diff --git a/src/parse.rs b/src/parse.rs
index bc9dc95..8ca2c3a 100644
--- a/src/parse.rs
+++ b/src/parse.rs
@@ -108,9 +108,21 @@ fn parse_unit(input: String) -> Result<NonMetric, ParseError> {
 		"F" => Ok(NonMetric::Fahrenheit),
 
 		// Area
+		"square inch" => Ok(NonMetric::SquareInch),
+		"square inches" => Ok(NonMetric::SquareInch),
+		"square in" => Ok(NonMetric::SquareInch),
+		"sq inch" => Ok(NonMetric::SquareInch),
+		"sq inches" => Ok(NonMetric::SquareInch),
+		"sq in" => Ok(NonMetric::SquareInch),
 		"inch²" => Ok(NonMetric::SquareInch),
 		"inches²" => Ok(NonMetric::SquareInch),
 		"in²" => Ok(NonMetric::SquareInch),
+		"\"²" =>  Ok(NonMetric::SquareInch),
+		"″²" =>  Ok(NonMetric::SquareInch),
+		"inch^2" =>  Ok(NonMetric::SquareInch),
+		"inches^2" =>  Ok(NonMetric::SquareInch),
+		"in^2" =>  Ok(NonMetric::SquareInch),
+		"\"^2" =>  Ok(NonMetric::SquareInch),
 
 		"foot²" => Ok(NonMetric::SquareFoot),
 		"feet²" => Ok(NonMetric::SquareFoot),
@@ -281,9 +293,21 @@ mod test {
 		assert_eq!(parse_unit("F".to_string()), Ok(NonMetric::Fahrenheit));
 
 		// Area
+		assert_eq!(parse_unit("square inch".to_string()), Ok(NonMetric::SquareInch));
+		assert_eq!(parse_unit("square inches".to_string()), Ok(NonMetric::SquareInch));
+		assert_eq!(parse_unit("square in".to_string()), Ok(NonMetric::SquareInch));
+		assert_eq!(parse_unit("sq inch".to_string()), Ok(NonMetric::SquareInch));
+		assert_eq!(parse_unit("sq inches".to_string()), Ok(NonMetric::SquareInch));
+		assert_eq!(parse_unit("sq in".to_string()), Ok(NonMetric::SquareInch));
 		assert_eq!(parse_unit("inch²".to_string()), Ok(NonMetric::SquareInch));
 		assert_eq!(parse_unit("inches²".to_string()), Ok(NonMetric::SquareInch));
 		assert_eq!(parse_unit("in²".to_string()), Ok(NonMetric::SquareInch));
+		assert_eq!(parse_unit("\"²".to_string()), Ok(NonMetric::SquareInch));
+		assert_eq!(parse_unit("″²".to_string()), Ok(NonMetric::SquareInch));
+		assert_eq!(parse_unit("inch^2".to_string()), Ok(NonMetric::SquareInch));
+		assert_eq!(parse_unit("inches^2".to_string()), Ok(NonMetric::SquareInch));
+		assert_eq!(parse_unit("in^2".to_string()), Ok(NonMetric::SquareInch));
+		assert_eq!(parse_unit("\"^2".to_string()), Ok(NonMetric::SquareInch));
 
 		assert_eq!(parse_unit("foot²".to_string()), Ok(NonMetric::SquareFoot));
 		assert_eq!(parse_unit("feet²".to_string()), Ok(NonMetric::SquareFoot));