Convert Exa to Yotta

Exa (E) to Yotta (Y) SI prefix conversion — enter any value below to get an instant result, or use the table for common values.

Results from this calculator are estimates provided for general informational purposes only, based on formulas, rates, and standards commonly accepted as of 2026. Figures may differ slightly from other calculators or professional sources due to rounding methods, differing assumptions, or regional regulations, and rules may change over time. Always consult a qualified professional — such as a financial advisor, healthcare provider, or other relevant specialist — before making decisions based on these results.

Value

From

Result

1 E = 1E-06 Y

1 Exa = 1E-06 Yotta

1 Yotta = 1000000 Exa

1 E in every supported prefix

Conversion chart: Exa to Yotta

Conversion table

Exa (E)	Yotta (Y)
0.01 E	1E-08 Y
0.1 E	1E-07 Y
1 E	1E-06 Y
2 E	2E-06 Y
3 E	3E-06 Y
5 E	5E-06 Y
10 E	1E-05 Y
20 E	2E-05 Y
50 E	5E-05 Y
100 E	0.0001 Y
1000 E	0.001 Y

Exa (E)

Definition: An SI prefix denoting a factor of 10¹⁸ — a quintillion times the base unit.

History: Adopted by the CGPM in 1975, at a time when the largest practical prefixes needed to keep pace with growing quantities in physics and, later, computing.

Current use: Common in describing large-scale computing performance (exaflops) and total global data storage and traffic figures (exabytes).

Yotta (Y)

Definition: The largest classical SI prefix, denoting a factor of 10²⁴ — a septillion (in the short-scale system) times the base unit.

History: Adopted by the CGPM (Conférence Générale des Poids et Mesures) in 1991, extending the SI prefix table to cover the enormous data and astrophysical quantities that had begun to exceed the existing exa- prefix.

Current use: Used to express extremely large quantities such as global data-storage totals (yottabytes) and some astrophysical mass and energy figures.

Supported Units

Prefix	Symbol	Multiplier (× base)
Yotta	Y	1E+24
Zetta	Z	1E+21
Exa	E	1E+18
Peta	P	1E+15
Tera	T	1E+12
Giga	G	1E+09
Mega	M	1000000
Kilo	k	1000
Hecto	h	100
Deka	da	10
None (base unit)	—	1
Deci	d	0.1
Centi	c	0.01
Milli	m	0.001
Micro	µ	1E-06
Nano	n	1E-09
Pico	p	1E-12
Femto	f	1E-15
Atto	a	1E-18
Zepto	z	1E-21
Yocto	y	1E-24

About These Parameters

Value: The number of "From" prefix units you want to re-express in the "To" prefix. Since prefixes are just multiplier scales, this value can represent anything from a physical quantity's leading digits to a plain abstract number.
From Unit: The SI prefix your value is currently scaled by — for example, the "kilo" in "kilogram" or the "nano" in "nanosecond," entered here without the base unit attached.
To Unit: The SI prefix you want the value re-expressed in. Use the swap button to flip From and To instantly, handy when converting a datasheet figure from one prefix scale to another.

How Prefix Conversion Works

The Formula

Every SI prefix is defined by a fixed power-of-ten multiplier relative to the unprefixed base value. To convert a value from one prefix scale to another:

result = value × (multiplier of "From" prefix ÷ multiplier of "To" prefix)

For Exa → Yotta: multiply by 1E-06. For example, 1 E × 1E-06 = 1E-06 Y.

A History of Powers of Ten

The original six metric prefixes — kilo, hecto, deka, deci, centi, milli — were adopted by the French Academy of Sciences in 1795 alongside the metric system itself. As science and industry needed to describe ever-larger and ever-smaller quantities, the CGPM (Conférence Générale des Poids et Mesures) extended the table repeatedly: mega and micro in 1960 when the modern SI was formalized, giga and nano the same year, tera and pico following soon after, then peta/femto (1975), exa/atto (1975), and finally zetta/zepto and yotta/yocto in 1991 — the classical range covered on this page. In 2022 the CGPM went further still, adding ronna/ronto and quetta/quecto to keep pace with data-storage and astrophysical quantities that had begun to outgrow even yotta.

Why a Prefix-Only Converter Is Useful

Every other unit converter on this site attaches these same prefixes to one specific base unit — grams, watts, bytes, farads — because that's how the prefix is actually used in practice. But the underlying math of "how much bigger is giga than mega" never changes no matter which unit it's modifying, so it's often faster to reason about the prefix scale on its own: quickly checking that a "giga" figure is a billion and not a million, or converting a "nano" measurement from one datasheet into the "micro" scale used by a different one, without needing to know or care what physical quantity either figure describes.

Example

1 E equals 1E-06 Y. Whatever base unit these prefixes are actually attached to — grams, bytes, watts, seconds — the same multiplier ratio applies: 1 kilo- is always 1,000 times 1 (unprefixed), and 1 mega- is always 1,000 times 1 kilo-, regardless of the quantity being measured.

