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

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