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Calculate the exact number of days, weeks, months, and years between any two dates. Includes business days, weekend days, total hours, minutes, and seconds. Perfect for project planning, legal deadlines, event countdowns, age calculations, and contract periods.
Convert any date and time across 50+ world time zones instantly. Automatically handles UTC offsets, Daylight Saving Time (DST), and fractional offsets like UTC+5:30. Perfect for scheduling international meetings, coordinating remote teams, planning travel, and tracking global market hours.
Calculate the duration between two times, add multiple time spans, or subtract durations. Handles overnight shifts with auto midnight-crossing detection, converts results to decimal hours for payroll, and supports unlimited duration entries. Perfect for tracking work hours, exercise sessions, project tasks, and billing.
Find the exact age gap between two people in years, months, and days. Calculates individual ages, zodiac signs, Chinese zodiac, birth generation, days until next birthday, combined ages, and the relative percentage by which one person is older. Perfect for couples, siblings, parent-child comparisons, and celebrity age gap curiosity.
Calculate your weekly work hours with automatic overtime detection, break deductions, and pay estimates. Enter start/end times and breaks for each day of the week, set your hourly rate and overtime multiplier, and get a full day-by-day breakdown with regular hours, overtime hours, and gross pay. Handles overnight shifts, compressed workweeks, and both daily and weekly overtime thresholds.
Format, validate, minify, or sort JSON data with configurable indentation. Instantly check for syntax errors, view node count and nesting depth — free, no sign-up required.
Generate QR codes for URLs, text, Wi-Fi credentials, vCards, and more. Customise foreground and background colour, error correction level, margin, and download as SVG or PNG — free and instant.
Calculate your Body Mass Index, healthy weight range and ideal weight using metric or imperial units.
Estimate daily calorie needs based on age, gender, height, weight and activity level using Mifflin-St Jeor, Harris-Benedict or Katch-McArdle formulas.