Free Online Tools and Educational Resources

This tool helps you determine the correct amount of federal income tax to withhold from your paycheck based on your financial situation and filing status.

This tool can be used to estimate your tax refund or amount due for 2018-2025.

This tool calculates the foreign tax credit limitation, helping individuals and businesses determine the maximum amount of foreign taxes they can claim as a credit against their U.S. tax liability.

This sales tax calculator is a free tool that allows users to easily add sales tax to a price or perform a reverse calculation to find the pre-tax amount from a total.

An easy-to-use GPA calculator for college and high school students. Calculate your cumulative and major GPA on semester or quarter systems, with customizable grade weights.

A free, easy-to-use grade calculator for students. Plan your path to success and understand your current standing in any course.

This tool helps you plan your credit card payments to pay off your balance faster and save on interest.

A finance calculator comparable to Texas Instruments BA II Plus Professional.

This tool helps you determine how much house you can afford based on your income and expenses.

This tool estimates the future growth of a single, lump-sum investment based on a specified annual rate of return.

This tool calculates either your fixed monthly loan payment or the total time it will take to pay off a loan based on a desired payment amount.

This tool estimates your monthly mortgage payment, including principal, interest, property taxes, and homeowner's insurance, and provides a full amortization schedule.

This tool converts your annual salary into an hourly wage, providing a comprehensive breakdown that includes the value of benefits and overtime pay to show your true total compensation.

This tool projects the future value of your savings by combining an initial principal with regular monthly contributions and compound interest over time.

This tool prioritizes debt payoff based on effective interest rates, accounting for tax deductions and IRS limits.

This tool calculates tips and splits restaurant bills for groups, with options to divide the total equally or by individual items.

Stabilize the network by collecting data bits and neutralizing viruses. Use strategy and power-ups to clear the board in this accessible arcade challenge.

Play FreeCell: Enterprise Edition. Master resource allocation, synergy, and project management workflows in this corporate-themed solitaire simulation.

Master risk analysis with Hazard Mitigation Challenge. A free, educational Minesweeper-style game to test your logic, probability, and management skills.

Master the scientific method in Hypothesis: Perish or Publish. Conduct experiments, secure funding, and publish research in this challenging logic puzzle.

This tool helps you test and improve your typing speed and accuracy with a fun, interactive game.

"Play Marketplace Duopoly, a free browser-based strategic business simulation game inspired by Chess. Master economic concepts like duopolies, zero-sum games, and market dominance. Challenge the Corporate AI or compete in local multiplayer mode. No download required.

This simple slot machine game allows you to spin the reels with a single click, providing an entertaining experience with instant results.

This tool calculates your exact age in years, months, and days based on your date of birth, and can also determine the time remaining until your next birthday.

This tool calculates your Body Mass Index (BMI) based on your height and weight, providing insights into your weight category and associated health risks.

This tool calculates the expected value and return on investment of a lottery ticket.

This tool generates random lottery numbers for various popular lottery games, helping you quickly pick your numbers.

This tool handles the fundamental arithmetic operations: addition, subtraction, multiplication, division, and has percentage button.

Instantly analyze your data by uploading a CSV file to automatically calculate key descriptive statistics like mean, median, standard deviation, and more, all securely within your browser.

This tool finds all the factors of a given positive integer using an efficient method, providing a detailed step-by-step explanation of the process.

This tool performs Fisher's Exact Test on a 2x2 contingency table, calculating the exact p-value to assess the significance of the association between two categorical variables, along with a detailed explanation of the results.

This tool performs addition, subtraction, multiplication, and division on fractions, providing a simplified result along with a detailed, step-by-step explanation of the calculation.

This tool finds the greatest common factor (GCF) of two or more integers using the prime factorization method, providing a detailed step-by-step explanation of the process.

This tool solves linear equations step-by-step, including one-variable and two-variable literal isolation with interactive graphing.

This tool calculates the lowest common multiple (LCM) of two or more integers using the prime factorization method, providing a detailed step-by-step explanation of the process.

This tool calculates percentages, percentage increases/decreases, and find the whole from a part.

This tool finds the prime factorization of a given positive integer using an efficient method, providing a detailed step-by-step explanation of the process.

Use our quadratic analysis tool to factor polynomials, solve equations, and graph parabolas.

This tool generates random numbers within a specified range, allowing you to choose the quantity of numbers and the option to sort the results.

This tool converts Arabic numbers (including decimals) to Roman numerals and vice versa, supporting values up to 3,999,999.

This simple and accessible alarm clock displays the current time, allows you to set an alarm for a specific time, and shows a live countdown to completion.

This tool estimates how long it will take to read any text based on its word count and a customizable words per minute (WPM) reading speed.

This tool provides a digital clock displaying the current time and date, along with a stopwatch feature for timing events.

This tool provides a digital clock displaying the current time and date, along with a timer feature for setting countdowns.

This comprehensive tool instantly converts a vast range of measurements across many categories, showing the step-by-step formula for each calculation.