Unix timestamp converter
Convert Unix seconds or milliseconds to a date, or an ISO date to a timestamp.
Developer toolsDate difference calculator
Find the number of calendar days and weeks between two dates.
Ready when you are.
◎ No uploads. Your input stays here.↗ Free to use. No account needed.⌘ / Ctrl + Enter to run
A worked example
Using the default settings and the values below.
Input / settings
{
"start": "2024-01-01",
"end": "2024-02-01"
}Expected result
31 calendar days 4 full weeks and 3 days 2024-01-01 → 2024-02-01
A LITTLE GUIDANCE
How to use Date difference calculator
Choose a start and end date. The signed difference excludes the start date; reverse the dates for a negative result.
Good to know
Uses calendar dates in UTC so daylight-saving changes do not alter day counts. It does not count business days or holidays.
A few quick answers.
Are both start and end dates counted?
No. The result is the elapsed calendar-day difference; the same date gives zero. Dates are compared at UTC midnight so daylight-saving changes do not create partial days.
Is my input sent to a server?
No. This tool processes your input in your browser. We don't store your text, files or results. Standard website access logs are separate; read our privacy notes.
Can I use it for free?
Yes. No account, subscription or usage credits are required.
How do I keep my result?
Use Copy or Download after running the tool. Inputs are not saved automatically and disappear when you leave or refresh the page.
Something not right? Report a problem with this tool. Include the steps, but never passwords or private input.