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Convert Day (d) to Planck Time (tₚ) instantly.

About these units

Day (d)

A day represents a full rotation of the Earth relative to the Sun, traditionally measured as 24 hours. Although the day is deeply tied to astronomy, its exact length varies due to Earth's gravitational interactions with the Moon, tidal braking, and geophysical processes. The modern civil day uses Coordinated Universal Time (UTC), with occasional leap seconds added to compensate for subtle variations in Earth's rotation. This ensures that civil time remains aligned with the real solar day. Days are fundamental in cultural, religious, biological, and economic cycles. Sleep patterns, work-rest rhythms, calendars, and circadian biology all operate on daily cycles, making the day not just a unit of measurement but a cornerstone of human existence.

Planck Time (tₚ)

Planck time is the smallest meaningful unit of time in known physics, defined as the time it takes light to travel one Planck length. It equals approximately 5.39 × 10⁻⁴⁴ seconds. Below the Planck time, current theories of spacetime—General Relativity and Quantum Mechanics—break down, and we enter a regime where quantum gravity dominates. Planck time defines the theoretical boundary of the earliest moments of the universe, immediately after the Big Bang, before classical spacetime emerged. It is not a unit we can measure directly; rather, it represents a fundamental limit set by nature's constants, including the speed of light, the gravitational constant, and Planck's constant. The Planck time is the frontier where physics transitions from the known into the speculative—where time itself may become granular, discontinuous, or fundamentally different from the human conception.

More Day converters

Day [d] ↔ Second [s]
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Day [d] ↔ Minute [min]
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Day [d] ↔ Hour [h]
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Day [d] ↔ Week [week]
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Day [d] ↔ Month [month]
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Day [d] ↔ Year [y]
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Day [d] ↔ Millisecond [ms]
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Day [d] ↔ Microsecond [µs]
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Day [d] ↔ Nanosecond [ns]
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Day [d] ↔ Picosecond [ps]
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Day [d] ↔ Femtosecond [fs]
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Day [d] ↔ Attosecond [as]
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Day [d] ↔ Decade [decade]
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Day [d] ↔ Century [century]
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Day [d] ↔ Millennium [millennium]
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Day [d] ↔ Shake [shake]
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Day [d] ↔ Planck Time [tₚ]
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Day [d] ↔ Month (Synodic) [month (synodic)]
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Day [d] ↔ Year (Julian) [y (Julian)]
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Day [d] ↔ Year (Leap) [y (leap)]
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Day [d] ↔ Year (Tropical) [y (tropical)]
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Day [d] ↔ Year (Sidereal) [y (sidereal)]
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Day [d] ↔ Day (Sidereal) [d (sidereal)]
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Day [d] ↔ Hour (Sidereal) [h (sidereal)]
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Day [d] ↔ Minute (Sidereal) [min (sidereal)]
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Day [d] ↔ Second (Sidereal) [s (sidereal)]
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Day [d] ↔ Fortnight [fortnight]
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Day [d] ↔ Septennial [7 years]
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Day [d] ↔ Octennial [8 years]
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Day [d] ↔ Novennial [9 years]
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Day [d] ↔ Quinquennial [5 years]
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Day [d] ↔ Quindecennial [15 years]
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Convert Day to Planck Time