Calculators & Converters
22 toolsUnits, percentages, dates, timezones — quick conversions without the math.
Password Generator
Generate strong, secure random passwords with customizable length and character types.
CalcPassword Strength Checker
Check password strength instantly with entropy analysis, crack time estimate, and detailed criteria breakdown.
CalcUnit Converter
Convert between different units of length, weight, temperature, and more.
CalcPercentage Calculator
Calculate percentages easily: what percent is X of Y, X% of Y, and percentage change.
CalcTimezone Converter
Convert time between any two time zones. See world clocks for major cities instantly.
CalcInvoice Generator
Create professional invoices in seconds. Free, no signup required.
CalcDate Formatter & Calculator
Convert dates between ISO 8601, Unix timestamps, and other formats. Calculate date differences easily.
CalcAspect Ratio Calculator
Calculate and convert aspect ratios for images, videos, and screens. Lock width or height to scale proportionally.
CalcPomodoro Timer
A customizable Pomodoro productivity timer with work sessions, short breaks, long breaks, and session tracking.
CalcRandom Number Generator
Generate cryptographically secure random numbers. Supports custom ranges, dice rolls, and coin flips.
CalcByte / Data Size Converter
Convert between bytes, KB, MB, GB, TB, and PB instantly. Supports both decimal (SI) and binary (IEC) systems.
Calcroman-numeral
Convert between Arabic numbers and Roman numerals instantly. Supports numbers 1 to 3999.
CalcCountdown Timer
A simple, customizable countdown timer. Set hours, minutes, and seconds, then start counting down with an audio alert when time is up.
CalcNumber to Words
Convert any number into English words. Supports cardinal numbers, ordinal numbers, and currency amounts in multiple currencies.
CalcAge Calculator
Calculate your exact age in years, months, and days from your date of birth. Find total days lived and days until your next birthday.
CalcStatistics Calculator
Calculate mean, median, mode, standard deviation, variance, quartiles, and more from any list of numbers. Supports comma, space, or newline-separated input.
CalcBMI Calculator
Calculate your Body Mass Index (BMI) with metric or imperial units. Instantly see your BMI category and ideal weight range for your height.
CalcLoan Calculator
Calculate monthly loan payments, total interest, and see a full amortization breakdown for any mortgage, car loan, or personal loan.
CalcTip Calculator
Calculate the tip and split the bill instantly. Choose a preset tip percentage or enter a custom amount, and see exactly how much each person owes.
CalcDate Difference Calculator
Calculate the exact difference between two dates in years, months, weeks, days, hours, minutes, and seconds.
CalcStopwatch
A precise stopwatch with lap tracking. Start, stop, and record laps — see best and worst lap times highlighted automatically.
CalcPace Calculator
Solve for running pace, finish time, or distance from any two known values. Works in km or miles with km/h and mph speed conversions and split times for 5K/10K/half/marathon.
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