etl/docs/chrono/duration/duration_cast.md
2026-05-19 12:12:14 +01:00

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---
title: "duration_cast"
---
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Header: `chrono.h`
From: `20.41.0`
Similar to: [std::chrono::duration_cast](https://en.cppreference.com/w/cpp/chrono/duration/duration_cast.html)
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Templates representing a time interval.
## duration_cast
```cpp
template <typename TToDuration, typename TRep, typename TPeriod>
ETL_CONSTEXPR14
TToDuration duration_cast(const etl::chrono::duration<TRep, TPeriod>& d)
ETL_NOEXCEPT
```
**Description**
Converts from one duration type to another.