Frequently Asked Questions

How many Yotta are in 1 Exa?

1 Exa (E) equals exactly 1E-06 Yotta (Y).

Is giga a billion or a million?

Giga is always a billion (10⁹) times the base unit — a common point of confusion is with "mega," which is a million (10⁶). The two are frequently mixed up in casual conversation about data storage and computing speed, which is exactly the kind of mistake this converter is designed to catch.

Does this converter work for any unit, like grams or bytes?

Yes — this converter deliberately ignores the underlying unit and works purely with the multiplier scale. "1 kilo- to mega-" gives the same ratio (0.001) whether you mentally attach it to grams, watts, bytes, or any other quantity, because the prefix's multiplier is independent of what it's modifying.

What does "None (base unit)" mean in the unit list?

"None (base unit)" represents a value with no prefix attached at all — a plain gram, meter, or watt rather than a kilogram, kilometer, or milliwatt. It's included so you can convert directly between an unprefixed value and any prefixed scale, such as figuring out how many kilo- units equal one plain (unprefixed) unit.

Are ronna, ronto, quetta, and quecto included here?

Not yet — this page covers the classical SI prefix range from yotta (10²⁴) down to yocto (10⁻²⁴), which was complete from 1991 until 2022. The newer 2022 additions (ronna/ronna-, quetta/quecto) sit beyond even yotta and yocto and aren't included in this table.

