OneTaskFree Maths Calculators
Averages, Primes, Quadratics, Fractions and Trig With Working Shown
Maths calculators that show the working, not just the answer. Add fractions, simplify a ratio, round to significant figures, check whether a number is prime, find the GCF or LCM, solve a quadratic, or get the mean and standard deviation of a data set. Every page explains the method so you can check a result by hand or learn how it was reached.
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Log Calculator
Logarithms in base 10, e, 2 or any base, and antilogs.
Log Calculator
Logarithms in base 10, e, 2 or any base, and antilogs.
UpdatedRatio Calculator
Simplify a ratio, split an amount in it, or scale it up.
UpdatedRatio Calculator
Simplify a ratio, split an amount in it, or scale it up.
GCF Calculator
Greatest common factor of two or more numbers, with every step.
GCF Calculator
Greatest common factor of two or more numbers, with every step.
Arithmetic 17
Fractions, ratios, rounding, powers, roots and logarithms.
Decimal To Fraction Calculator
Decimals to simplified fractions, recurring decimals and inch fractions included.
Exponent Calculator
Raise a number to any power, with exact results for big powers.
UpdatedFraction Calculator
Add, subtract, multiply and divide fractions, with the working shown.
NewFraction To Decimal Calculator
Fractions and mixed numbers to decimals, repeating digits marked.
Log Calculator
Logarithms in base 10, e, 2 or any base, and antilogs.
NewLong Division Calculator
Long division with every step shown, remainders or decimals.
NewLong Multiplication Calculator
Column multiplication with every row and the final sum shown.
NewMixed Number Calculator
Add, subtract, multiply and divide mixed numbers with steps.
Modulo Calculator
Find a mod n for huge or negative numbers in every convention.
NewMultiplication Chart
Multiplication grid for any range of numbers, up to 30 by 30.
NewPercent To Fraction Calculator
Percentages to simplified fractions and decimals, with working.
NewPercentage Change Calculator
Percentage change from old to new, with working and average rate.
UpdatedRatio Calculator
Simplify a ratio, split an amount in it, or scale it up.
Root Calculator
Square, cube and nth roots, with the radical simplified.
Rounding Calculator
Round to decimal places or the nearest 10, with five rounding rules.
Significant Figures Calculator
Count significant figures and round to any number of them.
NewTimes Tables Practice
Timed times tables quiz that re-asks the facts you miss.
Number Theory 6
Primes, factors, GCF, LCM and factorials, worked out exactly.
Factor Calculator
All the factors, factor pairs and prime factorisation of a number.
Factorial Calculator
Exact n factorial up to 5000!, with digits and trailing zeros.
GCF Calculator
Greatest common factor of two or more numbers, with every step.
LCM Calculator
Least common multiple of two or more numbers, with the working.
NewPrime Factorisation Calculator
Prime factors of any number, with the division ladder shown.
Prime Number Checker
Check if a number is prime, or list the primes in a range.
Algebra and Geometry 25
Quadratic equations and right triangles, solved with the working.
Arc Length And Sector Area Calculator
Arc length, sector area, chord and segment from radius and angle.
NewArea Calculator
Area of eleven common 2D shapes, with the working shown.
NewCircle Calculator
Radius, diameter, circumference and area from any one of them.
NewCompleting The Square Calculator
Vertex form, vertex and roots of any quadratic, step by step.
NewDeterminant And Inverse Matrix Calculator
Determinant and inverse of a square matrix, as exact fractions.
NewDistance Formula Calculator
Distance between two points, with the exact root and working.
NewExponential Growth And Decay Calculator
Final amount, doubling time or half-life for steady percentage growth or decay.
NewInequality Calculator
Solve a linear or double inequality, with interval notation and the number line.
NewLaw Of Sines And Cosines Calculator
Missing sides and angles by the law of sines or cosines.
NewLinear Equation Calculator
Solve one-variable linear equations with full working.
NewMatrix Calculator
Matrix multiplication, addition and transpose with working.
NewMidpoint Calculator
Midpoint of a segment, or the missing endpoint from the midpoint.
NewPerimeter Calculator
Perimeter of twelve common 2D shapes, with the working shown.
NewPolynomial Root Calculator
Real and complex roots of any polynomial, with factorisation.
NewProportion Calculator
Find the missing number in a/b = c/d, with the cross multiplication shown.
Pythagorean Theorem Calculator
Find the hypotenuse or a missing side of a right triangle.
