Convert Deka to Peta

Deka (da) 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.

Value

From

Result

1 da = 1E-14 P

1 Deka = 1E-14 Peta

1 Peta = 1E+14 Deka

1 da in every supported prefix

Conversion chart: Deka to Peta

Conversion table

Deka (da)	Peta (P)
0.01 da	1E-16 P
0.1 da	1E-15 P
1 da	1E-14 P
2 da	2E-14 P
3 da	3E-14 P
5 da	5E-14 P
10 da	1E-13 P
20 da	2E-13 P
50 da	5E-13 P
100 da	1E-12 P
1000 da	1E-11 P

Deka (da)

Definition: An SI prefix denoting a factor of 10¹ — ten times the base unit. Sometimes spelled 'deca', from the Greek 'deka' (ten).

History: One of the original six metric prefixes adopted in France in 1795, though it has always been among the least-used of the classical set.

Current use: Rarely seen outside specialized contexts, though 'dekagram' remains in everyday grocery use in parts of Central Europe for measuring small food quantities.

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 Deka → Peta: multiply by 1E-14. For example, 1 da × 1E-14 = 1E-14 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 da equals 1E-14 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 Deka?

1 Deka (da) equals exactly 1E-14 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 Deka to Other Prefixes

Possible Prefix Conversions

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