diff --git a/src/hru.rs b/src/hru.rs
index f27d4ab..1e57be4 100644
--- a/src/hru.rs
+++ b/src/hru.rs
@@ -52,35 +52,40 @@ fn convert(input: u64) -> (f64, u32) {
 fn main() -> ExitCode {
 	let argv = args().collect::<Vec<String>>();
 	let mut buf = String::new();
-	let _ = stdin().read_line(&mut buf);
+	while let Ok(_) = stdin().read_line(&mut buf) {
+		if buf.is_empty() { return ExitCode::SUCCESS; }
 
-	let n: u64 = match buf.trim().parse() {
-		Ok(f) => f,
-		Err(err) => {
-			eprintln!("{}: {}", argv[0], err);
-			return ExitCode::from(EX_DATAERR as u8);
-		},
-	};
+		let n: u64 = match buf.trim().parse() {
+			Ok(f) => {
+				buf.clear();
+				f
+			},
+			Err(err) => {
+				eprintln!("{}: {}", argv[0], err);
+				return ExitCode::from(EX_DATAERR as u8);
+			},
+		};
 
-	let (number, prefix) = convert(n);
+		let (number, prefix) = convert(n);
 
-	let si_prefix = format!("{}B", match prefix {
-		3 => "K",
-		6 => "M",
-		9 => "G",
-		12 => "T",
-		15 => "P",
-		18 => "E",
-		21 => "Z",
-		24 => "Y",
-		27 => "R",
-		30 => "Q",
-		_ => "",
-	});
+		let si_prefix = format!("{}B", match prefix {
+			3 => "K",
+			6 => "M",
+			9 => "G",
+			12 => "T",
+			15 => "P",
+			18 => "E",
+			21 => "Z",
+			24 => "Y",
+			27 => "R",
+			30 => "Q",
+			_ => "",
+		});
 
-	let out = ((number * 10.0).round() / 10.0).to_string();
+		let out = ((number * 10.0).round() / 10.0).to_string();
 
-	println!("{} {}", out, si_prefix);
+		println!("{} {}", out, si_prefix);
+	}
 
 	ExitCode::SUCCESS
 }