How to use the Basic Calculator
Learn the keypad, keyboard shortcuts, percent button, copy result action, and calculation history using the Access Free Tools calculator.
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Real guides for tools that are available on Access Free Tools.
How to use the Percentage Calculator
Learn how to find percent of a number, what percent one number is of another, percentage change, discounts, markups, and reverse percentages.
Read guideHow to use the Ratio Calculator
Learn how to simplify ratios, make equivalent ratios, split totals by ratio parts, handle decimals, and check proportions.
Read guideHow to use the Percent Error Calculator
Learn how to compare measured and accepted values, calculate percent error, read signed percent error, and avoid common lab-report mistakes.
Read guideHow to use the Half-Life Calculator
Learn how to calculate remaining amount, elapsed time, and half-life with decay formulas, matching units, examples, and privacy notes.
Read guideHow to use the Exponent Calculator
Learn how to calculate powers, negative exponents, zero exponents, fraction exponents, scientific notation, and common exponent mistakes.
Read guideHow to use the Log Calculator
Learn how to calculate logarithms with custom bases, use ln and log10, read change-of-base steps, and check answers with exponents.
Read guideHow to use the Root Calculator
Learn how to calculate square roots, cube roots, nth roots, exponent form, negative radicands, and real-number root checks.
Read guideHow to use the Quadratic Formula Calculator
Learn how to solve ax^2 + bx + c = 0, read the discriminant, find real or complex roots, and use vertex details.
Read guideHow to use the Binary Calculator
Learn how to add, subtract, multiply, divide, and convert binary numbers with base-2 place values, decimal checks, and remainders.
Read guideHow to use the Hex Calculator
Learn how to add, subtract, multiply, divide, and convert hexadecimal numbers with base-16 digits, decimal checks, binary output, and remainders.
Read guideHow to use the Kawaii Calculator
Learn when to use the cute pastel calculator, how its buttons and shortcuts work, and how to keep recent calculations private in the browser.
Read guideHow to use the Scientific Calculator
Learn DEG/RAD mode, typed expressions, trig functions, logs, roots, powers, constants, history, and when this tool is useful.
Read guideHow to use the Fraction Calculator
Learn how to add, subtract, multiply, divide, simplify, and convert fractions and mixed numbers with the Fraction Calculator.
Read guideHow to use the Random Number Generator
Learn how to pick one random number, generate lists, use unique results, exclude numbers, sort results, copy answers, and understand everyday-use limits.
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