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Convert None (base unit) to Kilo

None (base unit) (—) to Kilo (k) 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 — = 0.001 k

1 None (base unit) = 0.001 Kilo

1 Kilo = 1000 None (base unit)

1 — in every supported prefix

Conversion chart: None (base unit) to Kilo

Conversion table

None (base unit) (—) Kilo (k)
0.01 — 1E-05 k
0.1 — 0.0001 k
1 — 0.001 k
2 — 0.002 k
3 — 0.003 k
5 — 0.005 k
10 — 0.01 k
20 — 0.02 k
50 — 0.05 k
100 — 0.1 k
1000 — 1 k

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.

Kilo (k)

Definition: An SI prefix denoting a factor of 10³ — one thousand times the base unit.

History: One of the original six metric prefixes adopted by the French Academy of Sciences in 1795, alongside hecto-, deka-, deci-, centi-, and milli-.

Current use: The most familiar SI prefix in daily life — kilograms, kilometers, and kilowatts are all in routine common use worldwide.

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) → Kilo: multiply by 0.001. For example, 1 — × 0.001 = 0.001 k.

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 0.001 k. 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 Kilo are in 1 None (base unit)?

1 None (base unit) (—) equals exactly 0.001 Kilo (k).

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

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

See also