Day to Century Conversion Calculator: Free Online Tool

Convert days to centuries with our free online time converter.

Day to Century Calculator

Day
Century

How to Use the Calculator:

  1. Enter the value you want to convert in the 'From' field (Day).
  2. The converted value in Century will appear automatically in the 'To' field.
  3. Use the dropdown menus to select different units within the Time category.
  4. Click the swap button (⇌) to reverse the conversion direction.

How to Convert Day to Century

Converting Day to Century involves multiplying the value by a specific conversion factor, as shown in the formula below.

Formula:

1 Day = 2.7379e-5 centuries

Example Calculation:

Convert 60 days: 60 × 2.7379e-5 = 0.00164274 centuries

Disclaimer: For Reference Only

These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.

Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.

What is a Day and a Century?

A day is a unit of time typically defined as 24 hours, which is equivalent to 1,440 minutes or 86,400 seconds. It roughly corresponds to one full rotation of the Earth on its axis relative to the Sun (a solar day).

A century is a unit of time equal to 100 consecutive years. It is widely used for marking long periods, especially in historical contexts and for discussing long-term trends.

Note: The Day is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Century belongs to the imperial/US customary system.

History of the Day and Century

The concept of a day as a fundamental cycle of light and darkness is ancient. The division into 24 hours developed over time, notably influenced by the Egyptians. While the solar day (time between two successive solar noons) varies slightly throughout the year, the standard mean solar day of 86,400 SI seconds is used for civil timekeeping.

The word "century" derives from the Latin "centum," meaning one hundred. In ancient Rome, a centuria was initially a military unit of about 100 soldiers. The application of the term to a period of 100 years became common with the development and standardization of calendar systems, particularly the Julian and Gregorian calendars, used for historical dating.

Common Uses for days and centuries

Explore the typical applications for both Day (imperial/US) and Century (imperial/US) to understand their common contexts.

Common Uses for days

  • Civil Timekeeping: The primary unit for organizing daily life, calendars, schedules, and dates.
  • Astronomy: Used to measure rotational periods of planets and other celestial bodies (though the definition might differ, e.g., sidereal day).
  • Duration: Measuring the length of events, projects, trips, or lifespans that span multiple hours.
  • Biology: Studying circadian rhythms (biological processes that follow a roughly 24-hour cycle).
  • Work & Rest: Structuring periods of work, leisure, and sleep.

Common Uses for centuries

Centuries are primarily used for:

  • Dating historical eras: (e.g., the 18th century refers to the years 1701-1800).
  • Discussing long-term trends: Examining historical, cultural, social, or geological changes spanning multiple generations.
  • Marking centennials: Celebrating significant 100th anniversaries.
  • Grouping years: Organizing timelines in genealogy and long-term planning.

Frequently Asked Questions

Questions About Day (d)

How many hours are in a day?

There are typically 24 hours in a standard civil day.

How many seconds are in a day?

There are 86,400 seconds in a standard 24-hour day (24 hours * 60 minutes/hour * 60 seconds/minute).

Is every day exactly 24 hours long?

The apparent solar day (time from one noon to the next) varies slightly due to the Earth's elliptical orbit and axial tilt. The mean solar day, used for clocks, averages this out to 24 hours. Leap seconds are occasionally added to keep clock time aligned with the Earth's rotation.

What's the difference between a solar day and a sidereal day?

A solar day is based on the Sun's position (approx. 24 hours). A sidereal day is based on the Earth's rotation relative to distant stars (approx. 23 hours, 56 minutes, 4 seconds).

About Century (c)

How many years are in a century?

A century is defined as exactly 100 years.

When did the 21st century begin?

Following the standard definition where centuries start with year '01, the 21st century began on January 1, 2001, and will end on December 31, 2100. This is because the calendar count started with year 1 AD, not year 0.

Is a century a standard unit in science?

While commonly understood, the century is not a base or derived unit within the International System of Units (SI). The SI unit for time is the second. Scientists typically use years (often specified as Julian years for consistency) or multiples like kiloyears (kyr) or megayears (Myr) for very long timescales.

Conversion Table: Day to Century

Day (d)Century (c)
10
50
100
250.001
500.001
1000.003
5000.014
1,0000.027

All Time Conversions

Second to MinuteSecond to HourSecond to DaySecond to WeekSecond to MonthSecond to YearSecond to MillisecondSecond to MicrosecondSecond to NanosecondSecond to DecadeSecond to CenturySecond to MillenniumSecond to FortnightSecond to Planck TimeSecond to ShakeSecond to Sidereal DaySecond to Sidereal YearMinute to SecondMinute to HourMinute to DayMinute to WeekMinute to MonthMinute to YearMinute to MillisecondMinute to MicrosecondMinute to NanosecondMinute to DecadeMinute to CenturyMinute to MillenniumMinute to FortnightMinute to Planck TimeMinute to ShakeMinute to Sidereal DayMinute to Sidereal YearHour to SecondHour to MinuteHour to DayHour to WeekHour to MonthHour to YearHour to MillisecondHour to MicrosecondHour to NanosecondHour to DecadeHour to CenturyHour to MillenniumHour to FortnightHour to Planck TimeHour to ShakeHour to Sidereal DayHour to Sidereal YearDay to SecondDay to MinuteDay to HourDay to WeekDay to MonthDay to YearDay to MillisecondDay to MicrosecondDay to NanosecondDay to DecadeDay to MillenniumDay to FortnightDay to Planck TimeDay to ShakeDay to Sidereal DayDay to Sidereal YearWeek to SecondWeek to MinuteWeek to HourWeek to DayWeek to MonthWeek to YearWeek to MillisecondWeek to MicrosecondWeek to NanosecondWeek to DecadeWeek to CenturyWeek to MillenniumWeek to FortnightWeek to Planck TimeWeek to ShakeWeek to Sidereal DayWeek to Sidereal YearMonth to SecondMonth to MinuteMonth to HourMonth to DayMonth to WeekMonth to YearMonth to MillisecondMonth to MicrosecondMonth to NanosecondMonth to DecadeMonth to CenturyMonth to MillenniumMonth to FortnightMonth to Planck TimeMonth to ShakeMonth to Sidereal DayMonth to Sidereal YearYear to SecondYear to MinuteYear to HourYear to DayYear to WeekYear to MonthYear to MillisecondYear to MicrosecondYear to NanosecondYear to DecadeYear to CenturyYear to MillenniumYear to FortnightYear to Planck TimeYear to ShakeYear to Sidereal DayYear to Sidereal YearMillisecond to SecondMillisecond to Minute