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Time Duration Formatter

Desarrollador

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APORTE

PROD.

Lado cliente

Verbose

Corto

ISO 8601

Reloj

Approximate

Milisegundos

Total Seconds

Unidad	Valor
Años	0
Días	0
Horas	0
Minutos	0
Segundos	0
Milisegundos	0

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Guía

Time Duration Formatter

Convert any duration — entered in seconds, milliseconds, or clock format — into multiple human-readable representations simultaneously. See verbose, short, ISO 8601, clock, and approximate formats side by side, with a full breakdown by time unit.

Cómo utilizar

Select your input mode (Seconds, Milliseconds, or Clock hh:mm:ss), enter your duration value, and click Formato. The tool instantly displays the duration in all supported formats — from verbose natural language to ISO 8601 standard notation.

Características

Multiple Input Modes – Enter duration as total seconds, milliseconds, or clock format (hh:mm:ss or hh:mm:ss.mmm)
Verbose Format – “2 days, 3 hours, 4 minutes, 5 seconds” with zero units omitted
Short Format – Compact “2d 3h 4m 5s” notation for display or code
ISO 8601 Duration – Standard “P2DT3H4M5S” format used in APIs and data interchange
Clock Format – “51:04:05” with total hours (not reset to days)
Approximate – Natural language approximation: “about 2 days” or “less than a minute”
Year Support – Correctly handles very long durations with year decomposition
Negative Durations – Supports negative values for countdown or elapsed-time calculations

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 Preguntas frecuentes

What is ISO 8601 duration format?

ISO 8601 is an international standard for representing dates and times. The duration format uses the pattern P[n]Y[n]M[n]DT[n]H[n]M[n]S, where P is the duration designator, T separates date and time components, and each number is followed by its unit letter (Y=years, M=months, D=days, H=hours, M=minutes, S=seconds). For example, P2DT3H4M5S means 2 days, 3 hours, 4 minutes, and 5 seconds. This format is used in APIs, calendar applications, and data interchange formats like XML and JSON Schema.
Why does the clock format show more than 24 hours?

The clock format (e.g., 51:04:05) displays the total number of hours rather than resetting to days. This is intentional and useful for contexts like video duration, elapsed time counters, or any situation where you want a single continuous clock-style reading. A duration of 2 days, 3 hours, 4 minutes, and 5 seconds has a total of 51 hours (2×24 + 3), shown as 51:04:05. If you need day-separated display, use the verbose or short format instead.
What's the fastest way to convert seconds to hours and minutes?

The standard formula is: hours = Math.floor(seconds / 3600), then minutes = Math.floor((seconds % 3600) / 60), then remaining_seconds = seconds % 60. For days, add days = Math.floor(seconds / 86400) before calculating hours using the remainder. This tool does all these calculations automatically and displays the decomposition across all standard time units simultaneously, so you never need to do the arithmetic manually.