diff --git a/Source/utils/hp_mana_units.hpp b/Source/utils/hp_mana_units.hpp
new file mode 100644
index 000000000..d20ed8af2
--- /dev/null
+++ b/Source/utils/hp_mana_units.hpp
@@ -0,0 +1,23 @@
+#pragma once
+
+namespace devilution {
+
+constexpr int HpManaFracBits = 6;
+constexpr int HpManaScale = 1 << HpManaFracBits;
+
+constexpr int HpManaToFrac(int whole)
+{
+	return whole * HpManaScale;
+}
+
+constexpr int HpManaToWhole(int frac)
+{
+	return frac / HpManaScale;
+}
+
+constexpr int HpManaFromParts(int whole, int frac)
+{
+	return HpManaToFrac(whole) + frac;
+}
+
+} // namespace devilution