent Calculator is a free online tool that solves how to calculate exponents using how to calculate exponents, power calculator, negative exponents. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Factor Calculator
A Factor Calculator is a free online tool that solves prime factorization calculator using prime factorization calculator, factors of a number, how to find factors. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Fill Dirt Calculator
Fill Dirt Calculator is a free online calculator that helps you work out fill dirt quickly and accurately, right in your browser.
Flow Capacity Calculator
Calculates flow capacity using Q = A × v, where A = π × (diameter ÷ 2)² and v is the flow velocity, right in your browser.
Foundation Squaring Calculator
Calculates foundation squaring using Diagonal = √(length² + width²), live in your browser.
Fraction Calculator
A Fraction Calculator is a free online tool that solves adding fractions using adding fractions, add fractions with different denominators, simplifying fractions. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Fraction to Decimal Calculator
Convert fractions to decimals with exact repeating digits detected and shown.
Fraction to Percent Calculator
Convert any fraction or mixed number to a percentage with the division steps shown.
G-force Calculator
Calculates g force using g = a / 9.80665, in real time in your browser.
GCF Calculator
A GCF calculator finds the greatest common factor — the largest number that divides them all — of two or more whole numbers.
Geographic Midpoint Calculator
Calculates geographic midpoint using Great-circle midpoint of two (lat, lon) points using spherical trigonometry, instantly in your browser.
Geometric Mean Rate Of Return Calculator
Calculates geometric mean rate of return using Geometric mean = [(1+r₁)(1+r₂)…(1+rₙ)]^(1/n) − 1, in real time in your browser.
Half-Life Calculator
A Half-Life Calculator is a free online tool that solves radioactive decay calculator using radioactive decay calculator, exponential decay, how to calculate half-life. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Hex Calculator
A Hex Calculator is a free online tool that solves hexadecimal calculator using hexadecimal calculator, hex to decimal, decimal to hex. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Ideal Gas Calculator
Ideal Gas Calculator is a free online calculator that helps you work out ideal gas quickly and accurately, right in your browser.
Inverse Cos Calculator
Calculates inverse cosine using θ = cos⁻¹(x), defined for −1 ≤ x ≤ 1, live in your browser.
Inverse Sine Calculator | Arcsin Angle Tool
Arcsin of any value between −1 and 1, in degrees and radians, with the second solution.
KE Calculator (Kinetic Energy)
KE Calculator (Kinetic Energy) is a free online calculator that helps you work out ke (kinetic energy) quickly and accurately, right in your browser.
Lcd Of Fractions Calculator
Calculates lcd using LCD = LCM of the denominators, in real time in your browser.
Leap Calculator
Calculates leap year using Leap year if divisible by 4, except centuries not divisible by 400, live in your browser.
Least Common Multiple Calculator
A Least Common Multiple Calculator is a free online tool that solves LCM calculator using LCM calculator, how to find LCM, lowest common multiple. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Limiting Reactant Calculator
Limiting Reactant Calculator is a free online calculator that helps you work out limiting reactant quickly and accurately, right in your browser.
Log Base 2 Calculator
Log Base 2 Calculator is a free online calculator that helps you work out log base 2 quickly and accurately, right in your browser.
Log Calculator
A Log Calculator is a free online tool that solves logarithm calculator using logarithm calculator, natural log, log base 10. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Matrix Calculator
A Matrix Calculator is a free online tool that solves matrix multiplication using matrix multiplication, matrix determinant, inverse matrix. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Mean Squared Error Calculator
Calculates mean squared error using MSE = (1/n) × Σ (yᵢ − ŷᵢ)², right in your browser.
Mean, Median, Mode, Range Calculator
A Mean, Median, Mode, Range Calculator is a free online tool that solves average calculator using average calculator, how to find median, what is mode in math. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Midpoint Formula Calculator
Midpoint Formula Calculator is a free online calculator that helps you work out midpoint formula quickly and accurately, right in your browser.
Modulo Calculator
A Modulo Calculator is a free online tool that solves modulo operation using modulo operation, modulus math, mod arithmetic. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations against published guidance from NIST Mathematics Encyclopedia.
