FMath::RadiansToDegrees

function Core Since 4.0

#include "Math/UnrealMathUtility.h"

Access: public Specifiers: staticconstexpr

Description

Converts an angle from radians to degrees by multiplying by 180/π. Works with float, double, or any arithmetic type.

Caveats & Gotchas

• Uses the float constant UE_PI (single precision) in the generic template, so passing a double may lose precision. Use the explicit double overload (RadiansToDegrees(double)) for full double precision.
• The [[nodiscard]] attribute means the compiler will warn if you call this without using the return value — a common mistake when converting in-place.

Signature

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

Parameters

Name	Type	Description	Default
RadVal	T const&	Angle value in radians to convert.	—

Return Type

auto (T)

Example

Convert a computed radian angle to degrees for display C++

float AngleRad = FMath::Atan2(Direction.Y, Direction.X);
float AngleDeg = FMath::RadiansToDegrees(AngleRad);
UE_LOG(LogGame, Log, TEXT("Angle: %.2f degrees"), AngleDeg);

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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