Time tools

Convert Unix timestamps, calculate the difference between dates, and translate ISO 8601 durations. Works with seconds or milliseconds, any time zone. Everything runs in your browser — nothing is uploaded.

• Date CalculatorCount days between two dates, or add and subtract days, months or business days.
• ISO 8601 DurationConvert ISO 8601 durations like P1DT2H30M to seconds and readable text, and back.
• Unix Timestamp ConverterConvert Unix time in seconds or milliseconds to a date and back, in any time zone.