diff --git a/package.json b/package.json
index f18ca7e..7657903 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "postcss-preset-mantine",
-  "version": "1.10.0",
+  "version": "1.11.0",
   "description": "PostCSS preset for Mantine (7.0+) applications",
   "main": "dist/preset.js",
   "types": "dist/index.d.ts",
diff --git a/src/converters.ts b/src/converters.ts
new file mode 100644
index 0000000..b9d1ef9
--- /dev/null
+++ b/src/converters.ts
@@ -0,0 +1,95 @@
+function scaleRem(remValue: string) {
+  return `calc(${remValue} * var(--mantine-scale))`;
+}
+
+function createConverter(units: string, { shouldScale = false } = {}) {
+  function converter(value: unknown): string {
+    if (value === 0 || value === '0') {
+      return '0';
+    }
+
+    if (typeof value === 'number') {
+      const val = `${value / 16}${units}`;
+      return shouldScale ? scaleRem(val) : val;
+    }
+
+    if (typeof value === 'string') {
+      if (value.startsWith('calc(') || value.startsWith('var(')) {
+        return value;
+      }
+
+      if (value.includes(' ')) {
+        return value
+          .split(' ')
+          .map((val) => converter(val))
+          .join(' ');
+      }
+
+      if (value.includes(units)) {
+        return shouldScale ? scaleRem(value) : value;
+      }
+
+      const replaced = value.replace('px', '');
+      if (!Number.isNaN(Number(replaced))) {
+        const val = `${Number(replaced) / 16}${units}`;
+        return shouldScale ? scaleRem(val) : val;
+      }
+    }
+
+    return value as string;
+  }
+
+  return converter;
+}
+
+const rem = createConverter('rem', { shouldScale: true });
+const remNoScale = createConverter('rem');
+const em = createConverter('em');
+
+function getTransformedScaledValue(value: unknown) {
+  if (typeof value !== 'string' || !value.includes('var(--mantine-scale)')) {
+    return value;
+  }
+
+  return value
+    .match(/^calc\((.*?)\)$/)?.[1]
+    .split('*')[0]
+    .trim();
+}
+
+function px(value: unknown) {
+  const transformedValue = getTransformedScaledValue(value);
+
+  if (typeof transformedValue === 'number') {
+    return transformedValue;
+  }
+
+  if (typeof transformedValue === 'string') {
+    if (transformedValue.includes('calc') || transformedValue.includes('var')) {
+      return transformedValue;
+    }
+
+    if (transformedValue.includes('px')) {
+      return Number(transformedValue.replace('px', ''));
+    }
+
+    if (transformedValue.includes('rem')) {
+      return Number(transformedValue.replace('rem', '')) * 16;
+    }
+
+    if (transformedValue.includes('em')) {
+      return Number(transformedValue.replace('em', '')) * 16;
+    }
+
+    return Number(transformedValue);
+  }
+
+  return NaN;
+}
+
+module.exports = {
+  px,
+  em,
+  rem,
+  remNoScale,
+};
diff --git a/src/postcss-rem-em.ts b/src/postcss-rem-em.ts
index 21ef27d..d33ecde 100644
--- a/src/postcss-rem-em.ts
+++ b/src/postcss-rem-em.ts
@@ -1,52 +1,5 @@
 import type { AtRule, Root } from 'postcss';
-
-function scaleRem(remValue: string) {
-  return `calc(${remValue} * var(--mantine-scale))`;
-}
-
-function createConverter(units: string, { shouldScale = false } = {}) {
-  function converter(value: unknown): string {
-    if (value === 0 || value === '0') {
-      return '0';
-    }
-
-    if (typeof value === 'number') {
-      const val = `${value / 16}${units}`;
-      return shouldScale ? scaleRem(val) : val;
-    }
-
-    if (typeof value === 'string') {
-      if (value.startsWith('calc(') || value.startsWith('var(')) {
-        return value;
-      }
-
-      if (value.includes(' ')) {
-        return value
-          .split(' ')
-          .map((val) => converter(val))
-          .join(' ');
-      }
-
-      if (value.includes(units)) {
-        return shouldScale ? scaleRem(value) : value;
-      }
-
-      const replaced = value.replace('px', '');
-      if (!Number.isNaN(Number(replaced))) {
-        const val = `${Number(replaced) / 16}${units}`;
-        return shouldScale ? scaleRem(val) : val;
-      }
-    }
-
-    return value as string;
-  }
-
-  return converter;
-}
-
-const rem = createConverter('rem', { shouldScale: true });
-const remNoScale = createConverter('rem');
-const em = createConverter('em');
+const converters = require('./converters');
 
 const getRegExp = (units: 'rem' | 'em') => new RegExp('\\b' + units + '\\(([^()]+)\\)', 'g');
 const emRegExp = getRegExp('em');
@@ -57,15 +10,17 @@ module.exports = () => {
     postcssPlugin: 'postcss-rem-em',
 
