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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

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

See also