General maths tools are most useful when they are fast, readable, and easy to verify. This category keeps the forms simple and the outputs practical so you can move on quickly.
Use these pages for direct number work: percentages, fractions, roots, sequences, and whole-number checks that often sit inside bigger homework, finance, or engineering tasks.
Start with the guide that gives the clearest method, then move into the live tools once you know which figures matter.
A deeper guide to percentages, percentage of a value, and percentage change, with attention to base values, direction, and why percentage increase and decrease are not perfectly reversible.
Use the guide hub when you need the formula, worked example, or explanation before you run the numbers.
A deeper guide to percentages, percentage of a value, and percentage change, with attention to base values, direction, and why percentage increase and decrease are not perfectly reversible.
A stronger arithmetic guide covering addition, subtraction, multiplication, and division as the foundation for checking formulas, rearranging expressions, and keeping later calculations physically sensible.
A fuller guide to fractions, decimals, and ratios, focused on choosing the most readable form, preserving proportional meaning, and moving cleanly between equivalent representations.
Keep the most useful formulas, examples, and checks available offline with the printable packs for this category.
A fuller printable revision guide for core arithmetic, including estimate-first habits, sign checks, place value, and worked examples that support every other calculator on the site.
A compact but richer percentage, ratio, and proportion sheet that keeps base values, equivalent forms, and proportional reasoning visible.
A more useful quick-reference sheet for arithmetic and geometric sequences and finite sums, with pattern checks and term-versus-sum reminders.
Search within this category to narrow the list quickly, then move between related tools without losing the wider context.
Use the Addition Calculator for a quick addition result with clear inputs and a readable answer.
Use the Subtraction Calculator for a quick subtraction result with clear inputs and a readable answer.
Use the Multiplication Calculator for a quick multiplication result with clear inputs and a readable answer.
Use the Division Calculator for a quick division result with clear inputs and a readable answer.
Use the Percentage of Value Calculator for a quick percentage of value result with clear inputs and a readable answer.
Use the Percentage Change Calculator for a quick percentage change result with clear inputs and a readable answer.
Use the Ratio Simplifier Calculator for a quick ratio simplifier result with clear inputs and a readable answer.
Use the Fraction to Decimal Calculator for a quick fraction to decimal result with clear inputs and a readable answer.
Use the Decimal to Fraction Calculator for a quick decimal to fraction result with clear inputs and a readable answer.
Use the GCD Calculator for a quick gcd result with clear inputs and a readable answer.
Use the LCM Calculator for a quick lcm result with clear inputs and a readable answer.
Use the Prime Number Checker Calculator for a quick prime number checker result with clear inputs and a readable answer.
Use the Factorial Calculator for a quick factorial result with clear inputs and a readable answer.
Use the Square Calculator for a quick square result with clear inputs and a readable answer.
Use the Square Root Calculator for a quick square root result with clear inputs and a readable answer.
Use the Cube Calculator for a quick cube result with clear inputs and a readable answer.
Use the Nth Root Calculator for a quick nth root result with clear inputs and a readable answer.
Use the Arithmetic Sequence nth Term Calculator for a quick arithmetic sequence nth term result with clear inputs and a readable answer.
Use the Arithmetic Series Sum Calculator for a quick arithmetic series sum result with clear inputs and a readable answer.
Use the Geometric Sequence nth Term Calculator for a quick geometric sequence nth term result with clear inputs and a readable answer.
Use the Geometric Series Sum Calculator for a quick geometric series sum result with clear inputs and a readable answer.