Pixel to Point (pt)

Convert pixels to typographic points (pt) using a DPI setting for print typography.

What Pixel to Point (pt) helps you do

Convert pixels to typographic points using a DPI setting. Points are a print typography unit where 72 points equal one inch, so the pixel-to-point ratio depends on the density you enter. At 72 DPI the numbers match one to one, which is where the familiar rule of thumb comes from.

The conversion is done in your browser. Haivix never sees your values.

How it works

These converters apply a fixed factor or formula to the value you enter, inside the page. They do not fetch live rates, measurement standards or device data, so the result depends only on the number and the units you choose. Values are formatted to a handful of decimals, with scientific notation for very small or very large results. Where a formula needs a second input, such as voltage, hours or a power factor, the page asks for it rather than assuming a value. The factor itself comes from the unit definition, so it is the same today as it will be next year; only the input changes.

How to use Pixel to Point (pt)

  1. Enter the pixel size and set the DPI or PPI the design targets.
  2. Read the equivalent value in points.
  3. Compare with the common rule of thumb that 1pt is 1px at 72 DPI.
  4. Check the result against a print style guide.

When to use it

  • Translate a pixel font size sampled from a screenshot into points for a print style guide.
  • Check a line weight expressed in pixels against a point-based spec.
  • Convert UI measurements to points when preparing a document for print.
  • Read a PDF measurement in points from a pixel mockup.
  • Compare a print type size with a screen type size.
  • Convert a border width for a print-ready layout.

When not to use it

  • Do not assume 1px equals 1pt on a 96 DPI screen.
  • Do not use points to size CSS text; CSS uses px, rem or em.
  • Do not treat the conversion as a font metric; it is a unit conversion.

Example

At 72 DPI, 12 pixels is 12 points. At 96 DPI, 16 pixels is 12 points, because 16 times 72 divided by 96 equals 12. At 96 DPI, 24 pixels is 18 points. At 300 DPI, 300 pixels is 72 points, or one inch.

What you can do with Pixel to Point (pt)

  • Convert pixels to points at any DPI.
  • Show the result with up to six decimals.
  • Handle fractional pixel sizes.
  • Keep the pixel value and density visible.
  • Copy the point value.
  • Run the conversion locally with no upload.

Example: check the unit before trusting the number

Confirm the source unit and the target unit before reading the result. A correct number in the wrong unit is the most common conversion mistake, especially between US and imperial measures.

Sanity-check the magnitude with a rough mental estimate. If kilometres should be larger than miles and the result is smaller, the direction is reversed.

Round the result for the destination. A calculator can show six decimals, but an invoice, label or form usually needs two or three, and the rounding rule may be specified.

Keep the original value and unit in your notes. If the destination rejects the result, the source is the only way to recompute without guessing what was entered.

Check whether the unit has regional variants. Gallons, pints, tons and acres all have more than one definition, and picking the wrong one can shift the result by several percent without any arithmetic error.

If the answer will drive a purchase, a dose or a safety decision, verify it against a second source or the manufacturer's own table. A calculator removes arithmetic mistakes, not definition mistakes.

What to know before you start

  • The classic 1pt equals 1px rule only holds at 72 DPI; other densities change the result.
  • Points are a print unit and are not a reliable way to size screen elements.
  • It does not account for font-specific metrics such as cap height or leading.
  • The displayed result is rounded to a limited number of decimals.

Common mistakes

  • Applying the 1:1 rule at 96 DPI.
  • Multiplying by 72 without dividing by the density.
  • Confusing points with pixels in a CSS file.
  • Using a screen density for a print document.

Troubleshooting

If the point value is much larger than expected, the DPI may be set to 72 for a higher-density source.

If points and pixels match, the density is 72.

If a PDF disagrees, confirm the document's own measurement units.

If the value is fractional, that is expected for non-integer densities.

Related standards and documentation

  • The SI Brochure defines the metric base units and their relationships.
  • NIST SP 811 documents conversion factors for US customary units.
  • A US gallon and an imperial gallon are different volumes; confirm which one a recipe or specification uses.
  • ISO 80000 quantities and units is the reference for unit names and symbols in technical writing.
A factor, not a measurement
  • Check the units, not only the number.
  • Estimate the magnitude first.
  • Round for the destination.
  • Watch for regional unit variants.

Frequently Asked Questions