diff --git a/src/si/pressure.rs b/src/si/pressure.rs
index 121ba265..82be0d96 100644
--- a/src/si/pressure.rs
+++ b/src/si/pressure.rs
@@ -65,6 +65,8 @@ quantity! {
         @inch_of_water_60: 2.488_4_E2; "in H₂O (60 °F)", "inch of water (60 °F)",
             "inches of water (60 °F)";
         @inch_of_water: 2.490_889_E2; "in H₂O", "inch of water", "inches of water";
+        @newton_per_square_millimeter: 1.0_E6; "N/mm²", "newton per square millimeter",
+            "newtons per square millimeter";
         @kilogram_force_per_square_centimeter: 9.806_65_E4; "kgf/cm²",
             "kilogram-force per square centimeter", "kilograms-force per square centimeter";
         @kilogram_force_per_square_meter: 9.806_65_E0; "kgf/m²",
@@ -132,6 +134,7 @@ mod tests {
             test::<f::yoctonewton, a::square_meter, p::yoctopascal>();
 
             test::<f::dyne, a::square_centimeter, p::dyne_per_square_centimeter>();
+            test::<f::newton, a::square_millimeter, p::newton_per_square_millimeter>();
             test::<f::kilogram_force, a::square_millimeter, p::kilogram_force_per_square_millimeter>();
             test::<f::kilogram_force, a::square_centimeter, p::kilogram_force_per_square_centimeter>();
             test::<f::kilogram_force, a::square_meter, p::kilogram_force_per_square_meter>();
diff --git a/src/si/volume_rate.rs b/src/si/volume_rate.rs
index 40e0ff82..6816087f 100644
--- a/src/si/volume_rate.rs
+++ b/src/si/volume_rate.rs
@@ -98,6 +98,9 @@ quantity! {
         @yoctoliter_per_second: prefix!(milli) * prefix!(yocto); "yL/s", "yoctoliter per second",
             "yoctoliters per second";
 
+        @liter_per_minute: prefix!(milli) / 6.0_E1; "L/min", "liter per minute",
+            "liters per minute";
+
         @acre_foot_per_second: 1.233_489_E3; "ac · ft/s", "acre-foot per second",
             "acre-feet per second";
         @barrel_per_second: 1.589_873_E-1; "bbl/s", "barrel per second", "barrels per second";
@@ -221,6 +224,8 @@ mod tests {
             test::<v::zeptoliter, t::second, r::zeptoliter_per_second>();
             test::<v::yoctoliter, t::second, r::yoctoliter_per_second>();
 
+            test::<v::liter, t::minute, r::liter_per_minute>();
+
             test::<v::acre_foot, t::second, r::acre_foot_per_second>();
             test::<v::barrel, t::second, r::barrel_per_second>();
             test::<v::bushel, t::second, r::bushel_per_second>();