Convert Exa to Other Prefixes

Possible Prefix Conversions

Centi to Nano Milli to Mega Deka to Pico Deka to Giga Atto to Centi Giga to Nano Yotta to None (base unit) Peta to Milli Yotta to Nano Tera to Micro Hecto to Mega Peta to Deci None (base unit) to Kilo Zepto to Centi None (base unit) to Pico Zetta to Peta Peta to None (base unit) Zepto to Kilo Mega to Pico Centi to None (base unit) Kilo to Peta Micro to Deci Kilo to Tera None (base unit) to Yotta Yotta to Pico Deka to Yocto Peta to Hecto Atto to Micro Atto to Femto Tera to Peta Exa to Peta Pico to Atto Yotta to Centi Micro to Zetta Deci to None (base unit) Zetta to Kilo Pico to Giga Milli to Femto Tera to Yotta Micro to Milli Zetta to Yotta Hecto to Nano Centi to Pico Centi to Micro Nano to Exa Milli to Centi Exa to None (base unit) Hecto to Centi Zetta to Femto Femto to Yotta Milli to Zepto Hecto to None (base unit) Hecto to Exa Atto to Hecto Giga to Yocto Peta to Nano Tera to Centi Pico to Femto Mega to Atto Deka to Milli Kilo to Femto Atto to Zetta Exa to Zepto Femto to Yocto Yotta to Atto Peta to Pico Deka to Zepto Mega to Yotta Giga to Pico Peta to Mega Giga to Femto Zetta to Atto Milli to Peta Micro to Tera Peta to Zetta Atto to Yotta Mega to Giga Milli to Pico Giga to Milli Yocto to Mega Giga to None (base unit) Peta to Centi Nano to Milli Atto to Deci Mega to Kilo Zetta to Mega Deci to Milli Deci to Pico Centi to Yocto Femto to Nano Atto to Exa Peta to Zepto Zetta to Micro Tera to Exa Zepto to Atto Tera to Pico Deci to Tera Zepto to Deka None (base unit) to Yocto Femto to Peta Atto to Yocto Yotta to Deci Deka to None (base unit) Zetta to Zepto Deci to Deka Nano to Deka Mega to Milli Giga to Hecto Deka to Deci Nano to Atto Zetta to Deka Pico to Yotta None (base unit) to Hecto Yocto to Exa None (base unit) to Zepto Kilo to Deci None (base unit) to Milli Nano to Yotta Deci to Yotta Kilo to Giga Nano to Zepto Zepto to None (base unit) Femto to None (base unit) Pico to Zepto Exa to Mega Milli to Tera Milli to Deka Zepto to Nano None (base unit) to Femto Zetta to Deci Pico to Tera Femto to Zetta Femto to Atto Exa to Kilo Yotta to Peta Exa to Femto Yocto to Micro Deci to Zetta Pico to Mega Exa to Centi Yotta to Tera Nano to Deci Micro to Centi Yotta to Milli Micro to Zepto Zetta to None (base unit) Yotta to Zetta Tera to Yocto Femto to Exa Tera to Zetta Femto to Mega Yocto to Pico Pico to Hecto Kilo to Milli Kilo to Atto Atto to Nano Yocto to Deka Pico to Milli Hecto to Kilo Giga to Peta Mega to Deci Pico to Kilo Atto to Giga Kilo to Hecto Centi to Atto Hecto to Yocto Giga to Kilo Deka to Micro Atto to None (base unit) Deci to Zepto Atto to Zepto Kilo to Mega Tera to Atto Hecto to Yotta Femto to Milli Milli to Atto Zetta to Centi Exa to Pico Yotta to Mega Tera to Femto Hecto to Deci Tera to Nano Mega to Deka Milli to Giga Micro to Peta Micro to Femto Milli to Nano Tera to Deka Yocto to Milli Milli to Exa Centi to Femto None (base unit) to Atto Milli to Zetta Zepto to Tera Milli to Yotta Yocto to None (base unit) Yotta to Micro Centi to Zetta Hecto to Milli Mega to Femto Deci to Kilo Yotta to Yocto Mega to Hecto Femto to Giga Femto to Deci Deka to Zetta Yotta to Femto Exa to Tera Deka to Kilo Deci to Atto Giga to Deci Pico to Deka Micro to Kilo Hecto to Zetta Deka to Nano Micro to Yocto Peta to Atto Tera to Kilo Centi to Tera Femto to Kilo Atto to Tera Micro to Giga Zepto to Yotta Yocto to Yotta Kilo to Pico Exa to Deka Hecto to Atto Micro to Yotta Kilo to Exa Zetta to Hecto None (base unit) to Exa Yotta to Deka Deci to Hecto Pico to Centi Hecto to Femto Deka to Centi Peta to Femto Atto to Milli Deci to Exa Centi to Deka Centi to Mega Yotta to Exa Yocto to Tera Nano to Giga Pico to None (base unit) Zepto to Peta Milli to None (base unit) Femto to Tera Yocto to Zetta Milli to Hecto Atto to Deka Zepto to Mega Kilo to Zepto Tera to Hecto Kilo to Deka Mega to Micro Deka to Mega Mega to Yocto Micro to Nano Zepto to Milli Giga to Centi Centi to Giga Zetta to Tera Pico to Deci Deka to Exa Femto to Micro Peta to Yotta Kilo to Yotta Yocto to Kilo Giga to Mega Deka to Atto None (base unit) to Centi Milli to Yocto Mega to None (base unit) Peta to Micro Yocto to Deci Tera to Giga Exa to Micro Femto to Deka Yocto to Nano Yocto to Zepto None (base unit) to Micro Giga to Atto Nano to Mega Zetta to Exa Hecto to Deka Mega to Centi Nano to Pico Mega to Exa Micro to Mega Hecto to Giga None (base unit) to Peta Exa to Yocto Milli to Kilo Exa to Zetta Yocto to Hecto Nano to Micro Zepto to Giga Centi to Exa Micro to Atto Nano to Yocto Nano to Peta Micro to Pico Mega to Tera Deci to Peta None (base unit) to Deka Micro to Hecto None (base unit) to Nano Exa to Giga Milli to Deci Deci to Yocto Yocto to Giga Tera to Milli Yotta to Hecto None (base unit) to Deci Pico to Yocto Pico to Exa Zetta to Yocto Atto to Kilo Nano to Tera None (base unit) to Tera Deci to Micro Zepto to Yocto Centi to Kilo Centi to Deci Exa to Milli Yotta to Giga Zepto to Hecto Hecto to Micro Giga to Tera Nano to Centi Peta to Deka Zetta to Milli Giga to Micro Atto to Pico Peta to Yocto Kilo to Nano Deci to Centi Deka to Peta Hecto to Pico Exa to Yotta Deci to Mega Deci to Femto Zepto to Micro Yocto to Peta Zetta to Giga Exa to Nano Kilo to Centi Peta to Tera Peta to Kilo Giga to Zepto Zepto to Pico Nano to None (base unit) Peta to Exa Deka to Femto None (base unit) to Giga Pico to Zetta Deci to Nano Femto to Hecto Yocto to Atto Hecto to Peta Zetta to Pico Deci to Giga Exa to Atto Mega to Zepto Kilo to Yocto Zetta to Nano Giga to Yotta Atto to Peta Pico to Micro Hecto to Zepto Centi to Peta Centi to Yotta Deka to Tera Tera to None (base unit) Giga to Zetta Centi to Milli Zepto to Zetta Nano to Hecto Pico to Nano Tera to Deci Kilo to None (base unit) Giga to Deka Nano to Zetta Tera to Mega Nano to Femto Micro to Exa None (base unit) to Mega Deka to Yotta Zepto to Femto Hecto to Tera Centi to Zepto Peta to Giga Atto to Mega Femto to Pico Femto to Zepto Mega to Zetta Yocto to Centi Tera to Zepto Zepto to Deci Centi to Hecto Kilo to Micro Yotta to Kilo Yotta to Zepto Kilo to Zetta Micro to Deka Exa to Deci Micro to None (base unit) Pico to Peta Zepto to Exa None (base unit) to Zetta Yocto to Femto Milli to Micro Giga to Exa Mega to Nano Mega to Peta Femto to Centi Deka to Hecto Exa to Hecto Nano to Kilo