Convert Peta to Yotta

Peta (P) 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 P = 1E-09 Y

1 Peta = 1E-09 Yotta

1 Yotta = 1E+09 Peta

1 P in every supported prefix

Conversion chart: Peta to Yotta

Conversion table

Peta (P)	Yotta (Y)
0.01 P	1E-11 Y
0.1 P	1E-10 Y
1 P	1E-09 Y
2 P	2E-09 Y
3 P	3E-09 Y
5 P	5E-09 Y
10 P	1E-08 Y
20 P	2E-08 Y
50 P	5E-08 Y
100 P	1E-07 Y
1000 P	1E-06 Y

Peta (P)

Definition: An SI prefix denoting a factor of 10¹⁵ — a quadrillion times the base unit.

History: Adopted by the CGPM in 1975 as part of the same extension that introduced exa-, tera having already proven insufficient for emerging large-scale scientific quantities.

Current use: Widely used in computing (petabytes of storage, petaflops of processing power) and in physics for large energy and frequency quantities.

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 Peta → Yotta: multiply by 1E-09. For example, 1 P × 1E-09 = 1E-09 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 P equals 1E-09 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 Peta?

1 Peta (P) equals exactly 1E-09 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 Peta to Other Prefixes

Possible Prefix Conversions

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