Days to Seconds Converter
Enter days, get seconds
Days → Seconds quick reference
| Days | Seconds |
|---|---|
| 0.5 | 43,200 |
| 1 | 86,400 |
| 2 | 172,800 |
| 7 | 604,800 |
| 14 | 1,209,600 |
| 30 | 2,592,000 |
| 90 | 7,776,000 |
| 365 | 31,536,000 |
Rule: multiply days by 86,400 to get seconds.
Days to seconds — quick FAQ
What is the formula?
seconds = days × 86,400. One day is 24 hours × 60 minutes × 60 seconds.
Do fractional days work?
Yes. For example, 2.5 days × 86,400 = 216,000 seconds.
Does daylight saving time affect this?
No. This is a pure unit conversion. For real calendar ranges across DST, use the Date Difference Calculator.
Where’s seconds → days?
Use the paired tool: Seconds to Days Converter.
How to convert days to seconds (and why it helps)
Turning days into seconds is a straight multiplication: a day contains 86,400 seconds. That number comes from 24 hours per day, 60 minutes per hour, and 60 seconds per minute. Multiply your day value by 86,400 and you get an exact second count—no guesswork, no rounding rules imposed by the page. Because these are fixed units, the result doesn’t depend on time zones or seasonal clock changes.
The UI is intentionally simple for speed. You enter a day value, press Convert, and the headline answers in plain language—“2 days = 172,800 seconds.” A compact key–value block lists both inputs and outputs with locale-aware number formatting so long values remain readable on mobile. You can copy the summary with a single tap and paste it into a message, ticket, or spec without reformatting.
Why seconds? In operations and engineering, seconds are the standard unit for timeouts, TTLs, cache lifetimes, rate limits, video/audio durations, and scheduling buffers. Translating a plan from “days” to seconds removes ambiguity when you configure systems that expect precise durations. For example, “7 days” becomes “604,800 seconds,” which drops directly into a config file or script. If you’re coordinating an API deprecation or a maintenance window, seconds make comparisons between systems consistent.
Decimals are supported. Half a day is 43,200 seconds; a quarter day is 21,600 seconds. Enter values like 0.5 or 2.75 and the page will handle them. If your locale uses commas for decimals, you can type 2,75; we normalize the input behind the scenes. The goal is to let you work the way you normally type numbers on your phone or laptop.
Keep unit conversion separate from calendar math. Two days from Friday 23:00 won’t necessarily land where you expect if you’re trying to place an event on a specific weekday. For that, use a date-aware planner. Here, we focus on the constant factor that never changes: 86,400 seconds per day. This is exactly what you want when the next step is a script, a CRON expression, a CDN header, or a queue retention setting.
The quick reference table includes common day counts and their second equivalents. It acts as a sanity check and a time-saver—no need to re-enter the numbers you already know. For anything outside the list, use the input, press convert, and copy the result. The paired Swap Units link takes you to seconds → days in one tap, so both directions are always within reach.
Design-wise, this tool matches the rest of our Time & Date pages: one job per page, clear hierarchy, keyboard-friendly controls, and results you can copy. There’s no tracking and no server roundtrip; everything runs locally in the browser for speed and privacy. That makes it reliable on spotty networks and safe for internal work.
In short, when someone asks “how many seconds is that?”, type the day count, press convert, copy the headline, and move on. Precise, predictable, and easy to reuse wherever seconds are the language your tools speak.