How many Em (base 16px)s are in 1 Rem (base 16px)?

There are exactly 1 Em (base 16px)s in 1 Rem (base 16px). This means the conversion factor from Rem (base 16px) to Em (base 16px) is 1.

What is the formula to convert Rem (base 16px) to Em (base 16px)?

The formula to convert Rem (base 16px) to Em (base 16px) is: em = rem × 1. For example, to convert 10 Rem (base 16px)s to Em (base 16px)s, you would multiply 10 by 1.

What are the common uses of Rem (base 16px)?

The Rem (base 16px) is commonly used in radiation safety (US), dosimetry.

How do you convert Rem (base 16px) to Em (base 16px)?

To convert Rem (base 16px)s to Em (base 16px)s, multiply by 1 (or divide by 1). Therefore, 1 Rem (base 16px) (rem) equals 1 Em (base 16px)s (em).

Rem (base 16px) to Em (base 16px) Converter

Worked example: converting Rem (base 16px) to Em (base 16px)

Step 1 — start with the formula. em = rem × 1
Step 2 — substitute your figure. 10 rem × 1
Step 3 — read the result. 10 rem = 10 em
Step 4 — check it in reverse. rem = em × 1 returns 10 rem, which matches the figure you started with.

Typography Converter

6 units available

Decimals:

From

To

1

1 rem = 1 em

Formula:

em = rem × 1

With your value: 1 rem = 1 em

Other Rem (base 16px) to Em (base 16px) conversions

2 rem to em 3 rem to em 4 rem to em 5 rem to em 6 rem to em 7 rem to em 8 rem to em

Rem (base 16px) to Em (base 16px) Conversion Table

Rem (base 16px) (rem)	Em (base 16px) (em)
0.5	0.5
1	1
2	2
5	5
10	10
15	15
20	20
25	25
50	50
100	100
250	250
500	500
1000	1,000

Em (base 16px) to Rem (base 16px) Conversion Table

Em (base 16px) (em)	Rem (base 16px) (rem)
0.5	0.5
1	1
2	2
5	5
10	10
15	15
20	20
25	25
50	50
100	100
250	250
500	500
1000	1,000

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Rem (base 16px) (rem)

Typography

Conventional value

Based on the PostScript point of exactly 1/72 inch, which CSS also adopts for absolute lengths.

Source: PostScript Language Reference; CSS Values and Units Module Level 4 (absolute lengths)

Adobe Systems / W3C · Reviewed 2026-07-01

Em (base 16px) (em)

Typography

Conventional value

Based on the PostScript point of exactly 1/72 inch, which CSS also adopts for absolute lengths.

Source: PostScript Language Reference; CSS Values and Units Module Level 4 (absolute lengths)

Adobe Systems / W3C · Reviewed 2026-07-01

How to Convert Rem (base 16px) to Em (base 16px)

To convert from Rem (base 16px) (rem) to Em (base 16px) (em), multiply the value by 1.

Formula: em = rem × 1

Reverse: rem = em × 1

Step-by-Step Example

Start with your value in Rem (base 16px). For example: 5 rem
Multiply by the conversion factor: 5 x 1
The result is: 5 em

Rem (base 16px) and Em (base 16px) Relationship

This calculation facilitates standardized conversion between recognized units of typography. Because 1 rem equals 1 em, these two units represent equivalent physical quantities. Understanding the relationship between Rem (base 16px) and Em (base 16px) is essential for accurate calculations in physics, engineering, commerce, and daily applications.

About Rem (base 16px)

The rem is a non-SI unit of equivalent radiation dose. One rem is equal to 0.01 sievert.

Common uses of Rem (base 16px): radiation safety (US), dosimetry.

About Em (base 16px)

The em is a relative unit of measurement in typography, based on the current font size.

Common uses of Em (base 16px): web design, responsive typography.

Frequently Asked Questions

How many Em (base 16px)s are in 1 Rem (base 16px)?: There are exactly 1 Em (base 16px)s in 1 Rem (base 16px). This means the conversion factor from Rem (base 16px) to Em (base 16px) is 1.
What is the formula to convert Rem (base 16px) to Em (base 16px)?: The formula to convert Rem (base 16px) to Em (base 16px) is: em = rem × 1. For example, to convert 10 Rem (base 16px)s to Em (base 16px)s, you would multiply 10 by 1.
What is a Rem (base 16px)?: The rem is a non-SI unit of equivalent radiation dose. One rem is equal to 0.01 sievert.
What is a Em (base 16px)?: The em is a relative unit of measurement in typography, based on the current font size.
What are the common uses of Rem (base 16px)?: The Rem (base 16px) is commonly used in radiation safety (US), dosimetry.