Calculators & Converters
13 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.
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