diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 4fdf49b64..0c2f76c8d 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -55,6 +55,7 @@ set(fppFiles
     stdlib_math_is_close.fypp
     stdlib_math_all_close.fypp
     stdlib_math_diff.fypp
+    stdlib_str2num.fypp
     stdlib_string_type.fypp
     stdlib_string_type_constructor.fypp
     stdlib_strings_to_string.fypp
@@ -82,7 +83,6 @@ set(SRC
     stdlib_specialfunctions_legendre.f90
     stdlib_quadrature_gauss.f90
     stdlib_stringlist_type.f90
-    stdlib_str2num.f90
     ${outFiles}
 )
 
diff --git a/src/stdlib_str2num.f90 b/src/stdlib_str2num.fypp
similarity index 93%
rename from src/stdlib_str2num.f90
rename to src/stdlib_str2num.fypp
index 68f1e9510..fd9b241c8 100644
--- a/src/stdlib_str2num.f90
+++ b/src/stdlib_str2num.fypp
@@ -1,3 +1,4 @@
+#:include "common.fypp"
 !> The `stdlib_str2num` module provides procedures and interfaces for conversion
 !> of characters to numerical types. Currently supported: int32, real32 and real64
 !>
@@ -22,7 +23,7 @@
 !>   difference rel :                                 0.3300E-029%
 
 module stdlib_str2num
-    use iso_fortran_env, only: sp => real32, dp => real64, qp => real128
+    use stdlib_kinds, only: sp, dp, qp, int8, int16, int32, int64
     use ieee_arithmetic
     implicit none
     private
@@ -43,24 +44,36 @@ module stdlib_str2num
     integer(kind=ikind), parameter :: LF = 10, CR = 13, WS = 32
 
     interface to_num
-        module procedure to_int
+        #:for k1, t1 in INT_KINDS_TYPES
+        module procedure to_${k1}$
+        #:endfor
         module procedure to_float
         module procedure to_double
+#:if WITH_QP
         module procedure to_quad
+#:endif
     end interface
 
     interface to_num_p
-        module procedure to_int_p
+        #:for k1, t1 in INT_KINDS_TYPES
+        module procedure to_${k1}$_p
+        #:endfor
         module procedure to_float_p
         module procedure to_double_p
+#:if WITH_QP
         module procedure to_quad_p
+#:endif
     end interface
 
     interface to_num_base
-        module procedure to_int_32
+        #:for k1, t1 in INT_KINDS_TYPES
+        module procedure to_int_${k1}$
+        #:endfor
         module procedure to_real_sp
         module procedure to_real_dp
+#:if WITH_QP
         module procedure to_real_qp
+#:endif
     end interface
     
     contains
@@ -69,33 +82,35 @@ module stdlib_str2num
     ! String To Number interfaces
     !---------------------------------------------
 
-    elemental function to_int(s,mold) result(v)
+    #:for k1, t1 in INT_KINDS_TYPES
+    elemental function to_${k1}$(s,mold) result(v)
         ! -- In/out Variables
         character(*), intent(in) :: s !> input string
-        integer, intent(in) :: mold !> dummy argument to disambiguate at compile time the generic interface
-        integer :: v !> Output integer 32 value
+        ${t1}$, intent(in) :: mold !> dummy argument to disambiguate at compile time the generic interface
+        ${t1}$ :: v !> Output integer 32 value
         ! -- Internal Variables
-        integer(1) :: p !> position within the number
-        integer(1)  :: stat !> error status
+        integer(int8) :: p !> position within the number
+        integer(int8)  :: stat !> error status
         !----------------------------------------------
         call to_num_base(s,v,p,stat)
     end function
     
-    function to_int_p(s,mold,stat) result(v)
+    function to_${k1}$_p(s,mold,stat) result(v)
         ! -- In/out Variables
         character(len=:), pointer :: s !> input string
-        integer, intent(in) :: mold !> dummy argument to disambiguate at compile time the generic interface
-        integer :: v !> Output integer 32 value
-        integer(1),intent(inout), optional :: stat
+        ${t1}$, intent(in) :: mold !> dummy argument to disambiguate at compile time the generic interface
+        ${t1}$ :: v !> Output ${t1}$ value
+        integer(int8),intent(inout), optional :: stat
         ! -- Internal Variables
-        integer(1) :: p !> position within the number
-        integer(1) :: err
+        integer(int8) :: p !> position within the number
+        integer(int8) :: err
         !----------------------------------------------
         call to_num_base(s,v,p,err)
         p = min( p , len(s) )
         s => s(p:)
         if(present(stat)) stat = err
     end function
+    #:endfor
 
     elemental function to_float(s,mold) result(r)
         ! -- In/out Variables
@@ -153,6 +168,7 @@ function to_double_p(s,mold,stat) result(r)
         if(present(stat)) stat = err
     end function
 
