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

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