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Convert None (base unit) to Peta

None (base unit) (—) to Peta (P) 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-15 P

1 None (base unit) = 1E-15 Peta

1 Peta = 1E+15 None (base unit)

1 — in every supported prefix

Conversion chart: None (base unit) to Peta

Conversion table

None (base unit) (—) Peta (P)
0.01 — 1E-17 P
0.1 — 1E-16 P
1 — 1E-15 P
2 — 2E-15 P
3 — 3E-15 P
5 — 5E-15 P
10 — 1E-14 P
20 — 2E-14 P
50 — 5E-14 P
100 — 1E-13 P
1000 — 1E-12 P

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.

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.

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) → Peta: multiply by 1E-15. For example, 1 — × 1E-15 = 1E-15 P.

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-15 P. 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 Peta are in 1 None (base unit)?

1 None (base unit) (—) equals exactly 1E-15 Peta (P).

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

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

See also