🕐 Unix Timestamp Converter

What This Tool Does

This tool converts between Unix timestamps and human-readable dates, in both directions. Enter a Unix timestamp — the long number that systems use to represent a moment in time — and it shows the date and time it represents; enter a date and it gives you the timestamp. It is an everyday helper for developers working with logs, databases, APIs, and any system that stores time as a number.

Computers very often store time not as a readable date but as a single number counting seconds from a fixed reference point. That format is efficient for machines but meaningless to read directly, so converting between the timestamp and a normal date is a constant need in technical work — and doing it by hand is impractical.

What a Unix Timestamp Is

A Unix timestamp is the number of seconds that have elapsed since a specific reference moment known as the Unix epoch: midnight UTC on January 1, 1970. So a timestamp of 0 is that exact moment, and every timestamp since is simply how many seconds have passed. This gives every point in time a single, unambiguous number — for example, a timestamp around 1.7 billion corresponds to a date in the mid-2020s, since that many seconds have accumulated since 1970.

The appeal of this system for computers is its simplicity. A single number is easy to store, compare, sort, and do arithmetic with — finding the time between two events is just subtraction. It is also free of the complications of time zones, months of different lengths, and date formats, because it represents an absolute moment in universal time. The trade-off is that the number means nothing to a human at a glance, which is why converting it back to a readable date is so frequently necessary.

Quick Tips

• A Unix timestamp counts seconds since January 1, 1970, at midnight UTC — timestamp 0 is that moment.
• Timestamps are in universal time (UTC), so account for time zones when displaying them to users.
• The time between two events is just the difference between their timestamps.
• Convert timestamps from logs to readable dates when debugging when something happened.

Frequently Asked Questions

What is a Unix timestamp?

It is the number of seconds since the Unix epoch — midnight UTC on January 1, 1970. Every moment in time has a single timestamp, making it an efficient way for computers to store and compare times.

Why do systems store time as a number?

Because a single number is easy to store, sort, compare, and do arithmetic with, and it avoids the complications of time zones and date formats. It represents an absolute moment in universal time.

What time zone are timestamps in?

Unix timestamps are in universal time (UTC). To display the correct local time to a user, you convert the timestamp and adjust for their time zone, since the timestamp itself is zone-independent.

How do I find the time between two timestamps?

Subtract one from the other — the result is the number of seconds between them. Because timestamps are just counts of seconds, durations are simple arithmetic.