Months To Weeks Converter
Converts months to weeks using weeks = months × (365.25 ÷ 12) ÷ 7 = months × 4.348, instantly in your browser.
Multiples Calculator
Calculates multiples using n-th multiple of x = n × x (n = 1, 2, 3, …), in real time in your browser.
Multiply Recipe Calculator
Calculates recipe multiplier using Scaled amount = amount × (desired servings ⁄ original servings), right in your browser.
Nautical Mile Converter
Converts nautical mile using km = nmi × 1.852, live in your browser.
Net Terms Calculator
Calculates net terms using Due date = invoice date + net days (15, 30, 45, 60 or 90), instantly in your browser.
Newton Calculator
Calculates newton using F = m × a (newtons), where m is mass in kg and a is acceleration in m/s², right in your browser.
Normal Distribution Calculator
Normal probabilities below, above or between values, plus the inverse from a probability.
Npv Calculator Online
Calculates npv using NPV = Σ CFₜ ÷ (1 + r)ᵗ, t = 0 … n, in real time in your browser.
P Value Calculator For Student T Test
Calculates p value for student t test using p = P(T ≥ |t|) from the Student t-distribution with df degrees of freedom, in real time in your browser.
P-Value from Z-Score Calculator
Convert a z-score to its left-, right- or two-tailed p-value with significance verdicts.
Pallet Cube Calculator
Calculates pallet cube using Cube (ft³) = (L × W × H in inches) ÷ 1728, right in your browser.
Percent Deviation Calculator
Calculates percent deviation using Percent deviation = |measured − reference| ÷ reference × 100, instantly in your browser.
Percent Error Calculator
Find percent error from measured and actual values with absolute, relative and signed error.
Percentage Calculator
A percentage calculator solves the four common percent questions: what is X% of Y, X is what percent of Y, what is the percent change from X to Y, and X is Y% of what number. It is the everyday utility tool for tipping, discounts, taxes, grades, and any quick "what fraction of" arithmetic without a calculator app.
Percentile Range Calculator
Computes the spread between any two percentiles of a data set — interquartile range, P10–P90 or any custom band.
Perimeter Of Polygon Calculator
Calculates perimeter of polygon using P = n × a, live in your browser.
Permutation and Combination Calculator
A Permutation and Combination Calculator is a free online tool that solves nPr calculator using nPr calculator, nCr calculator, how many ways to arrange. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Population Proportion Calculator
Estimates a population proportion from sample counts: p̂, standard error, margin of error and confidence interval.
Population Rate Calculator
Calculates population rate using Rate = events ÷ population × base (1,000 or 100,000), in real time in your browser.
Probability Calculator
A Probability Calculator is a free online tool that solves how to calculate probability using how to calculate probability, independent events, conditional probability. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Pythagorean Theorem Calculator
A Pythagorean Theorem Calculator is a free online tool that solves a squared plus b squared using a squared plus b squared, hypotenuse calculator, right triangle formula. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Quadratic Formula Calculator
A Quadratic Formula Calculator is a free online tool that solves solve quadratic equation using solve quadratic equation, ax2+bx+c=0, discriminant calculator. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Ratio Calculator
A Ratio Calculator is a free online tool that solves how to simplify a ratio using how to simplify a ratio, ratio to fraction, ratio proportion. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Right Trapezoid Calculator
Calculates the area, slant side, perimeter, diagonals and angles of a right trapezoid from its two parallel bases and height.
Right Triangle Calculator
A right triangle calculator finds the hypotenuse, area, perimeter, and angles of a right triangle from its two legs using the Pythagorean theorem.
Rng Simulator
Calculates rng simulator using n = ⌊random() × (max − min + 1)⌋ + min per draw, right in your browser.