Quadratic Equation Calculator
Solve ax² + bx + c = 0, with exact roots and the vertex.
NewRegular Polygon Calculator
Every measurement of a regular polygon from one known value.
NewRight Triangle Calculator
Every side and angle of a right triangle from any two values.
NewSlope Calculator
Slope, y = mx + b, angle and grade from two points.
NewSlope-Intercept Form Calculator
Slope, intercepts and every form of a line from two points.
NewSurface Area Calculator
Total and side surface area of eleven 3D solids.
NewSystem Of Equations Calculator
Solve simultaneous equations with every elimination step.
NewTriangle Calculator
Every side, angle and the area of a triangle from three known parts.
NewVolume Calculator
Volume of eleven common 3D solids, with the working shown.
Statistics 15
Averages, standard deviation, probability and combinations.
Average Calculator
Mean, median, mode and range of any list of numbers.
NewBinomial Probability Calculator
Exactly, at most and at least k successes in n trials.
NewConfidence Interval Calculator
Confidence interval for a mean, using t or z.
NewCorrelation Coefficient Calculator
Pearson r, Spearman rho and significance from paired data.
NewExpected Value Calculator
Expected value, variance and SD of a set of outcomes.
NewFive Number Summary Calculator
Min, quartiles, median, max, IQR and outliers.
NewLinear Regression Calculator
Least-squares line of best fit, R² and predictions.
NewMargin Of Error Calculator
Plus-or-minus for a poll or survey result.
NewNormal Distribution Calculator
Areas under any bell curve, and values at a percentile.
NewPercentile Calculator
Value at a percentile, or percentile rank of a value.
Permutation And Combination Calculator
nCr and nPr, with and without repetition, exact to the last digit.
Probability Calculator
Combine two probabilities, and the odds of at least once.
NewSample Size Calculator
How many responses a survey needs.
Standard Deviation Calculator
Sample and population standard deviation and variance of a list.
NewZ-Score Calculator
Z-score, percentile and tail areas from a value, mean and SD.
Trigonometry and Calculus 9
Trig values, graphs, derivatives, integrals and sums, with the working.
Arithmetic Sequence Calculator
The nth term, the sum and the rule, with the working.
NewDefinite Integral Calculator
The integral between two limits, the area and the average value.
NewDerivative Calculator
Derivatives with the rules shown, plus the tangent at a point.
NewFunction Grapher
Graph up to three functions with roots and turning points marked.
NewGeometric Sequence Calculator
The nth term, the sum and the infinite sum, with the working.
NewInteractive Unit Circle
Drag the angle and see sin, cos and tan as lengths.
NewSummation Calculator
Sigma notation sums with the terms written out.
NewTrig Calculator
All six trig functions and their inverses, with exact values.
NewDegrees To Radians
Convert degrees to radians: multiply by π/180.
How the maths tools are organised
Arithmetic covers the everyday operations: fractions, ratios, rounding, significant figures, modulo, powers, roots and logarithms. Number theory is about whole numbers: primes, factors, the greatest common factor, the least common multiple and factorials. Algebra and geometry solves quadratic equations and right triangles. Statistics finds averages, standard deviation, the probability of combined events and the number of permutations and combinations.
Exact where it matters
Whole-number tools such as the GCF, LCM, factorial and prime checker work with exact integers of any length, so 50! or a 30-digit prime comes out digit for digit instead of as a rounded decimal. The fraction calculator keeps answers as fractions, and the quadratic solver gives surd and complex roots in exact form alongside the decimals.
Maths or math?
The tools use British terms first and the American ones alongside: highest common factor (HCF) is the same thing as the greatest common factor (GCF), and maths and math mean the same subject. Where a convention changes the answer, such as rounding half to even or the sign of a negative remainder, the page shows each version side by side.
FAQ
Do these maths calculators show the working?
Yes. Each calculator shows the steps or formula behind the answer, such as the common denominator in a fraction sum, Euclid's algorithm for the GCF or the discriminant of a quadratic, so you can follow the method and check it by hand.
Are the answers exact or rounded?
Whole-number tools use exact arithmetic of any length, so factorials, powers and primes are shown digit for digit. Decimal results such as roots, logarithms and standard deviations are rounded to about ten significant figures, which is more than any school or work task needs.
Is my data sent anywhere?
No. Every calculation runs in your browser, so the numbers and data sets you type never leave your device. The pages keep working offline once they have loaded, which is handy for homework or quick checks without a connection.
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