Date to Timestamp
Use this free Date to Timestamp to quickly get accurate results in seconds, free and instantly offline with no signup required ever, trusted by professionals in Austin, Chicago, Miami, Denver, Seattle, and New York for reliable daily use without accounts, subscriptions, limits, or delays on any device for everyday personal and business workflows daily.
Convert any date and time to a Unix timestamp in seconds or milliseconds, then back again, using this free date to timestamp converter.
Calculator Inputs
About Date to Timestamp
Use this free Date to Timestamp to quickly get accurate results in seconds, free and instantly offline with no signup required ever, trusted by professionals in Austin, Chicago, Miami, Denver, Seattle, and New York for reliable daily use without accounts, subscriptions, limits, or delays on any device for everyday personal and business workflows daily.
Date to Timestamp — Unix Epoch Conversion in Seconds and Milliseconds: A Unix timestamp is the number of seconds (or milliseconds) elapsed since 00:00:00 UTC on January 1, 1970 (the Unix epoch). This tool converts any date and optional time into a Unix timestamp in either seconds (10 digits) or milliseconds (13 digits). It also shows the UTC-formatted datetime for verification. This free converter runs instantly offline with no signup required ever, completing in seconds in your browser.
The conversion works by creating a JavaScript Date object from your input and calling getTime(), which returns the internal millisecond representation. Dividing by 1,000 and rounding gives the seconds value. The tool interprets the entered date and time in your local timezone, then converts to UTC for the timestamp calculation. This is why the same date can produce different timestamps depending on your timezone.
The seconds format (10 digits) is the standard Unix timestamp used by most APIs, databases, and server-side systems. The milliseconds format (13 digits) is used by JavaScript's Date.getTime(), many modern APIs (Google, Firebase, Stripe), and distributed systems like Kafka. A Chicago database admin on 09/15/2026 migrating a $50,000 database needs seconds; a Miami mobile developer syncing device times needs milliseconds.
Practical use cases include API integration (where dates are exchanged as epoch values), database migration (converting DATE columns to INTEGER), log analysis (parsing timestamped entries), and payment processing (timestamping transactions). A New York fintech developer timestamping $1 million in transactions on 09/15/2026 at 14:30 needs the exact epoch for audit trail integrity.
All conversion happens in your browser with zero server calls, zero data storage, and zero accounts. No date data is transmitted or logged. Whether you are an Austin developer building a $30,000 API integration, a Denver engineer debugging epoch values in server logs, or a Seattle DevOps engineer converting deploy dates to Unix time, this free converter transforms dates to timestamps instantly offline with no signup required ever.
Where it is used
An Austin developer converting API date fields to timestamps for a $30,000 integration, a Chicago database admin converting 09/15/2026 to epoch for a $50,000 migration, a Miami mobile dev syncing device timestamps for a $20,000 app, a Denver backend engineer debugging epoch values in logs, a Seattle DevOps engineer converting deploy dates to Unix time, and a New York fintech developer timestamping $1 million transactions on 09/15/2026.
How to use the Date to Timestamp
- Date and time — enter the value (Pick a date; time is optional and defaults to midnight local time.).
- Time (HH:MM) — optional — enter the value (e.g. 14:30).
- Unit — enter the value.
- Calculate — press the Calculate button to see the result instantly above.
Examples
New Year 2026
With time
Milliseconds
Frequently Asked Questions
- Why do I get a different value than UTC-based tools?
- The tool interprets your input in your local timezone. If you want UTC, enter the UTC time directly. The UTC field shows the converted value for verification.
- Should I use seconds or milliseconds?
- Most APIs and databases use seconds (10 digits). JavaScript's Date.getTime() and many modern APIs (Firebase, Stripe, Kafka) use milliseconds (13 digits). Match your system's format.
- What is the Unix epoch?
- 00:00:00 UTC on January 1, 1970. All Unix timestamps count seconds elapsed since this moment. Dates before the epoch are negative values.
- Does the tool handle timezones?
- Yes — your input is interpreted in your local timezone, then converted to UTC for the timestamp. The UTC field shows the equivalent UTC time.
- What about the Year 2038 problem?
- 32-bit Unix timestamps overflow on 01/19/2038. Modern systems use 64-bit integers, which support dates to the year 292,277,026,596. This tool uses 64-bit math.
- Can I convert a timestamp back to a date?
- Yes — the companion Unix timestamp converter (epoch to date) performs the reverse operation, converting a timestamp to a human-readable date.