diff --git a/lib/units/area.d4rt.units b/lib/units/area.d4rt.units
new file mode 100644
index 0000000..45382d1
--- /dev/null
+++ b/lib/units/area.d4rt.units
@@ -0,0 +1,12 @@
+[
+  {"name": "square meter", "symbol": "m²", "baseUnit": "square meter", "factor": 1},
+  {"name": "square kilometer", "symbol": "km²", "baseUnit": "square meter", "factor": 1000000},
+  {"name": "square centimeter", "symbol": "cm²", "baseUnit": "square meter", "factor": 0.0001},
+  {"name": "square millimeter", "symbol": "mm²", "baseUnit": "square meter", "factor": 0.000001},
+  {"name": "hectare", "symbol": "ha", "baseUnit": "square meter", "factor": 10000},
+  {"name": "acre", "symbol": "ac", "baseUnit": "square meter", "factor": 4046.8564224},
+  {"name": "square inch", "symbol": "in²", "baseUnit": "square meter", "factor": 0.00064516},
+  {"name": "square foot", "symbol": "ft²", "baseUnit": "square meter", "factor": 0.09290304},
+  {"name": "square yard", "symbol": "yd²", "baseUnit": "square meter", "factor": 0.83612736},
+  {"name": "square mile", "symbol": "mi²", "baseUnit": "square meter", "factor": 2589988.110336}
+]
diff --git a/lib/units/pressure.d4rt.units b/lib/units/pressure.d4rt.units
new file mode 100644
index 0000000..07d5eee
--- /dev/null
+++ b/lib/units/pressure.d4rt.units
@@ -0,0 +1,13 @@
+
+[
+  {"name": "pascal", "symbol": "Pa", "baseUnit": "pascal", "factor": 1},
+  {"name": "kilopascal", "symbol": "kPa", "baseUnit": "pascal", "factor": 1000},
+  {"name": "megapascal", "symbol": "MPa", "baseUnit": "pascal", "factor": 1000000},
+  {"name": "bar", "symbol": "bar", "baseUnit": "pascal", "factor": 100000},
+  {"name": "millibar", "symbol": "mbar", "baseUnit": "pascal", "factor": 100},
+  {"name": "atmosphere", "symbol": "atm", "baseUnit": "pascal", "factor": 101325},
+  {"name": "pound per square inch", "symbol": "psi", "baseUnit": "pascal", "factor": 6894.757},
+  {"name": "torr", "symbol": "Torr", "baseUnit": "pascal", "factor": 133.322},
+  {"name": "millimeter of mercury", "symbol": "mmHg", "baseUnit": "pascal", "factor": 133.322},
+  {"name": "kilograms per square meter", "symbol": "kg/m²", "baseUnit": "pascal", "factor": 9.80665}
+]