Math
Solve calculations and double-check numbers for study, reporting, and planning
Interactive calculators for algebra, matrices, percentages, statistics, and general arithmetic when you need transparent results.
Choose this hub for quick calculation work that benefits from visible formulas, repeatable inputs, or a lightweight browser tool instead of a full spreadsheet or CAS.
Tools in this hub
Featured picks
Language support
Common tasks
Handle percentage and ratio checks
Estimate increases, decreases, and proportional changes for pricing, reports, or daily business math.
Work through algebra and matrix problems
Solve equations and matrix operations when you need fast feedback during study or technical work.
Summarize numerical samples
Use descriptive statistics to sanity-check datasets before you document or present them.
Featured tools
Start with the registered tools that cover the most common jobs in this workflow, then browse the full list.
Percentage Calculator
Free online percentage calculator. Compute X% of Y, find what percent X is of Y, calculate percentage change, and increase or decrease values by a percentage.
Statistics Calculator
Calculate count, sum, mean, median, min, max, variance, and standard deviation from numeric datasets.
Matrix Calculator
Calculate matrix transpose, determinant, row and column sizes from rectangular, finite-number matrices.
Math Evaluator
Evaluate arithmetic expressions with correct operator precedence and a fixed set of math functions, parsed in the page rather than executed as code.
All tools in this category
Browse every registered tool in this category and keep moving through the real task at hand.
Compound Interest Calculator with Yearly Growth Projection
Estimate compound growth from an initial balance, recurring contributions, contribution timing, compounding frequency, rate, and years with a yearly projection table.
Loan Amortization Calculator & Extra Payment Schedule
Calculate fixed-rate loan payments, total interest, a full amortization schedule, and the payoff impact of recurring extra monthly principal.
Savings Goal Calculator for Monthly Contribution or Time to Goal
Set a savings target, current balance, and APY, then solve for the missing monthly contribution or the estimated time needed to reach the goal.
Paycheck Estimator for Salary, Hourly Pay, Taxes, and Deductions
Estimate gross-to-net pay from salary or hours, overtime, pre-tax deductions, entered tax rates, and post-tax deductions. Results are not official payroll advice.
Mortgage Comparison Calculator for Monthly and Lifetime Cost
Compare two mortgage scenarios side by side, including loan amount, rate, term, fees, taxes, insurance, monthly payment, and lifetime cost differences.
VAT & GST Calculator for Tax-Inclusive or Tax-Exclusive Prices
Add or extract VAT or GST, compare multiple tax rates at once, and review net, tax, and gross amounts without jurisdiction-specific legal claims.
APR Fee Calculator for Loan Origination and Recurring Charges
Estimate how upfront and recurring loan fees change the effective APR, monthly cost, and net funds received. Results are clearly labeled as estimates.
Statistics Calculator
Calculate count, sum, mean, median, min, max, variance, and standard deviation from numeric datasets.
Matrix Calculator
Calculate matrix transpose, determinant, row and column sizes from rectangular, finite-number matrices.
Quadratic Equation Solver
Solve ax² + bx + c quadratic equations, calculate discriminants, and return real or complex roots.
Prime Factorization Calculator
Factor integers into primes for number theory, coding challenges, cryptography learning, and math homework checks.
Math Evaluator
Evaluate arithmetic expressions with correct operator precedence and a fixed set of math functions, parsed in the page rather than executed as code.
Percentage Calculator
Free online percentage calculator. Compute X% of Y, find what percent X is of Y, calculate percentage change, and increase or decrease values by a percentage.
Related categories and collections
Continue with adjacent category pages and task collections that solve the next step.
Measurement
Practical measurement helpers for unit conversion, print resolution, aspect ratios, transfer speeds, timers, and ETA planning.
Data formats
Structured data tools for JSON formatting, YAML and XML conversion, schema validation, CSV editing, and API-ready output.
Development
Everyday helpers for regex testing, diffs, cron expressions, Docker snippets, Markdown cleanup, and other build-and-debug chores.
Finance calculators
Use practical finance tools for amortization, mortgage comparison, APR estimates, savings plans, VAT or GST math, and generic paycheck take-home planning.
Education & study
A mixed collection for homework, revision, classroom examples, notes, and self-checks across math, statistics, Markdown, and text-focused practice.