FMath::DegreesToRadians

function Core Since 4.0

#include "Math/UnrealMathUtility.h"

Access: public Specifiers: staticconstexpr

Description

Converts an angle from degrees to radians by multiplying by π/180. The most commonly used angle conversion in UE — required before passing degree values to sin/cos/atan.

Caveats & Gotchas

• UE's FRotator stores angles in degrees, so always convert via this function before feeding rotator components into trigonometric functions. Forgetting the conversion is a very common source of incorrect rotation logic.
• Like RadiansToDegrees, the generic template uses single-precision UE_PI. For double-precision work, rely on the explicit double overload to get UE_DOUBLE_PI.

Signature

template<class T>
[[nodiscard]] static constexpr UE_FORCEINLINE_HINT auto DegreesToRadians(T const& DegVal) -> decltype(DegVal * (UE_PI / 180.f))

Parameters

Name	Type	Description	Default
DegVal	T const&	Angle value in degrees to convert.	—

Return Type

auto (T)

Example

Convert a yaw angle before computing direction vector C++

float YawDeg = MyController->GetControlRotation().Yaw;
float YawRad = FMath::DegreesToRadians(YawDeg);
FVector ForwardDir(FMath::Cos(YawRad), FMath::Sin(YawRad), 0.f);

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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