Tailwind CSS Unit Reference
Understand how Tailwind CSS sizing classes map to pixel and rem values for precise implementation.
Context (affects rem/em/vw/vh/%)
Common pixel sizes β rem (at 16px base)
Tailwind CSS tips
Tailwind's default base is 16px. Its 4-point spacing system means 1 unit = 0.25rem = 4px. Set the base to 16 and enter 4 to see text-xs: 0.75rem = 12px.
Tailwind text sizes: text-xs (12px/0.75rem), text-sm (14px/0.875rem), text-base (16px/1rem), text-lg (18px/1.125rem), text-xl (20px/1.25rem).
Tailwind spacing: p-4 = 1rem = 16px, p-6 = 1.5rem = 24px, p-8 = 2rem = 32px. Use this tool to verify any class's pixel equivalent quickly.
When extending Tailwind with custom sizes in tailwind.config.js, define them in rem for consistency: fontSize: { "2xs": "0.625rem" } = 10px at 16px base.
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