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Convert None (base unit) to Yotta

None (base unit) (—) 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.

The numeric value you want to convert. Decimals are accepted.

Result

1 — = 1E-24 Y

1 None (base unit) = 1E-24 Yotta

1 Yotta = 1E+24 None (base unit)

1 — in every supported prefix

Conversion chart: None (base unit) to Yotta

Conversion table

None (base unit) (—) Yotta (Y)
0.01 — 1E-26 Y
0.1 — 1E-25 Y
1 — 1E-24 Y
2 — 2E-24 Y
3 — 3E-24 Y
5 — 5E-24 Y
10 — 1E-23 Y
20 — 2E-23 Y
50 — 5E-23 Y
100 — 1E-22 Y
1000 — 1E-21 Y

None (base unit) (—)

Definition: The unprefixed base value — a multiplier of exactly 1, representing a quantity with no SI prefix attached at all (e.g. a plain gram, meter, or watt rather than a kilogram, kilometer, or milliwatt).

History: This isn't a historical unit in its own right — it's simply the reference point the entire SI prefix ladder is built around, against which every prefix above and below is defined as a power of ten.

Current use: Used as the baseline whenever a quantity is expressed without any prefix, and as the anchor point for converting any other prefix on this page to any other.

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 None (base unit) → Yotta: multiply by 1E-24. For example, 1 — × 1E-24 = 1E-24 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 — equals 1E-24 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 None (base unit)?

1 None (base unit) (—) equals exactly 1E-24 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 None (base unit) to Other Prefixes

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

Possible Prefix Conversions

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

See also