---
title: "Dutch WW Duration Calculator"
method: POST
path: "/api/v1/tools/ww-duration-calculator"
tags: ["tools"]
---

# Dutch WW Duration Calculator

`POST /api/v1/tools/ww-duration-calculator`

## Request

- Base URL: `https://toolforte.com`
- URL: `https://toolforte.com/api/v1/tools/ww-duration-calculator`
- Auth: HTTP bearer

Estimate how many months of Dutch unemployment benefit (WW) an employment history gives: one month per year for the first ten years, half a month per year after that, between three and twenty-four months, with the notional years for people born in 1979 or earlier counted automatically.

## Request body

- object
  - `birthYear` integer
  - `workedYearsSince1998` integer

## Response `200`

Successful result

- object
  - `ok` boolean
  - `data` object
    - `ok` boolean
    - `notionalYears` integer
    - `actualYears` integer
    - `totalYears` integer
    - `months` number
    - `uncappedMonths` number
    - `cappedAtMaximum` boolean
    - `raisedToMinimum` boolean
    - `note` string

## Other responses

- `400`: Missing or invalid request fields
- `401`: Invalid or missing API key
- `429`: Monthly plan limit reached

---

[API](https://skmtc.dev/toolforte/apis/toolforte-api.md) · [All operations](https://skmtc.dev/toolforte/apis/toolforte-api/llms.txt) · [OpenAPI document](https://skmtc.dev/toolforte/apis/toolforte-api/revisions/4d814d484dfc?raw)