Popular tools

Calculate compound interest and final 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.

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

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.

Add, subtract, multiply, or divide fractions.

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

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

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.

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 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.

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

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

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

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

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

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