All-in-one online tools

Calculate compound interest and final amount.

Calculate simple interest on a principal amount.

Work out the sale price after a percentage discount.

Calculate how much to tip based on the bill and percentage.

Calculate EMI, monthly payments, and total interest with full amortization schedule for any loan.

Estimate monthly mortgage payments, total interest, and amortization for home loans.

Calculate return on investment (ROI) as a percentage from gain and cost.

Estimate federal income tax with simplified brackets. Adjustable for different tax years.

Convert between annual salary and hourly wage. Handles full-time and part-time hours.

See how inflation affects purchasing power over time. Compare past and future values.

Project retirement nest egg with contributions, growth rate, and years to retirement.

Find break-even point from fixed costs, variable costs, and selling price per unit.

Calculate gross, operating, and net profit margin from revenue and costs.

Convert between 30+ currencies using live exchange rates. Free, no sign-up required.

Add or subtract a percentage from any number, or find what percentage one number is of another.

Convert percentages to decimals or fractions.

Add, subtract, multiply, or divide fractions.

Convert a fraction to its decimal equivalent.

Convert a decimal number to a simplified fraction.

Calculate the mean (average) of a set of numbers.

Find the median (middle value) of a set of numbers.

Calculate standard deviation for a set of numbers.

Calculate the square root of any number.

Calculate base raised to a power.

Calculate the remainder of a division.

Calculate the factorial of a number (n!).

Calculate GPA from letter grades and credit hours. Uses standard 4.0 scale. Free for students.

Calculate weighted average grade from assignments and their weights. Free online grade calculator.

Convert percentage grade to letter grade (A, B, C, D, F). Uses common US scale.

Generate book citations in APA, MLA, or Chicago format. Free citation generator for essays and papers.

Count words, characters, and paragraphs in your text. Includes reading time. Free online word counter.

Count characters with or without spaces. Check Twitter (280), meta descriptions (~155), and form limits. Free online character counter.

Count paragraphs in your text. Useful for essays, blog posts, and document structure. Free online paragraph counter.

Estimate how long it takes to read your text. Set WPM for X min read. Free for bloggers and writers.

Calculate your body mass index from height and weight.

Calculate your age in years from birth date.

Calculate the difference between two dates in days, weeks, months, years.

Convert between seconds, minutes, hours, and days.

Convert time between different time zones.

Convert military time (24-hour) to standard time (12-hour AM/PM) and vice versa. Free military time converter chart. Instant conversion for 1430, 2:30 pm, and more.

Convert between metres, kilometres, miles, feet, inches, and more.

Convert between kilograms, pounds, ounces, and grams.

Convert between Celsius, Fahrenheit, and Kelvin.

Convert between square metres, square feet, acres, hectares, and more.

Convert between litres, gallons, cubic feet, and more.

Convert between km/h, mph, m/s, knots, and more.

Convert numbers between binary, decimal, and hexadecimal.

Convert between Roman numerals and decimal numbers.

Convert text to uppercase, lowercase, title case, or sentence case.

Convert between JSON and XML formats.

Convert Markdown to HTML.

Format, minify, and validate JSON. Pretty-print with indent, compact for APIs. Free online JSON formatter and validator.

Format, minify, and validate XML. Pretty-print and check well-formedness. Free online XML formatter and validator.

Convert CSV to JSON or JSON to CSV. Handles headers, arrays, and nested data. Free online CSV JSON converter.

Encode text to Base64 or decode Base64 to text. Useful for data encoding, APIs, and file transfers. Free online Base64 encoder decoder.

Encode URLs or decode URL-encoded strings. Handles special characters and spaces. Free online URL encoder decoder.

Generate random UUIDs (v4). Unique identifiers for databases, APIs, and distributed systems. Free UUID generator.

Generate random numbers between a minimum and maximum. Choose integer or decimal. Free random number generator.

Generate strong, random passwords with uppercase, lowercase, numbers, and symbols. Secure, free, no signup.

Convert moles, molarity, concentration, and other science units. Free online unit converter for chemistry and physics.

Convert images between PNG, JPEG, and WebP formats. Free online image converter. No upload to server—runs in browser.

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text. Free online hash generator for checksums and passwords.

Compare two texts side by side. See added, removed, and changed lines. Free online diff checker for code and documents.

Test regular expressions against sample text. See matches, groups, and replace results. Free online regex tester for developers.

Pomodoro timer with 25-minute focus sessions and 5-minute breaks. Boost productivity with the Pomodoro technique. Free online timer.

Set a custom countdown timer in hours, minutes, and seconds. Get notified when time is up. Free online countdown timer.

Digital stopwatch with lap times. Measure elapsed time for workouts, races, and tasks. Free online stopwatch.

Generate Lorem Ipsum placeholder text by paragraphs, words, or bytes. Free Lorem Ipsum generator for designers and developers.

Generate QR codes from URLs or text. Download as PNG or SVG. Free online QR code generator. No signup required.

Build cron expressions for Linux, cron jobs, and schedulers. Visual schedule builder for minute, hour, day, month, weekday.