     Once(root: Root) {
-      root.replaceValues(remRegExp, { fast: `rem(` }, (_, values) => rem(values));
-      root.replaceValues(emRegExp, { fast: `em(` }, (_, values) => em(values));
+      root.replaceValues(remRegExp, { fast: `rem(` }, (_, values) => converters.rem(values));
+      root.replaceValues(emRegExp, { fast: `em(` }, (_, values) => converters.em(values));
     },
 
     AtRule: {
       media: (atRule: AtRule) => {
         atRule.params = atRule.params
-          .replace(remRegExp, (value) => remNoScale(value.replace(/rem\((.*?)\)/g, '$1')))
-          .replace(emRegExp, (value) => em(value.replace(/em\((.*?)\)/g, '$1')));
+          .replace(remRegExp, (value) =>
+            converters.remNoScale(value.replace(/rem\((.*?)\)/g, '$1'))
+          )
+          .replace(emRegExp, (value) => converters.em(value.replace(/em\((.*?)\)/g, '$1')));
       },
     },
   };
diff --git a/src/preset.ts b/src/preset.ts
index 3d86510..a283a11 100644
--- a/src/preset.ts
+++ b/src/preset.ts
@@ -2,6 +2,7 @@ const nested = require('postcss-nested');
 const mixins = require('postcss-mixins');
 const remEm = require('./postcss-rem-em');
 const lightDark = require('./postcss-light-dark');
+const converters = require('./converters');
 
 function colorSchemeMixin(colorScheme: 'light' | 'dark') {
   return {
@@ -56,6 +57,18 @@ const notLtrMixin = {
   },
 };
 
+const smallerThanMixin = (_mixin: string, breakpoint: string) => ({
+  [`@media (max-width: ${converters.em(converters.px(breakpoint) - 0.1)})`]: {
+    '@mixin-content': {},
+  },
+});
+
+const largerThanMixin = (_mixin: string, breakpoint: string) => ({
+  [`@media (min-width: ${converters.em(breakpoint)})`]: {
+    '@mixin-content': {},
+  },
+});
+
 module.exports = () => {
   return {
     postcssPlugin: 'postcss-preset-mantine',
@@ -74,6 +87,8 @@ module.exports = () => {
           ltr: ltrMixin,
           'not-rtl': notRtlMixin,
           'not-ltr': notLtrMixin,
+          'smaller-than': smallerThanMixin,
+          'larger-than': largerThanMixin,
         },
       }),
     ],
diff --git a/src/tests/__snapshots__/smaller-larget-than.test.ts.snap b/src/tests/__snapshots__/smaller-larget-than.test.ts.snap
new file mode 100644
index 0000000..393b112
--- /dev/null
+++ b/src/tests/__snapshots__/smaller-larget-than.test.ts.snap
@@ -0,0 +1,21 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`larger-than it transforms larger-than mixin correctly 1`] = `
+"
+@media (min-width: 20em) {
+.a {
+    background: red
+}
+}
+"
+`;
+
+exports[`smaller-than it transforms smaller-than mixin correctly 1`] = `
+"
+@media (max-width: 19.99375em) {
+.a {
+    background: red
+}
+}
+"
+`;
diff --git a/src/tests/smaller-larget-than.test.ts b/src/tests/smaller-larget-than.test.ts
new file mode 100644
index 0000000..eae7922
--- /dev/null
+++ b/src/tests/smaller-larget-than.test.ts
@@ -0,0 +1,31 @@
+import { testTransform } from './utils';
+
+const smallerThanInput = `
+.a {
+  @mixin smaller-than 320px {
+    background: red;
+  }
+}
+`;
+
+const largerThanInput = `
+.a {
+  @mixin larger-than 320px {
+    background: red;
+  }
+}
+`;
+
+describe('smaller-than', () => {
+  it('it transforms smaller-than mixin correctly', async () => {
+    const res = await testTransform(smallerThanInput);
+    expect(res.css).toMatchSnapshot();
+  });
+});
+
+describe('larger-than', () => {
+  it('it transforms larger-than mixin correctly', async () => {
+    const res = await testTransform(largerThanInput);
+    expect(res.css).toMatchSnapshot();
+  });
+});