Root Calculator
A Root Calculator is a free online tool that solves square root calculator using square root calculator, cube root, nth root. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Rounding Calculator
A Rounding Calculator is a free online tool that solves how to round numbers using how to round numbers, rounding to nearest tenth, rounding rules. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Sample Size Calculator
A Sample Size Calculator is a free online tool that solves how many survey respondents using how many survey respondents, statistical sample size, margin of error. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Scientific Calculator
An online scientific calculator performs advanced math beyond a basic calculator: trigonometry (sin, cos, tan), logarithms (log and ln), exponents and powers, square and nth roots, factorials, the constants π and e, and parentheses for correct order of operations. It runs in your browser with no download.
Scientific Notation Calculator
A scientific notation calculator converts numbers to and from scientific notation (a x 10^n), making very large or very small values easy to read.
Sector Calculator
Calculates sector area using Area = ½ r² θ (θ in radians), in real time in your browser.
Sigma Level Calculator
Calculates sigma level using DPMO = D ÷ (U × O) × 10⁶, right in your browser.
Sin Cos Converter
Converts sin cos using sin²θ + cos²θ = 1, right in your browser.
Sine Bar Calculator
Calculates sine bar using H = L × sin(θ), where L is the sine bar length and θ is the set angle, live in your browser.
Skewed Distribution Calculator
Measures how skewed a data set is: sample skewness, excess kurtosis, mean vs median and a plain-English shape classification.
Slope Calculator
A Slope Calculator is a free online tool that solves slope formula using slope formula, rise over run, slope intercept form. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Square Cube Law Calculator
Calculates square cube law using Area scales as k², Volume scales as k³ when every length is scaled by k, right in your browser.
Standard Based Grading Calculator
Calculates standards based grading using Decaying avg: aₙ = 0.35·aₙ₋₁ + 0.65·scoreₙ, right in your browser.
Standard Deviation Calculator
A Standard Deviation Calculator is a free online tool that solves how to calculate standard deviation using how to calculate standard deviation, variance calculator, population vs sample SD. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Statistics Calculator
A Statistics Calculator is a free online tool that solves descriptive statistics calculator using descriptive statistics calculator, statistical analysis tool, data set statistics. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Summation Of Series Calculator
Calculates summation of series using aₙ = a + (n−1)d, in real time in your browser.
Surface Area Calculator
A surface area calculator finds the total surface area of 3-D shapes such as cubes, spheres, cylinders, and cones from their dimensions.
Tank Calculator
Calculates tank volume using Gallons = L(ft) × W(ft) × H(ft) × 7.48052, live in your browser.
Terminal Value Calculator
Calculates terminal value using TV = FCF × (1 + g) ÷ (r − g), requires r > g, instantly in your browser.
Theoretical Yield Calculator
Theoretical Yield Calculator is a free online calculator that helps you work out theoretical yield quickly and accurately, right in your browser.
Tonnage Calculator
Tonnage Calculator is a free online calculator that helps you work out tonnage quickly and accurately, right in your browser.
Triangle Calculator
A Triangle Calculator is a free online tool that solves triangle area calculator using triangle area calculator, triangle angles, law of sines. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Tube Calculator
Calculates tube volume using Volume = (π⁄4) × (OD² − ID²) × length, in real time in your browser.
Upper And Lower Bound Calculator
Calculates upper and lower bound using Lower bound = value − unit ÷ 2, live in your browser.
Variance Calculator
Variance Calculator is a free online calculator that helps you work out variance quickly and accurately, right in your browser.
Vector Subtraction Calculator
Calculates vector subtraction using A − B = (aₓ − bₓ, aᵧ − bᵧ), live in your browser.
Volume Calculator
A Volume Calculator is a free online tool that solves volume of a box using volume of a box, volume formula, volume of sphere. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.
Weeks From Today Calculator
Calculates weeks from today using Result = start date + (weeks × 7) days, instantly in your browser.
Year Over Year Change Calculator
Calculates year over year change using YoY % = (current − previous) ÷ |previous| × 100, in real time in your browser.
Z Test Calculator
Calculates z test using z = (x-bar - mu) / (sigma / sqrt(n)), instantly in your browser.
Z-score Calculator
A Z-score Calculator is a free online tool that solves z-score formula using z-score formula, standard score, normal distribution z-score. Students, teachers, and engineers use it to check homework, prep for exams, and verify hand calculations.