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.

Convert Unix timestamps to human-readable dates and vice versa. Current timestamp, batch conversion, and multiple formats supported.

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.

Convert numbers to Roman numerals and Roman numerals to numbers instantly. Free online Roman numeral converter with validation.

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

Free online stopwatch and countdown timer with lap tracking. Precision timing in your browser — no app needed.

Validate credit card numbers using the Luhn algorithm. Identify card type (Visa, Mastercard, Amex) and check number validity.

Convert numbers between hexadecimal, decimal, octal, and binary instantly. Auto-detects input format with 0x, 0b, 0o prefixes.

Calculate your daily calorie requirements and target macronutrient distribution (protein, fats, carbs) based on your fitness goals and BMR. Free and interactive.

Calculate recommended daily allowances (RDAs) for key vitamins and minerals based on age, gender, and life stage. Check food sources.

Track your weekly training volume per muscle group. Calculate sets, reps, total volume load, and evaluate training against hypertrophy guidelines.