Convert Peta to Femto

Peta (P) to Femto (f) 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+30 f

1 Peta = 1E+30 Femto

1 Femto = 1E-30 Peta

1 P in every supported prefix

Conversion chart: Peta to Femto

Conversion table

Peta (P)	Femto (f)
0.01 P	1E+28 f
0.1 P	1E+29 f
1 P	1E+30 f
2 P	2E+30 f
3 P	3E+30 f
5 P	5E+30 f
10 P	1E+31 f
20 P	2E+31 f
50 P	5E+31 f
100 P	1E+32 f
1000 P	1E+33 f

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.

Femto (f)

Definition: An SI prefix denoting a factor of 10⁻¹⁵ — one quadrillionth of the base unit. From the Danish/Norwegian 'femten' (fifteen).

History: Adopted by the CGPM in 1964, one of the first prefixes named after a Scandinavian numeral rather than a Greek or Latin root.

Current use: Used in nuclear and particle physics (femtometers describe the scale of atomic nuclei) and ultrafast laser physics (femtosecond pulses).

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 → Femto: multiply by 1E+30. For example, 1 P × 1E+30 = 1E+30 f.

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+30 f. 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 Femto are in 1 Peta?

1 Peta (P) equals exactly 1E+30 Femto (f).

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

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