Days to Nanoseconds Converter
Enter the time in days below to convert it to nanoseconds.
Convert Days to Nanoseconds
Enter a value in days (d) to convert to nanoseconds (ns).
Day to Nanosecond Conversion Table
Table showing various day measurements converted to nanoseconds. Click any preset value or arrow to load it into the converter.
| Days (d) | Nanoseconds (ns) |
|---|---|
| 0.0000001 d | 8,640,000 ns |
| 0.0000002 d | 17,280,000 ns |
| 0.0000003 d | 25,920,000 ns |
| 0.0000004 d | 34,560,000 ns |
| 0.0000005 d | 43,200,000 ns |
| 0.0000006 d | 51,840,000 ns |
| 0.0000007 d | 60,480,000 ns |
| 0.0000008 d | 69,120,000 ns |
| 0.0000009 d | 77,760,000 ns |
| 0.00000001 d | 864,000 ns |
How to Convert Days to Nanoseconds
To convert days to nanoseconds, multiply the time by the following conversion ratio: 8.64e+13 nanoseconds/day.
Since one day is equal to 8.64e+13 nanoseconds, you can use this simple formula to convert:
The time in nanoseconds is equal to the time in days multiplied by 8.64e+13.
For example, here's how to convert 5 days to nanoseconds using the formula above.
How Many Nanoseconds Are in a Day?
There are 8.64e+13 nanoseconds in a day, which is why we use this value in the formula above.
Our day to nanosecond calculator automatically converts your time measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Days and nanoseconds are both units used to measure time. Keep reading to learn more about each unit.
What Is a Day?
A day is a unit of time equal to 86,400 seconds (s), the base unit for time. Civil day equal to 24 hours or 86,400 seconds. [1]
The day is classified as a standard unit of time. Days can be abbreviated as d; for example, 1 day can be written as 1 d.
When working with days (d) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, days (d) are widely used across large-scale industrial, bulk, and macro-level time specifications within international standard workflows, engineering documentation, and technical data sheets.
What Is a Nanosecond?
A nanosecond is a unit of time equal to 1/1,000,000,000 of a second (1e-9 s). One-billionth of a second (10⁻⁹ s), used in RAM and CPU clock cycles. [2]
The nanosecond is classified as a metric and SI-compatible unit of time. Nanoseconds can be abbreviated as ns; for example, 1 nanosecond can be written as 1 ns.
In the metric system, "nano" is the standard SI prefix for billionths, or 10⁻⁹. This makes the nanosecond (ns) a convenient decimal multiple of the second (s).
In practice, nanoseconds (ns) are widely used across fine-tolerance laboratory, analytical, and micro-scale time measurements within SI metric workflows, engineering documentation, and technical data sheets.
When converting time between days (d) and nanoseconds (ns), keep full floating-point precision (1 d = 8.64e+13 ns; 1 ns = 1.157407e-14 d) during intermediate calculations and round only the final nanosecond figure to match your instrument tolerance.
More Day & Nanosecond Conversions
Need to calculate in the opposite direction? Use our nanoseconds to days calculator to switch your starting unit immediately. You can also explore related tools such as converting nanoseconds to days, converting days to hours, or converting days to weeks.
Convert from Days
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Time)·Time Metrology Standard — Days (d) to Nanoseconds (ns)
- [2]BIPM SpecificationBIPM (SI Base Unit: Second (s))·Unit Specifications: Day (d) & Nanosecond (ns)
- [3]NIST CUU ReferenceNIST CUU (Non-SI Units Accepted for Use (min, h, d))·Conversion Factors & Mathematical Basis (d to ns)