diff --git a/Cargo.toml b/Cargo.toml
index c99eed3..69c987a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "bma-ts"
-version = "0.1.10"
+version = "0.1.11"
 edition = "2021"
 authors = ["Serhij S. <div@altertech.com>"]
 license = "MIT"
diff --git a/src/monotonic.rs b/src/monotonic.rs
index 1ecaf85..bf990a9 100644
--- a/src/monotonic.rs
+++ b/src/monotonic.rs
@@ -45,4 +45,8 @@ impl Monotonic {
     pub fn elapsed(&self) -> Duration {
         Self::now().0 - self.0
     }
+    #[inline]
+    pub fn duration_since(&self, earlier: Self) -> Duration {
+        self.0 - earlier.0
+    }
 }
diff --git a/src/timestamp.rs b/src/timestamp.rs
index bf1b7a0..e7460db 100644
--- a/src/timestamp.rs
+++ b/src/timestamp.rs
@@ -31,6 +31,14 @@ impl Timestamp {
             Err(Error::TimeWentBackward)
         }
     }
+    #[inline]
+    pub fn duration_since(self, earlier: Self) -> Result<Duration, Error> {
+        if self >= earlier {
+            Ok(self.0 - earlier.0)
+        } else {
+            Err(Error::TimeWentBackward)
+        }
+    }
     /// Converts between ANSI (Windows, 1601-01-01) and UNIX (1970-01-01) timestamps
     /// The source timestamp MUST be in nanoseconds (for Windows timestamp - multiply the source by
     /// 100)