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Typography Unit Converter

Convert type sizes between px, pt, em, rem, pica, mm, and more.

Used for em, rem, and percent.

Used for pt, pica, mm, cm, and in.

Decimal places4
  • Pixels
    px
    16
  • Points
    pt
    12
  • Picas
    pc
    1
  • Millimetres
    mm
    4.2333
  • Centimetres
    cm
    0.4233
  • Inches
    in
    0.1667
  • Em
    em
    1
  • Root em
    rem
    1
  • Percent
    %
    100

How to convert typography units

  1. Enter a value

    Type the size you want to convert into the value field and pick its unit.

  2. Set your context

    Enter the base font size in pixels and the DPI so em, rem, percent, and physical units resolve correctly.

  3. Read every conversion

    See the equivalent in all other typography units update live as you type.

  4. Copy what you need

    Copy a single row or copy all conversions at once with the button below.

Why use this tool

Every unit at once

One value converts to px, pt, pica, mm, cm, in, em, rem, and percent simultaneously.

Context aware

Em, rem, and percent follow your base font size, while pt, pica, mm, cm, and in follow your DPI, so results match your real setup.

Adjustable precision

Slide the decimal places from 0 to 8 to match the accuracy your design or print work needs.

Copy one or all

Copy any single conversion or grab the whole list in one tap for pasting into a stylesheet or spec.

Runs entirely on your device

Values are converted locally as you type. Nothing is uploaded or stored.

About this tool

The typography unit converter restates a single type size across every common unit at once. Enter a value, pick its unit, and pixels, points, picas, millimetres, centimetres, inches, em, rem, and percent all appear together. It is built for designers and developers who move between screen units, print units, and relative units.

Two context inputs make the results accurate for your setup. The base font size in pixels drives the relative units: em, rem, and percent are all measured against it, so at a 16 px base, 1 em, 1 rem, and 100 percent each equal 16 px. The DPI drives the physical and print units: points, picas, millimetres, centimetres, and inches are all derived from it, with the common web default of 96 DPI meaning 1 inch is 96 px and 1 point is one seventy-second of an inch. Change either input and the affected rows recompute immediately.

Every value is first converted to pixels, the base of the conversion, then restated in each target unit so the whole set stays consistent. Points and picas come from traditional print, where 12 points make one pica and 72 points make one inch. Em and rem are the relative units that keep responsive layouts scalable. Very large and very small numbers are shown in scientific notation, and you control the number of decimal places.

Non-numeric input and a base font size or DPI of zero show a short hint instead of a broken result. For related conversions, try the cm to inches tool, the aspect ratio calculator, or the everyday unit converter.

Frequently asked questions

How many pixels is one point?
At the common web default of 96 DPI, one point equals 96 divided by 72, which is about 1.333 pixels. Change the DPI input and the point conversion updates to match.
How do em and rem relate to pixels?
Em and rem are measured against the base font size you enter. At a 16 px base, 1 em and 1 rem both equal 16 px, and 1.5 rem equals 24 px. Percent works the same way, so 100 percent equals the base size.
Why do I need to set a DPI?
The physical and print units, points, picas, millimetres, centimetres, and inches, depend on how many pixels fit in an inch. Web work usually uses 96 DPI, but print and high-density screens differ, so the input lets you match your target.
What is the difference between em and rem?
In this converter both are computed from the single base font size you provide, so they show the same pixel value. In a real stylesheet, em can also inherit from a parent element while rem always uses the root size.
Is my input sent anywhere?
No. Every conversion happens on your device as you type. Nothing you enter is uploaded, logged, or stored.

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