Time Converter

Overview

Convert between time units, from nanoseconds to years. Count the time and business days between two dates, turn a Unix timestamp into a readable date, or see one date in ISO 8601, RFC 2822, Unix time and Julian day. It all runs in your browser, so timestamps from your logs stay on your computer.

Debugging Unix timestampsPaste an epoch value from a log or database and see the date and time it stands for.
Counting working daysSee how many weekdays sit between today and a deadline.
Project duration planningGet the exact days, hours and minutes between a start date and an end date.
Reading log filesTurn millisecond timestamps from traces or audit logs into readable ISO 8601 dates.
API date formatsGet the same date as ISO 8601, RFC 2822 or Unix time for the API you're working with.

Key features

Time units from nanoseconds to years
Time between two dates
Unix timestamps to readable dates
ISO 8601, RFC 2822 and short date formats
Seconds or milliseconds detected automatically
Business days, weekends left out
Leap years counted correctly
Julian day numbers
Plain-language summary of a period
Quick presets like now, yesterday and next week
Copy any result with one click
Breakdown in years, months, days, hours, minutes, seconds
Precision down to the millisecond
Scientific notation for very large or small values

Set

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Specification

Command: time.time_converter
Set: Time
Input: text
Output: —
Max file: no limit
Batch: single file

Runtime

Engine: Intl.DateTimeFormat
Threads: single
Isolated: —
WebGPU: —
Memory: —

Transport 0 B

Your file is opened, worked on and saved inside this tab. This tool has no upload step, so your file has nowhere else to go.

Keys

Search: ⌘K
Panels: ⌘1 · ⌘2
Full width: F
All keys: ⌘/

How it works

Pick a mode

Choose units, period, timestamp or format.

Enter your values

Type a number or timestamp, or pick dates and times.

Read the result

The answer updates as you type, ready to copy.

Frequently asked

What types of time conversions can I perform?

Four: time units (nanoseconds to years), the period between two dates, Unix timestamps to dates, and one date shown in ISO 8601, RFC 2822, Unix time, Julian day and short date formats.

Does the tool handle daylight saving time (DST)?

Dates and times use your device's local time zone, and your browser applies daylight saving time for it. There is no converter between two time zones yet.

Can I convert Unix timestamps?

Yes. Paste a timestamp in seconds (10 digits) or milliseconds (13 digits) and you get the local time, ISO 8601 and RFC 2822. The format mode goes the other way, from a date to Unix time.

Is my time data sent to your servers?

No. Every calculation runs in your browser, so nothing you enter leaves your computer.

What's the precision of time calculations?

Unit conversions go from nanoseconds to years. Dates and timestamps are exact to the millisecond, and leap years are counted.

Can I calculate business days between dates?

Yes. The period mode counts business days by leaving out Saturdays and Sundays. Public holidays are not taken into account.

Keys

Search: ⌘K
Panels: ⌘1 · ⌘2
Full width: F
All keys: ⌘/