Font Size Converter Calculator

Work out font size converter instantly with clear inputs, formula shown and shareable results.

About Font Size Converter Calculator

Each typographic size unit is defined as a multiple of the point, so the conversion runs in two steps: multiply by the source unit's factor to reach point, then divide by the target unit's factor. One factor per unit covers every pair in the list. A CSS pixel is 1/96 inch and a point 1/72 inch, so 16 px is exactly 12 pt. Em and rem depend on the base font size, taken as 16 px here.

Formulas

Two-step conversion

result = value × factor(from) ÷ factor(to)

Base value

base (point) = value × factor(from)

Worked example

With the default values below, Font Size Converter Calculator returns Converted Value of 12.000000. Change any input above and every figure here is recalculated in your browser.

Inputs used

Value: 16
From unitone of Point (pt, 1/72 in), CSS pixel (px, 1/96 in), Pica (12 pt), Inch, Millimetre, Em (at a 16 px base), Root em (at a 16 px base): CSS pixel (px, 1/96 in)
To unitone of Point (pt, 1/72 in), CSS pixel (px, 1/96 in), Pica (12 pt), Inch, Millimetre, Em (at a 16 px base), Root em (at a 16 px base): Point (pt, 1/72 in)

Results

Converted Value: 12.000000
Result Unit: Point (pt, 1/72 in)
Value in point (base): 12.000000
Multiplier Applied: 0.75000000

Step by step

1Values used
2Two-step conversion
3Base value
4Converted Value= 12.000000
5Result Unit= Point (pt, 1/72 in)
6Value in point (base)= 12.000000
7Multiplier Applied= 0.75000000

Assumptions and limits

The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 8 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Why route through point?

With 7 units, direct pairs would mean 42 factors to maintain. Going via point needs one factor per unit and gives the same answer.

Does the dropdown order matter?

Yes. The first is the unit your figure is already in; the second is what you want it in. Swapping them inverts the result.