From percentages and fractions to roots and averages, these calculators give instant, step-by-step answers for homework, exams and everyday sums. No app to install — just type and see the result. The first live calculator is the Percentage Calculator, with three modes: a percentage of a number, what percentage one number is of another, and percentage increase or decrease — each showing the working so you can follow the maths. Later batches add fraction and decimal calculators, averages, ratios, square roots, powers, logarithms, area and volume calculators and a scientific calculator, all with the same step-by-step style. Because they run in your browser, they work offline after the first load, which makes them handy in exams revision, in the classroom, and in shops and markets where the signal is weak. Every result is free, with no account and no ads inside the calculator. Teachers and students can use them to check homework, and shopkeepers can use them to work out discounts and change without reaching for a calculator app.

1 tool live now. Use one below — the rest of this category arrives in later batches.

Live tools

• Percentage Calculator

  Percentage Calculator with step-by-step working.

  Open tool →

Tools planned for this category

• 3D Surface Plotter

  3D Surface Plotter with step-by-step working.

• Algebra Simplifier

  Algebra Simplifier with step-by-step working.

• Arc Length Calculator

  Arc Length Calculator with step-by-step working.

• Arithmetic Sequence Calculator

  Arithmetic Sequence Calculator with step-by-step working.

• Average Calculator

  Average Calculator with step-by-step working.

• Basic Calculator

  Basic Calculator with step-by-step working.

• Circle Equation Calculator

  Circle Equation Calculator with step-by-step working.

• Combination Calculator (nCr)

  Combination Calculator (nCr) with step-by-step working.

• Complex Number Calculator

  Complex Number Calculator with step-by-step working.

• Cubic Equation Solver

  Cubic Equation Solver with step-by-step working.

• Decimal to Fraction

  Decimal to Fraction with step-by-step working.

• Derivative Calculator

  Derivative Calculator with step-by-step working.

• Distance Between Two Points

  Distance Between Two Points with step-by-step working.

• Divisibility Checker

  Divisibility Checker with step-by-step working.

• Dot & Cross Product Calculator

  Dot & Cross Product Calculator with step-by-step working.

• Exponent Calculator

  Exponent Calculator with step-by-step working.

• Factorial Calculator

  Factorial Calculator with step-by-step working.

• Factors Finder

  Factors Finder with step-by-step working.

• Fibonacci Generator

  Fibonacci Generator with step-by-step working.

• Fraction Calculator

  Fraction Calculator with step-by-step working.

• Fraction Simplifier

  Fraction Simplifier with step-by-step working.

• Fraction to Decimal

  Fraction to Decimal with step-by-step working.

• Function Plotter (2D)

  Function Plotter (2D) with step-by-step working.

• GCD / HCF Calculator

  GCD / HCF Calculator with step-by-step working.

• Geometric Sequence Calculator

  Geometric Sequence Calculator with step-by-step working.

• Graphing Calculator

  Graphing Calculator with step-by-step working.

• Inequality Solver

  Inequality Solver with step-by-step working.

• Integral Calculator

  Integral Calculator with step-by-step working.

• Law of Cosines Calculator

  Law of Cosines Calculator with step-by-step working.

• Law of Sines Calculator

  Law of Sines Calculator with step-by-step working.

• LCM Calculator

  LCM Calculator with step-by-step working.

• Limit Calculator

  Limit Calculator with step-by-step working.

• Line Equation from Two Points

  Line Equation from Two Points with step-by-step working.

• Linear Equation Solver

  Linear Equation Solver with step-by-step working.

• Logarithm Calculator

  Logarithm Calculator with step-by-step working.

• Long Division Calculator (Steps)

  Long Division Calculator (Steps) with step-by-step working.

• Long Multiplication (Steps)

  Long Multiplication (Steps) with step-by-step working.

• Matrix Calculator

  Matrix Calculator with step-by-step working.

• Matrix Determinant Calculator

  Matrix Determinant Calculator with step-by-step working.

• Matrix Inverse Calculator

  Matrix Inverse Calculator with step-by-step working.

• Matrix Multiplication Calculator

  Matrix Multiplication Calculator with step-by-step working.

• Midpoint Calculator

  Midpoint Calculator with step-by-step working.

• Mixed Number Calculator

  Mixed Number Calculator with step-by-step working.

• Modulo Calculator

  Modulo Calculator with step-by-step working.

• Multiplication Table Generator

  Multiplication Table Generator with step-by-step working.

• Nth Root Calculator

  Nth Root Calculator with step-by-step working.

• Number to Words Converter

  Number to Words Converter with step-by-step working.

• Percent Error Calculator

  Percent Error Calculator with step-by-step working.

• Percentage Difference Calculator

  Percentage Difference Calculator with step-by-step working.

• Percentage Increase/Decrease Calculator

  Percentage Increase/Decrease Calculator with step-by-step working.

• Permutation Calculator (nPr)

  Permutation Calculator (nPr) with step-by-step working.

• Polynomial Calculator

  Polynomial Calculator with step-by-step working.

• Prime Factorization Calculator

  Prime Factorization Calculator with step-by-step working.

• Prime Number Checker

  Prime Number Checker with step-by-step working.

• Prime Numbers List Generator

  Prime Numbers List Generator with step-by-step working.

• Proportion Solver

  Proportion Solver with step-by-step working.

• Pythagorean Theorem Calculator

  Pythagorean Theorem Calculator with step-by-step working.

• Quadratic Equation Solver

  Quadratic Equation Solver with step-by-step working.

• Ratio Calculator

  Ratio Calculator with step-by-step working.

• Right Triangle Solver

  Right Triangle Solver with step-by-step working.

• Roman Numeral Converter

  Roman Numeral Converter with step-by-step working.

• Rounding Calculator

  Rounding Calculator with step-by-step working.

• Scientific Calculator

  Scientific Calculator with step-by-step working.

• Scientific Notation Converter

  Scientific Notation Converter with step-by-step working.

• Significant Figures Calculator

  Significant Figures Calculator with step-by-step working.

• Slope Calculator

  Slope Calculator with step-by-step working.

• Square Root Calculator

  Square Root Calculator with step-by-step working.

• System of Equations Solver

  System of Equations Solver with step-by-step working.

• Triangle Solver (SSS/SAS/ASA)

  Triangle Solver (SSS/SAS/ASA) with step-by-step working.

• Trigonometry Calculator

  Trigonometry Calculator with step-by-step working.

• Vector Calculator

  Vector Calculator with step-by-step working.

• Weighted Average Calculator

  Weighted Average Calculator with step-by-step working.

About this category

When will these tools be ready to use?

Tools are published in batches, starting with the 40 highest-value tools in Phase 1. Each tool goes live only when it is fully working, tested on mobile, and has its own written guide.

Will my files be uploaded when I use a tool?

No. Every Toolsvine tool runs 100% in your browser. Files, text and images you use in a tool never leave your device.