Maths Calculators
Percentages, fractions, statistics, base conversions and equation solvers — instant answers.
Percentage Calculator
Three modes: X% of Y, percentage change, and what-percent.
Fraction Calculator
Add, subtract, multiply or divide two fractions.
Average Calculator
Mean, median, mode, range — paste a list of numbers.
Standard Deviation Calculator
Population and sample standard deviation with variance.
Scientific Calculator
Evaluate an expression — supports ^, sqrt, log, ln, sin, cos, tan, pi, e.
Scientific Notation Calculator
Convert between decimal, scientific and E notation.
Binary & Base Converter
Convert between binary, decimal, octal and hex.
Hex Calculator
Hex conversion and arithmetic.
Roman Numeral Converter
Convert between numbers and Roman numerals.
GCF & LCM Calculator
GCF and LCM of a list of numbers.
Ratio Calculator
Simplify a ratio or solve a proportion.
Rounding Calculator
Round to decimal places or significant figures.
Random Number Generator
Random numbers in a range — single or multiple draws.
Exponent Calculator
x raised to the power y — negative and fractional exponents supported.
Logarithm Calculator
Logarithms in any base — log₁₀, ln, log₂.
Square Root Calculator
Square roots, cube roots and nth roots.
Quadratic Equation Solver
Solve ax² + bx + c = 0 — roots, vertex, discriminant.
Pythagorean Theorem Calculator
Find a, b or the hypotenuse c in a² + b² = c².
Triangle Calculator
Area and properties of a triangle from three sides.
Circle Calculator
Radius, diameter, circumference and area from any one value.
Slope Calculator
Slope, equation, distance and midpoint between two points.
Distance Calculator
Distance and midpoint between two 2D or 3D points.
Probability & Dice Calculator
Dice/coin probability plus nCr and nPr.
Factorial Calculator
n! for n up to 170.
Statistics Calculator
Full descriptive stats plus z-score for a value.
Half-Life Calculator
Remaining quantity after elapsed time, given a half-life.
Binary Operations Calculator
Binary arithmetic and bitwise ops.
Calculator
Basic arithmetic — add, subtract, multiply, divide, powers and percentages.
Equation Solver
Solve ax + b = c (linear) or ax² + bx + c = 0 (quadratic).
Graphing Calculator
Table of values for y = f(x) — min, max and where it crosses zero.
Calculus Calculator
Numerical derivative f′(x) and definite integral ∫f(x)dx.
Trigonometry Calculator
All six trig functions for an angle, plus arc-functions.
Geometry Calculator
Area and perimeter (or surface area/volume) for common shapes.
Matrix Calculator (2×2)
2×2 matrix ops — determinant, inverse, trace, A×B.
Sequence Calculator
nth term and partial sum for arithmetic or geometric sequences.
Factor Calculator
All factors and prime factorization of an integer.
Complex Number Calculator
Arithmetic on complex numbers a + bi.
Number Tools
Prime check and properties of an integer.
Speed Distance Time Calculator
Solve for speed, distance or time — fill two fields.
Significant Figures Calculator
Count sig figs and round to any precision.
Simplification Calculator
Add, subtract, multiply or divide two fractions.
Percentage Increase Calculator
Change = (new − old) ÷ old × 100. Positive is an increase, negative a decrease.
CGPA to Percentage Calculator
The common rule: % = CGPA × 9.5 (CBSE/Indian boards). For 4.0 scales, % ≈ GPA/4 × 100.
Percentage Change Calculator
Change = (new − old) ÷ old × 100. Positive is an increase, negative a decrease.
Percentage Difference Calculator
Change = (new − old) ÷ old × 100. Positive is an increase, negative a decrease.
Percent Of Calculator
Three modes: X% of Y, percentage change, and what-percent.
Odds Calculator
Enter odds in any format — get the other formats, implied probability and payout.
Betting Calculator
Single/double/treble or each-way — stake × odds → return and profit.
Parlay Calculator
US parlay = UK accumulator — legs multiply. Enter American or decimal odds.
Lucky 15 Calculator
4 selections → 15 bets (4 singles + 6 doubles + 4 trebles + 1 acca). One winner gets money back; all four pays the lot.
Each Way Calculator
An each-way bet is two bets — win at full odds, place at a fraction (usually 1/4 or 1/5).
Matched Betting Calculator
Back at the bookie, lay at the exchange — lock in profit regardless of outcome.
Arbitrage Calculator
When 1/oddsA + 1/oddsB < 1, a guaranteed profit exists — split the stake to collect either way.
Betting Odds Calculator
Enter odds in any format — get the other formats, implied probability and payout.
Bet Calculator
Single/double/treble or each-way — stake × odds → return and profit.
Parlay Odds Calculator
US parlay = UK accumulator — legs multiply. Enter American or decimal odds.
Acca Calculator
Single/double/treble or each-way — stake × odds → return and profit.
Sports Betting Calculator
Single/double/treble or each-way — stake × odds → return and profit.
Matched Bet Calculator
Back at the bookie, lay at the exchange — lock in profit regardless of outcome.
Each Way Bet Calculator
An each-way bet is two bets — win at full odds, place at a fraction (usually 1/4 or 1/5).
Lucky 15 Bet Calculator
4 selections → 15 bets (4 singles + 6 doubles + 4 trebles + 1 acca). One winner gets money back; all four pays the lot.
Surebet Calculator
When 1/oddsA + 1/oddsB < 1, a guaranteed profit exists — split the stake to collect either way.
Roulette Odds Calculator
Enter odds in any format — get the other formats, implied probability and payout.
Free Bet Calculator
Back at the bookie, lay at the exchange — lock in profit regardless of outcome.
Electrical Calculator (Ohm's Law)
V=IR and P=VI — enter any two values.
Density Calculator
Solve ρ = m/V — give any two of density, mass, volume.
LCM & HCF Calculator
GCF and LCM of a list of numbers.
Root Calculator
Square roots, cube roots and nth roots.
Base Converter
Convert between binary, decimal, octal and hex.
Number Converter
Convert between binary, decimal, octal and hex.
Linear Equation Solver
Solve ax + b = c (linear) or ax² + bx + c = 0 (quadratic).
Adding Machine Calculator
Basic arithmetic — add, subtract, multiply, divide, powers and percentages.
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