# Free ISO Week Number Finder & Converter

> Look up today's ISO week or convert any date to the YYYY-Www format used by ScrollLaunch launch weeks, analytics, and weekly leaderboards.

```yaml
url: "https://www.scrolllaunch.com/tools/iso-week"
slug: iso-week
keywords: "iso week number, what week is it, iso week finder, date to iso week, yyyy-www converter"
```

## How to use

1. **Check the current week** — The tool shows today's ISO week string and the Monday–Sunday date range in UTC.
2. **Convert a date** — Pick any calendar date to see which ISO week it falls in and copy the YYYY-Www value.
3. **Plan your launch** — Use that week when scheduling a ScrollLaunch listing, ad booking, or weekly content push.

## Why ISO weeks matter for product launches

ISO 8601 weeks run Monday–Sunday and are identified as YYYY-Www (for example 2026-W28). ScrollLaunch schedules launches, ads, and leaderboards on this calendar so every maker shares the same week boundaries in UTC.

When you book an ad slot or pick a launch week in the dashboard, you are picking an ISO week. Use this tool to align your own content calendar, investor updates, or sprint planning with the same numbering.

Week 1 is the week with the year's first Thursday — which is why early January can still belong to the previous ISO year.

## What you get

- Current ISO week instantly
- Date → week converter
- Monday–Sunday week range
- Copy YYYY-Www format

## Related

- [All tools](https://www.scrolllaunch.com/tools)
- [Pricing](https://www.scrolllaunch.com/pricing) — launch free and earn a dofollow backlink.
- [Directories](https://www.scrolllaunch.com/directories) — curated startup directories ranked by DR.