+#:if WITH_QP
     function to_quad(s,mold) result(r)
         ! -- In/out Variables
         character(*), intent(in) :: s !> input string
@@ -180,16 +196,18 @@ function to_quad_p(s,mold,stat) result(r)
         s => s(p:)
         if(present(stat)) stat = err
     end function
+#:endif
 
     !---------------------------------------------
     ! String To Number Implementations
     !---------------------------------------------
 
-    elemental subroutine to_int_32(s,v,p,stat)
+    #:for k1, t1 in INT_KINDS_TYPES
+    elemental subroutine to_int_${k1}$(s,v,p,stat)
         !> Return an unsigned 32-bit integer
         ! -- In/out Variables
         character(*), intent(in) :: s !> input string
-        integer(int32), intent(inout)  :: v !> Output real value
+        ${t1}$, intent(out)  :: v !> Output real value
         integer(int8), intent(out)  :: p !> position within the number
         integer(int8), intent(out)  :: stat !> status upon succes or failure to read
         ! -- Internal Variables
@@ -211,6 +229,7 @@ elemental subroutine to_int_32(s,v,p,stat)
         end do
         stat = 0
     end subroutine
+    #:endfor
 
     elemental subroutine to_real_sp(s,v,p,stat)
         integer, parameter :: wp    = sp
@@ -400,6 +419,7 @@ elemental subroutine to_real_dp(s,v,p,stat)
         stat = 0
     end subroutine
 
+#:if WITH_QP
     subroutine to_real_qp(s,v,p,stat)
         integer, parameter :: wp    = qp
         !> Sequentially unroll the character and get the sub integers composing the whole number, fraction and exponent
@@ -502,6 +522,7 @@ subroutine to_real_qp(s,v,p,stat)
         end if
         stat = 0
     end subroutine
+#:endif
     
     !---------------------------------------------
     ! Internal Utility functions
@@ -510,7 +531,7 @@ subroutine to_real_qp(s,v,p,stat)
     elemental function mvs2nwsp(s) result(p)
         !> move string to position of the next non white space character
         character(*),intent(in) :: s !> character chain
-        integer(1) :: p !> position
+        integer(int8) :: p !> position
         !----------------------------------------------
         p = 1
         do while( p<len(s) .and. (iachar(s(p:p))==WS.or.iachar(s(p:p))==LF.or.iachar(s(p:p))==CR) ) 
@@ -529,4 +550,4 @@ elemental function mvs2wsp(s) result(p)
         end do
     end function
     
-end module stdlib_str2num
\ No newline at end of file
+end module stdlib_str2num
diff --git a/test/string/CMakeLists.txt b/test/string/CMakeLists.txt
index f8e3c2323..833471c9e 100644
--- a/test/string/CMakeLists.txt
+++ b/test/string/CMakeLists.txt
@@ -3,6 +3,7 @@
 # Create a list of the files to be preprocessed
 set(fppFiles
     test_string_assignment.fypp
+    test_string_to_number.fypp
 )
 
 fypp_f90("${fyppFlags}" "${fppFiles}" outFiles)
@@ -14,4 +15,5 @@ ADDTEST(string_match)
 ADDTEST(string_derivedtype_io)
 ADDTEST(string_functions)
 ADDTEST(string_strip_chomp)
+ADDTEST(string_to_number)
 ADDTEST(string_to_string)
diff --git a/test/string/test_string_to_number.f90 b/test/string/test_string_to_number.fypp
similarity index 98%
rename from test/string/test_string_to_number.f90
rename to test/string/test_string_to_number.fypp
index 36e749182..1f2190f5b 100644
--- a/test/string/test_string_to_number.f90
+++ b/test/string/test_string_to_number.fypp
@@ -1,5 +1,5 @@
 module test_string_to_number
-    use iso_fortran_env, only: sp=>real32, dp=>real64, qp=>real128
+    use stdlib_kinds, only: sp, dp, qp
     use stdlib_str2num
     use testdrive, only : new_unittest, unittest_type, error_type, check
     implicit none
@@ -14,6 +14,9 @@ subroutine collect_string_to_number(testsuite)
         testsuite = [ &
             new_unittest("to_float", test_to_float), &
             new_unittest("to_double", test_to_double) &
+#:if WITH_QP
+            , new_unittest("to_quadruple", test_to_quadruple) &
+#:endif
             ]
     end subroutine collect_string_to_number
 
@@ -215,6 +218,7 @@ logical function ucheck(s)
         end function
     end subroutine
 
+#:if WITH_QP
     subroutine test_to_quadruple(error)
         use stdlib_str2num
         type(error_type), allocatable, intent(out) :: error
@@ -313,6 +317,7 @@ logical function ucheck(s)
             end if
         end function
     end subroutine
+#:endif
     
 end module test_string_to_number
 
@@ -340,4 +345,4 @@ program tester
         write(error_unit, '(i0, 1x, a)') stat, "test(s) failed!"
         error stop
     end if
-end program
\ No newline at end of file
+end program