Number names: 9 notations from million to googol

A number is always the same quantity. The name for it depends on language, culture, and field. The converter below shows your input simultaneously in nine notations: English long form (German Langform too), scientific notation, engineering notation, M-suffix abbreviation, Indian lakh and crore, Japanese 万 system, Chinese 万/億 system, and a log-scale visualiser with a googol marker. Plus a reference table of SI metric prefixes from kilo to quetta.

Million to centillion - the scale-name table

The German long scale alternates between -ion and -iarde in 6-step cycles; the English short scale gets a new name every factor of 1,000. The table below shows both scales row-by-row at the same power of ten, so the notorious translation trap (English billion = German Milliarde, not Billion) is visible at a glance. German names cover 10^6 to 10^603 (Zentilliarde); English short-scale names stop at 10^303 (centillion). Click any row to open that magnitude in the converter above.

The German Billion vs English billion trap

In modern English (US, UK media since 1974), "billion" means 10^9 - that's German Milliarde. German "Billion" is 10^12. So when an English finance article says "Apple is worth two trillion dollars", the German is "Apple ist zwei Billionen Dollar wert" - trillion → Billion, not trillion → Trillion.

The historical "long scale" (still used in French, Spanish, German) follows the same logic as German: million → milliard → billion → billiard. US English has used the "short scale" since the 19th century, with every factor of 1,000 getting a new name; British English officially switched in 1974.

Indian system: lakh and crore

In South Asia (India, Pakistan, Bangladesh, Sri Lanka, Nepal), numbers group in twos after the first three digits, not threes throughout. Notation: 5,40,000 instead of 540,000. The two key terms:

• 1 lakh = 100,000 (10^5)
• 1 crore = 10,000,000 (10^7) = 100 lakh
• 1 lakh crore = 10^12 = 1 trillion (short scale)

Indian English finance reporting routinely uses lakh and crore - Mumbai stock exchange, Bollywood salaries, population figures, government budgets. The card above renders your number with the correct grouping.

Japanese 万: a new name every four digits

In Japanese and Chinese, a new name appears every 10^4 (ten thousand) instead of every 10^3 (thousand) as in Western languages. The key powers:

Consequence: classical Japanese has no single word for "one million". Instead it's 百万 (hyaku-man, "one hundred man") for 1,000,000. Anyone reading Japanese manga, news, or maths textbooks meets these constantly: 5万円 (5 man yen) = 50,000 yen.

The Chinese system has the same structure with partly different characters (亿 simplified for 億 traditional). At very large powers the systems diverge.

The log scale: where your number sits before googol

The log scale above is not just a display - it's a slider. Drag the dot to grow or shrink your number by powers of ten. Tap a marker (million, billion, trillion, googol) to jump straight there. Each marker carries a verified "Did you know?" fact from astronomy, physics, or mathematics.

When the input reaches or exceeds 10^100, the strap lights up: 100 zeros = 1 googol. The term came from Edward Kasner's then-9-year-old nephew Milton Sirotta; Kasner published it in his 1940 book Mathematics and the Imagination. The search engine Google's name is a play on the word googol.

A googol exceeds the estimated count of atoms in the observable universe (~10^80). It still sits below two famous landmarks: the Shannon estimate of possible chess games (~10^120) and the exact count of legal 19x19 Go positions (2.08 × 10^170, computed by John Tromp in 2016). Above 10^500, the scale gives up - "beyond meaningful representation".

Metric prefixes: kilo, mega, giga, ronna, quetta

The SI prefixes group powers of 10 in steps of 10^3 with a single letter:

The General Conference on Weights and Measures added ronna (R) and quetta (Q) in 2022 because modern data volumes, astronomical masses, and cosmological scales overflow yotta. Earth's mass is roughly 6 ronnagrams (6 Rg). Many older charts don't list these two yet.

Scientific and engineering notation

Scientific notation 5.4 × 10^6 separates the mantissa and the exponent. Useful for very large or very small numbers because no string of zeros has to be written. The mantissa typically sits between 1 and 10.

Engineering notation 5.4e6 (or 5.4E6) is the variant where the exponent is always a multiple of 3, aligning with the SI prefixes: 10^3 = kilo, 10^6 = mega, 10^9 = giga. The e-notation is widely supported across calculators, programming languages, and plotting libraries.

You can also use scientific notation as input: 5.4e6, 5,4e6, 2.5 × 10^12, 2.5*10^12 are all read as the same number.

What the parser accepts

• Whole numbers with arbitrary digit count (10^200 is fine - the parser uses BigInt).
• Decimal point or comma: 5.4 and 5,4 mean the same.
• Thousands separators: 5,400,000 or 5.400.000 parse correctly.
• Scientific: 5.4e6, 5,4E6, 2.5 × 10^12, 2.5*10^12 are equivalent.
• Negative numbers with leading -. Word forms get a "minus" / "negative" prefix.
• Soft cap at 10^500: above that, the converter says "beyond meaningful representation".

Three interactions easy to miss

The cards above do more than display values.

Click any card value → it becomes the new input. If the Indian-system card shows 54 lakh, click that value, and the input switches to 5,400,000 - every other card recomputes. The equivalence between systems becomes tactile rather than abstract. The SI-prefix table works the same way: clicking any row jumps the input straight to that power of ten.

Input lands near a famous magnitude → a matching "Did you know?" fact surfaces. Type 6.022 × 10^23 and the hero shows Avogadro's number. At 1.989 × 10^30, the solar mass. At 10^100, the googol marker. 22 anchors cover astronomy, physics, biology, and mathematics - each with source and publication year.

Number in Julian Day range (2,400,000 - 2,600,000) → a chip links to the Timestamp Converter. Type a 7-digit number between 2.4M and 2.6M - the "Looks like a Julian day" chip appears, and one click reveals the date.

FAQ

What is a number with 100 zeros called?

A googol. The name came from Edward Kasner's then-9-year-old nephew Milton Sirotta; Kasner published it in Mathematics and the Imagination (1940). Larger than the estimated count of atoms in the observable universe.

What does 1 lakh and 1 crore mean?

1 lakh = 100,000 (10^5). 1 crore = 10,000,000 (10^7) = 100 lakh. Standard in South Asia (India, Pakistan, Bangladesh, Sri Lanka, Nepal). Notation: 5,40,000 instead of 540,000.

What comes after trillion?

In short scale: quadrillion (10^15), quintillion (10^18), sextillion (10^21), septillion (10^24), octillion (10^27), nonillion (10^30). Each step is 1,000×.

What's the difference between a million and a billion?

Million = 10^6, billion (short scale) = 10^9. Factor 1,000. Note: German Billion = 10^12, English trillion equivalent.