diff --git a/src/si/electrical_mobility.rs b/src/si/electrical_mobility.rs
new file mode 100644
index 00000000..b9f69e88
--- /dev/null
+++ b/src/si/electrical_mobility.rs
@@ -0,0 +1,56 @@
+//! Electrical mobility (base unit square meter per volt second, kg⁻¹ ·s² · A).
+
+quantity! {
+    /// Electrical mobility (base unit square meter per volt second, kg⁻¹ ·s² · A).
+    quantity: ElectricalMobility; "electrical mobility";
+    /// Dimension of electrical mobility, M⁻¹T²I⁻¹ (base unit square meter per volt second, kg⁻¹ ·s² · A).
+    dimension: ISQ<
+        Z0,     // length
+        N1,     // mass
+        P2,     // time
+        P1,     // electric current
+        Z0,     // thermodynamic temperature
+        Z0,     // amount of substance
+        Z0>;    // luminous intensity
+    units {
+        @square_meter_per_volt_second: prefix!(none); "m²/(V·s)",
+            "square meter per volt second", "square meter per volt seconds";
+        @square_centimeter_per_volt_second: prefix!(centi) * prefix!(centi); "cm²/(V·s)",
+            "square centimeter per volt second", "square centimeter per volt seconds";
+    }
+}
+
+#[cfg(test)]
+mod test {
+    storage_types! {
+        use crate::num::One;
+        use crate::si::electrical_mobility as em;
+        use crate::si::electric_potential as ep;
+        use crate::si::time as t;
+        use crate::si::length as l;
+        use crate::si::quantities::*;
+        use crate::tests::Test;
+
+        #[test]
+        fn check_dimension() {
+            let _: ElectricalMobility<V> = Length::new::<l::meter>(V::one())
+                * Length::new::<l::meter>(V::one())
+                / Time::new::<t::second>(V::one())
+                / ElectricPotential::new::<ep::volt>(V::one());
+        }
+
+        #[test]
+        fn check_units() {
+            test::<l::meter, ep::volt, t::second, em::square_meter_per_volt_second>();
+            test::<l::centimeter, ep::volt, t::second,em::square_centimeter_per_volt_second>();
+
+            fn test<L: l::Conversion<V>, EP: ep::Conversion<V>, T: t::Conversion<V>, EM: em::Conversion<V>>() {
+                Test::assert_approx_eq(&ElectricalMobility::new::<EM>(V::one()),
+                    &(Length::new::<L>(V::one())
+                        * Length::new::<L>(V::one())
+                        / ElectricPotential::new::<EP>(V::one())
+                        / Time::new::<T>(V::one())));
+            }
+        }
+    }
+}
diff --git a/src/si/mod.rs b/src/si/mod.rs
index 175cddf6..8822f83e 100644
--- a/src/si/mod.rs
+++ b/src/si/mod.rs
@@ -63,6 +63,7 @@ system! {
         electric_current::ElectricCurrent,
         electric_potential::ElectricPotential,
         electrical_conductance::ElectricalConductance,
+        electrical_mobility::ElectricalMobility,
         electrical_resistance::ElectricalResistance,
         energy::Energy,
         force::Force,