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Free Math & Engineering Tools
Solve matrices, equations, vectors, probability, complex numbers, Ohm's law, and resistor codes.
Math and engineering tools should show enough working for you to trust the result. This category solves linear systems, matrix operations, vectors, probability, complex numbers, binary arithmetic, Ohm's law, and resistor colour codes. Review the formulas and intermediate values, especially before using a result in an exam or engineering design.
Matrix Calculator
Add, subtract, multiply, transpose, and find determinants.
Open toolLinear Equation Solver
Solve two or three simultaneous linear equations.
Open toolLogarithm Calculator
Calculate logarithms with any base and show the steps.
Open toolPermutation & Combination Calculator
Calculate nPr and nCr with and without repetition.
Open toolProbability Calculator
Calculate single and combined event probabilities.
Open toolVector Calculator
Add vectors and calculate dot products, cross products, and angles.
Open toolComplex Number Calculator
Add, subtract, multiply, divide, and convert complex numbers.
Open toolBinary Arithmetic Calculator
Add, subtract, multiply, and divide binary numbers.
Open toolOhm's Law Calculator
Calculate voltage, current, resistance, and power.
Open toolResistor Color Code Decoder
Decode 4, 5, and 6-band resistor values and tolerances.
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