Calculators & Converters

Calculate your exact age in years, months, and days from your date of birth. Free online age calculator — instant results in your browser.

Calculate your Body Mass Index (BMI) instantly. Supports metric and imperial units. Free online BMI calculator — no signup required.

Calculate monthly EMI, total interest, and total payment for any loan. Free online loan calculator with amortization breakdown.

Calculate percentages, percentage increase/decrease, and what percentage one number is of another. Free online percentage calculator.

Unix Timestamp Converter — Convert between Unix timestamps and human-readable dates instantly. See the current epoch time and convert any timestamp to a...

Convert temperatures between Celsius, Fahrenheit, and Kelvin instantly. Free online temperature converter — no signup required.

Convert any number to words instantly. Supports large numbers up to trillions. Free online number to words converter.

Roman Numerals Converter — Convert between numbers and Roman numerals instantly. Enter a number (1-3999) or a Roman numeral to see the conversion.

Format numbers with commas, decimals, currency symbols, and more. Free online number formatter with multiple locale support.

Stopwatch & Timer — Use a precision stopwatch with lap tracking or set a countdown timer — all in your browser with no downloads needed.

Credit Card Validator — Validate credit card numbers using the Luhn algorithm. Identify the card type (Visa, Mastercard, Amex, Discover) and check if th...

Hex Converter — Convert numbers between hexadecimal, decimal, octal, and binary formats. Enter a value in any base and see all conversions instantly.

Food Macros Calculator — Determine your optimal daily calorie requirements and macronutrient breakdown for fat loss, maintenance, or muscle gain.

Micros & Vitamins Calculator — Check recommended daily allowances (RDAs) for major vitamins and minerals tailored to your age, biological gender, and li...

Training Volume Calculator — Log your exercises and sets to calculate your weekly workout volume load per muscle group and compare it against muscle-bui...

Free online scientific calculator with sin, cos, tan, log, factorial, powers, and parentheses. Supports degrees/radians and keyboard input.

Calculate the exact difference between two dates in years, months, days, total weeks, and hours. Optional end-day inclusion and weekday count.

Calculate compound interest with optional monthly contributions. See final balance, total interest, and a year-by-year breakdown table instantly.

Calculate your cumulative GPA on the 4.0 scale. Add courses with grade and credit hours, remove rows, and see your GPA update live.

Display live current time in multiple time zones at once. Add any IANA time zone, see local time, date, and UTC offset updated every second.

Count down to a specific date and time or run a simple H:M:S duration timer. Optional beep and browser notification when time runs out.

A configurable Pomodoro productivity timer with work, short break, and long break phases. Progress ring, beep alerts, and round tracking included.

Free discount calculator. Enter a price and percent off to instantly see how much you save and the final sale price. Works fully in your browser.

Free profit margin calculator. Enter cost and selling price to get profit, profit margin %, and markup %. Instant, private, runs in your browser.

Free sales tax / VAT calculator. Add tax to a net price or extract tax from a tax-inclusive total. Shows net, tax amount, and gross. Runs in your browser.

Calculate PayPal fees and the amount you receive, or gross-up to receive an exact net. Editable percent + fixed fee. Private, runs in your browser.

Free average calculator. Paste numbers to get the mean, median, mode, sum, min, max, and range instantly. No upload — runs entirely in your browser.

Calculate tips and split bills instantly in your browser. Free, no sign-up—just enter the amount, tip %, and number of people.

Calculate your monthly loan EMI, total interest, and total repayment right in your browser. Free, no sign-up required.

Split any group bill fairly in your browser—add tax, tip, and divide among any number of people. Free, no sign-up needed.

Get ISO week number for any date. Week start/end, Hijri date beside Gregorian, day of year, mini calendar. Monday, Sunday, or Saturday week starts.

Calculate GLP-1 medication doses — click calculator for Mounjaro, Ozempic, Wegovy. Micro-dose and titration plans. Consult your doctor.

Free online timezone meeting planner. No signup, no upload — works entirely in your browser. Fast, private, and free forever.