71.25 Rem to Px – Full Calculation Guide

71.25 rem equals 1140 pixels (px), assuming the browser’s root font size is 16px.

Converting rem to px involves multiplying the rem value by the root font size in pixels. Since 1 rem is equal to 16 px by default in most browsers, 71.25 rem multiplied by 16 px gives the pixel equivalent.

Conversion Tool

Enter value in rem:

Result in px:

Conversion Formula

The formula to convert rem units to pixels is simple: multiply the rem value by the root font size in pixels.

1 rem = root font size (usually 16 px). Therefore,

px = rem × 16

Why it works: rem units are relative to the root element’s font size. Browsers set the root font size at 16 px by default, so multiplying by 16 converts rem into absolute pixel units.

Step-by-step for 71.25 rem:

Start with rem value: 71.25
Multiply by 16 (default root font size): 71.25 × 16
Calculate: 1140 px

Conversion Example

Convert 12.5 rem to px:
- Take 12.5 rem
- Multiply by 16: 12.5 × 16 = 200 px
- Result is 200 pixels
Convert 8 rem to px:
- 8 rem × 16 = 128 px
Convert 0.75 rem to px:
- 0.75 × 16 = 12 px
Convert 20 rem to px:
- 20 × 16 = 320 px
Convert 50 rem to px:
- 50 × 16 = 800 px

Conversion Chart

The table below shows rem values from 46.2 to 96.2 and their pixel equivalents. To use, find the rem value in the left column and see the corresponding pixels on the right, which is the rem multiplied by 16.

Rem	Px
46.2	739.2
50.0	800.0
55.5	888.0
60.0	960.0
65.7	1051.2
70.0	1120.0
75.3	1204.8
80.0	1280.0
85.6	1369.6
90.0	1440.0
96.2	1539.2

Conversion Definitions

rem: The rem unit means “root em” and measures length relative to the root element’s font size in a webpage, typically the <html> element. It scales proportionally when root font size changes, allowing consistent sizing across different devices and user settings.

px: The pixel (px) is a fixed, absolute unit representing a single dot on the screen. It is device-dependent but usually corresponds to one physical pixel or a density-independent pixel on high-DPI screens, providing precise control over layout and design.

Conversion FAQs

Does changing browser default font size affect rem to px conversion?

Yes, rem units scale based on the root font size set in the browser or CSS. If a user increases default font size from 16px to 20px, then 1 rem equals 20 px, so 71.25 rem becomes 1425 px instead of 1140 px. This dynamic scaling helps accessibility but requires careful design consideration.

Can rem and px units be used interchangeably in CSS?

While both define sizes, px is absolute and rem is relative. Using rem allows responsive scaling when root font size changes, while px stays fixed. They can’t be interchanged without affecting design behavior, so choose based on whether fixed or scalable sizing is preferred.

Why might the pixel value look different on various devices for the same rem value?

Devices have different screen densities and scaling factors. Although rem to px conversion multiplies by root font size, device pixel ratio affects how many physical pixels map to one CSS pixel. This causes apparent size differences despite consistent CSS units.

How to change root font size to affect rem conversions?

The root font size can be adjusted in CSS by targeting the <html> selector, for example: html { font-size: 18px; }. This changes the base for all rem calculations, so rem values scale accordingly, affecting layout and typography sizes sitewide.

Is there a way to convert rem to px without knowing root font size?

No, since rem depends on root font size, you must know it to convert accurately. If unknown, assuming 16px is standard, but custom styles or user settings can change it. Inspecting computed styles in browser developer tools reveals the actual root font size.