---
title: "Epw To Ddy"
method: POST
path: "/api/tools/epw-to-ddy"
tags: ["Tools (analyse and convert EPW files)"]
---

# Epw To Ddy

`POST /api/tools/epw-to-ddy`

## Request

- Base URL: `https://epw.tools`
- URL: `https://epw.tools/api/tools/epw-to-ddy`
- Auth: none declared

DDY whose design days come from the uploaded EPW's own weather (a
user's future EPWs from elsewhere came with today's ASHRAE DDY). One
year of percentiles is an estimate; the response says so.

## Headers

- `X-API-Key` string, nullable

## Response `200`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/epw/apis/epw-tools-api.md) · [All operations](https://skmtc.dev/epw/apis/epw-tools-api/llms.txt) · [OpenAPI document](https://skmtc.dev/epw/apis/epw-tools-api/revisions/e6b60fc7a6d7?raw)