diff --git a/sway-lib-std/src/primitive_conversions/b256.sw b/sway-lib-std/src/primitive_conversions/b256.sw
index b530259dcdd..52d3157c500 100644
--- a/sway-lib-std/src/primitive_conversions/b256.sw
+++ b/sway-lib-std/src/primitive_conversions/b256.sw
@@ -37,6 +37,32 @@ impl From<u256> for b256 {
     }
 }
 
+impl From<(u64, u64, u64, u64)> for b256 {
+    /// Casts a tuple of 4 `u64` values to a `b256`.
+    ///
+    /// # Arguments
+    ///
+    /// * `nums`: (u64, u64, u64, u64) - The tuple of `u64` values to be casted.
+    ///
+    /// # Returns
+    ///
+    /// * [b256] - The `b256` representation of the tuple of `u64` values.
+    ///
+    /// # Examples
+    ///
+    /// ```sway
+    ///
+    /// fn foo() {
+    ///    let b256_value = b256::from((1, 2, 3, 4));
+    /// }
+    /// ```
+    fn from(nums: (u64, u64, u64, u64)) -> Self {
+        asm(nums: nums) {
+            nums: b256
+        }
+    }
+}
+
 #[test]
 fn test_b256_try_from_bytes() {
     use ::assert::assert;
@@ -76,3 +102,13 @@ fn test_b256_from_u256() {
     let res = b256::from(val);
     assert(res == 0x0000000000000000000000000000000000000000000000000000000000000000);
 }
+
+#[test]
+fn test_b256_from_tuple() {
+    use ::assert::assert;
+
+    let b256_value = <b256 as From<(u64, u64, u64, u64)>>::from((1, 2, 3, 4));
+    assert(
+        b256_value == 0x0000000000000001000000000000000200000000000000030000000000000004,
+    );
+}
diff --git a/sway-lib-std/src/primitive_conversions/u256.sw b/sway-lib-std/src/primitive_conversions/u256.sw
index 4c32f18a772..8e840404cd5 100644
--- a/sway-lib-std/src/primitive_conversions/u256.sw
+++ b/sway-lib-std/src/primitive_conversions/u256.sw
@@ -124,6 +124,32 @@ impl From<b256> for u256 {
     }
 }
 
+impl From<(u64, u64, u64, u64)> for u256 {
+    /// Casts a tuple of 4 `u64` values to a `u256`.
+    ///
+    /// # Arguments
+    ///
+    /// * `nums`: (u64, u64, u64, u64) - The tuple of `u64` values to be casted.
+    ///
+    /// # Returns
+    ///
+    /// * [u256] - The `u256` representation of the tuple of `u64` values.
+    ///
+    /// # Examples
+    ///
+    /// ```sway
+    ///
+    /// fn foo() {
+    ///    let u256_value = u256::from((1, 2, 3, 4));
+    /// }
+    /// ```
+    fn from(nums: (u64, u64, u64, u64)) -> Self {
+        asm(nums: nums) {
+            nums: u256
+        }
+    }
+}
+
 // TODO: Replace <u256 as From<T>> with u256::from when https://github.com/FuelLabs/sway/issues/5798 is resolved.
 #[test]
 fn test_u256_from_u8() {
@@ -179,3 +205,13 @@ fn test_u256_from_b256() {
         u256_value == 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff_u256,
     );
 }
+
+#[test]
+fn test_u256_from_tuple() {
+    use ::assert::assert;
+
+    let u256_value = <u256 as From<(u64, u64, u64, u64)>>::from((1, 2, 3, 4));
+    assert(
+        u256_value == 0x0000000000000001000000000000000200000000000000030000000000000004_u256,
+    );
+}