One day is exactly 8.640000000e+16 picoseconds, so converting days to picoseconds is a single multiplication. Enter any figure and the result appears as you type — the arithmetic runs in your browser, so nothing is sent anywhere.
Exactly 86,400 seconds by convention (leap seconds excepted). One trillionth of a second — signal timing inside a processor.
Months and years are not fixed. This page uses the average Gregorian month of 30.44 days and the Julian year of 365.25 days, which is right for durations and wrong for calendars: three months from 31 January is not 91.31 days in any useful sense. Use a date calculator for calendar arithmetic. Two tables follow: rounded steps for quick lookup, and a set of real reference quantities converted into picoseconds, which is usually more useful than the bare number.
The formula
days- The amount you are converting, in days
8.64000000000e+16- The exact number of picoseconds in one day
picoseconds- The converted result
How it works, step by step
- Enter the value in days.
- It is multiplied by 8.64000000000e+16, the exact factor between the two units.
- The answer is shown in picoseconds, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
A pop song: 0.00243 d in picoseconds
A pop song comes to about 0.00243 d. Multiplying by the factor: 0.00243 × 8.64000e+16 = 2.09952e+14 ps. Dividing the answer back by 8.64000e+16 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
A working day: 0.333 d in picoseconds
A working day comes to about 0.333 d. Multiplying by the factor: 0.333 × 8.64000e+16 = 2.87712e+16 ps. Dividing the answer back by 8.64000e+16 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
How to read your score
Frequently asked questions
How many picoseconds are in one day?
Exactly 8.64000000000e+16. Every figure on this page is that one number multiplied by your input, so the only rounding is at the display step.
What is the formula to convert days to picoseconds?
picoseconds = days × 8.64000000000e+16. Reversed, days = picoseconds ÷ 8.64000000000e+16, which is the same as multiplying by 1.15740740741e-17.
Which is the bigger unit, the day or the picosecond?
The day. One day equals 8.64000e+16 picoseconds.
What does this quantity actually measure?
Both units measure time. That is why a single factor is enough: there is no temperature offset and no material property involved, unlike conversions that cross between different quantities.
What is a day?
Exactly 86,400 seconds by convention (leap seconds excepted).
What is a picosecond?
One trillionth of a second — signal timing inside a processor.
Why does my answer differ from another converter?
Almost always because the other tool rounded the factor before multiplying. This page keeps full double precision through the calculation and rounds only for display, and it prints the factor it used so you can see where any difference came from.
Is there a quick way to do d to ps in my head?
Plenty of people do this in their head: multiply by 8.6000e+16 instead of using the exact factor 8.6400e+16. At 100 that shortcut gives 8.6000e+18 picoseconds, off by 4.0000e+16 picoseconds or about 0.46%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Days to picoseconds reference tables
| Days | Picoseconds |
|---|---|
| 0.5 d | 4.32000e+16 ps |
| 1 d | 8.64000e+16 ps |
| 2 d | 1.72800e+17 ps |
| 3 d | 2.59200e+17 ps |
| 5 d | 4.32000e+17 ps |
| 10 d | 8.64000e+17 ps |
| 20 d | 1.72800e+18 ps |
| 25 d | 2.16000e+18 ps |
| 50 d | 4.32000e+18 ps |
| 75 d | 6.48000e+18 ps |
| 100 d | 8.64000e+18 ps |
| 250 d | 2.16000e+19 ps |
| 500 d | 4.32000e+19 ps |
| 1000 d | 8.64000e+19 ps |
| 5000 d | 4.32000e+20 ps |
Exact factor: 1 day = 8.64000000000e+16 picoseconds.
| Quantity | d | ps |
|---|---|---|
| A camera flash | 1.157e-08 d | 1e+09 ps |
| A heartbeat | 9.919e-06 d | 8.57e+11 ps |
| A pop song | 0.002431 d | 2.1e+14 ps |
| A working day | 0.3333 d | 2.880e+16 ps |
| A pregnancy | 280 d | 2.419e+19 ps |
| A mortgage term | 8766 d | 7.574e+20 ps |
Published reference values, converted with the same factor this page uses.