UKismetMathLibrary::Conv_DoubleToFloat

function Engine Deprecated Since 5.0

Deprecated: Explicit conversions between floats and doubles are not necessary. Please remove node.

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticBlueprintPure

Description

Converts a 64-bit double to a 32-bit float. This function is deprecated — UE5 treats float and double as compatible and no explicit conversion node is needed.

Caveats & Gotchas

• Marked deprecated with DeprecatedFunction in UE5. The engine now unifies float and double so explicit conversion nodes in Blueprint are unnecessary; the Blueprint compiler will warn you to remove this node.
• Precision loss is possible: doubles have ~15–17 significant decimal digits, floats only ~6–9. Values outside the float range (approx ±3.4×10^38) produce infinity.
• BlueprintInternalUseOnly=true means this node does not appear in the Blueprint node search palette and should not be called directly from Blueprint graphs.

Signature

static UE_INL_API float Conv_DoubleToFloat(double InDouble)

Parameters

Name	Type	Description	Default
InDouble	double	The double-precision value to convert.	—

Return Type

float

Example

C++ narrowing conversion C++

double BigValue = 3.141592653589793;
float NarrowValue = UKismetMathLibrary::Conv_DoubleToFloat(BigValue);
// NarrowValue ≈ 3.1415927f — precision lost beyond 7 significant digits

Version History

Introduced in: 5.0

Version	Status	Notes
5.6	deprecated	Deprecated since UE5.0 — float/double unification makes explicit conversion unnecessary.

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