Time Converter

Convert between nanoseconds, milliseconds, seconds, minutes, hours, days, weeks, months, years, decades, and centuries.

Value

From

Common Time Conversions

From	To	Result
1 Minute	Seconds	60 s
1 Hour	Minutes	60 min
1 Hour	Seconds	3,600 s
1 Day	Hours	24 hr
1 Week	Days	7 days
1 Year	Days	365.25 days
1 Year	Seconds	31,557,600 s
1 Century	Years	100 years

Frequently Asked Questions

A Julian year (used in astronomy) is exactly 31,557,600 seconds = 365.25 days × 24 hr × 3600 s. A calendar year has 365 days = 31,536,000 s, or 366 days in a leap year = 31,622,400 s. This converter uses the Julian year for consistency.

An average month is 365.25/12 = 30.4375 days = 2,629,800 seconds. Individual months range from 28 to 31 days. This converter uses the average month value for general purpose conversions rather than a specific calendar month.

A nanosecond is one billionth of a second (10⁻⁹ s). It is commonly used in computing — for example, RAM access times are measured in nanoseconds, and modern CPUs execute billions of clock cycles per second. Light travels about 30 cm in one nanosecond.

A calendar year has 52 weeks plus 1 day (or 2 days in a leap year), totaling 52.18 weeks on average. A Julian year = 365.25 days / 7 = 52.1786 weeks. ISO 8601 defines the week numbering system where some years can have 53 ISO weeks.

How It Works

Enter Time Value

Type any time value from nanoseconds to centuries. Conversions use the second as the SI base unit.

Choose Time Units

Select from 12 time units spanning from nanoseconds to centuries. Average values are used for months and years.

Instant Conversion

Results are shown in real time. Swap the direction instantly with the swap button.

Common Use Cases

Software Development

Convert between milliseconds, seconds, and hours for API timeouts, cache expiry, job scheduling, and performance benchmarks.

Project Planning

Convert project durations between days, weeks, and months for sprint planning, deadline calculations, and milestone tracking.

Computing & Hardware

Convert CPU cycles, memory latencies, and network round-trip times between nanoseconds, microseconds, and milliseconds.

Sports Timing

Convert race times and athletic records between milliseconds, seconds, minutes, and hours for comparison across different events.

Science & Research

Convert time intervals for physics experiments, chemistry reactions, and astronomical observations across different time scales.

Finance & Contracts

Convert contract durations and financial periods between days, months, and years for loan calculations, lease terms, and interest periods.

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