Hour to Planck Time Conversion Calculator: Free Online Tool

Convert hours to Planck times with our free online time converter.

From:

Hour

To:

Planck Time

How to Use the Calculator:

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

How to Convert Hour to Planck Time

Converting Hour to Planck Time involves multiplying the value by a specific conversion factor, as shown in the formula below.

Formula:

1 Hour = 6.6778e+46 Planck times

Example Calculation:

Convert 60 hours: 60 × 6.6778e+46 = 4.0067e+48 Planck times

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 Hour and a Planck Time?

An hour is a unit of time equal to 60 minutes, or 3,600 seconds. It is approximately 1/24th of a mean solar day.

The Planck time (tP) is the unit of time in the system of natural units known as Planck units. It is defined as the time it takes for light to travel a distance of one Planck length in a vacuum, approximately 5.39 × 10⁻⁴⁴ seconds. It represents the timescale below which the known laws of physics, including general relativity and quantum mechanics, are thought to break down.

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

History of the Hour and Planck Time

The concept of dividing the day and night into smaller periods dates back to ancient civilizations. The Egyptians used a system of 12 hours for the daytime and 12 hours for the nighttime (or 10 hours of darkness plus one hour for each twilight period), leading to a 24-hour cycle. The length of these hours varied with the seasons. The fixed-length hour (1/24th of a mean solar day) became more common with the development of mechanical clocks in Europe during the Middle Ages. The Babylonian base-60 system influenced the division of the hour into 60 minutes.

The concept of Planck units, including Planck time, was first proposed by German physicist Max Planck around 1899-1900. He sought to define units based solely on fundamental physical constants, independent of human constructs. Planck time is derived from the speed of light in a vacuum (c), the gravitational constant (G), and the reduced Planck constant (ħ). It represents a fundamental timescale inherent to the universe's properties, particularly where quantum effects of gravity become significant.

Common Uses for hours and Planck times

Explore the typical applications for both Hour (imperial/US) and Planck Time (imperial/US) to understand their common contexts.

Common Uses for hours

Daily Life: Standard unit for structuring the day, work schedules, school periods, sleep duration, and appointments.
Time Zones: The Earth is divided into 24 primary time zones, each roughly corresponding to one hour of the Sun's apparent movement.
Travel: Measuring travel times for longer distances (flights, train journeys, road trips).
Billing: Used for calculating wages (hourly rate), service fees (consulting, labor), and usage charges (parking, rentals).
Media: Length of television programs, movies, podcasts.

Common Uses for Planck times

Planck time is not used for any practical, everyday measurements due to its incredibly small magnitude. Its significance is purely theoretical:

Theoretical Physics: Used as a fundamental unit in theories attempting to unify gravity with quantum mechanics (quantum gravity).
Cosmology: Relevant in describing the very earliest moments of the universe immediately after the Big Bang, known as the Planck epoch, before which current physical theories are inapplicable.
Black Hole Physics: Used in theoretical discussions about the singularity and quantum effects near black holes.
Fundamental Limits: Represents the shortest theoretically meaningful interval of time according to current understanding of physics.

Frequently Asked Questions

Questions About Hour (h)

How many minutes are in an hour?

There are 60 minutes in an hour.

How many seconds are in an hour?

There are 3,600 seconds in an hour (60 minutes/hour * 60 seconds/minute).

Is an hour always the same length?

In modern timekeeping, yes, an hour is fixed at 3,600 seconds. Historically, especially in ancient systems, the length of an hour could vary depending on the season (longer daytime hours in summer, shorter in winter).

How many hours are in a day?

There are 24 hours in a standard day.

About Planck Time (tP)

What is the value of Planck time in seconds?

Planck time (tP) is approximately 5.391 × 10⁻⁴⁴ seconds.

Is Planck time the absolute shortest possible time?

It's considered the shortest meaningful time interval according to current physical theories. Below this scale, the concepts of space and time as we understand them are expected to break down, requiring a theory of quantum gravity for description. It's not necessarily the "shortest possible" time, but rather the limit of our current models.

Can we measure Planck time directly?

No, Planck time is far too short to be measured with any current or foreseeable technology. Its existence and value are derived theoretically from fundamental constants.

Conversion Table: Hour to Planck Time

Hour (h)	Planck Time (tP)
1	66,777,963,272,120,200,000,000,000,000,000,000,000,000,000,000
5	333,889,816,360,601,020,000,000,000,000,000,000,000,000,000,000
10	667,779,632,721,202,040,000,000,000,000,000,000,000,000,000,000
25	1,669,449,081,803,005,200,000,000,000,000,000,000,000,000,000,000
50	3,338,898,163,606,010,400,000,000,000,000,000,000,000,000,000,000
100	6,677,796,327,212,021,000,000,000,000,000,000,000,000,000,000,000
500	33,388,981,636,060,100,000,000,000,000,000,000,000,000,000,000,000
1,000	66,777,963,272,120,200,000,000,000,000,000,000,000,000,000,000,000

All Time Conversions

Second to Minute Second to Hour Second to Day Second to Week Second to Month Second to Year Second to Millisecond Second to Microsecond Second to Nanosecond Second to Decade Second to Century Second to Millennium Second to Fortnight Second to Planck Time Second to Shake Second to Sidereal Day Second to Sidereal Year Minute to Second Minute to Hour Minute to Day Minute to Week Minute to Month Minute to Year Minute to Millisecond Minute to Microsecond Minute to Nanosecond Minute to Decade Minute to Century Minute to Millennium Minute to Fortnight Minute to Planck Time Minute to Shake Minute to Sidereal Day Minute to Sidereal Year Hour to Second Hour to Minute Hour to Day Hour to Week Hour to Month Hour to Year Hour to Millisecond Hour to Microsecond Hour to Nanosecond Hour to Decade Hour to Century Hour to Millennium Hour to Fortnight Hour to Shake Hour to Sidereal Day Hour to Sidereal Year Day to Second Day to Minute Day to Hour Day to Week Day to Month Day to Year Day to Millisecond Day to Microsecond Day to Nanosecond Day to Decade Day to Century Day to Millennium Day to Fortnight Day to Planck Time Day to Shake Day to Sidereal Day Day to Sidereal Year Week to Second Week to Minute Week to Hour Week to Day Week to Month Week to Year Week to Millisecond Week to Microsecond Week to Nanosecond Week to Decade Week to Century Week to Millennium Week to Fortnight Week to Planck Time Week to Shake Week to Sidereal Day Week to Sidereal Year Month to Second Month to Minute Month to Hour Month to Day Month to Week Month to Year Month to Millisecond Month to Microsecond Month to Nanosecond Month to Decade Month to Century Month to Millennium Month to Fortnight Month to Planck Time Month to Shake Month to Sidereal Day Month to Sidereal Year Year to Second Year to Minute Year to Hour Year to Day Year to Week Year to Month Year to Millisecond Year to Microsecond Year to Nanosecond Year to Decade Year to Century Year to Millennium Year to Fortnight Year to Planck Time Year to Shake Year to Sidereal Day Year to Sidereal Year Millisecond to Second Millisecond to Minute