# Large numbers URL: https://www.toolflux.app/en/number-names/ Stand: 2026-05-21 What's the name of a number with 33 zeros? 100 zeros? Convert any number to its name in 9 notations including English, Indian lakh/crore, Japanese, scientific. BigInt to 10^200. 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: | Power | Japanese | Reading | Value | |---|---|---|---| | 10^4 | 万 | man / ichi-man | 10,000 | | 10^8 | 億 | oku / ichi-oku | 100,000,000 | | 10^12 | 兆 | chō / ichi-chō | 1,000,000,000,000 | | 10^16 | 京 | kei | 10,000,000,000,000,000 | 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: | Prefix | Symbol | Factor | Example | |---|---|---|---| | kilo | k | 10^3 | kilometre | | mega | M | 10^6 | megabyte | | giga | G | 10^9 | gigahertz | | tera | T | 10^12 | terabyte | | peta | P | 10^15 | petabyte | | exa | E | 10^18 | exaflops | | zetta | Z | 10^21 | zettabyte | | yotta | Y | 10^24 | yottabyte | | **ronna** | **R** | **10^27** | **new (2022)** | | **quetta** | **Q** | **10^30** | **new (2022)** | 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 (10^100). 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 (~10^80). The search engine Google's name is a play on the word; a googolplex is 10^googol. ### 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. ### FAQ **What is a number with 100 zeros called?** 10^100 is a googol - a 1 followed by 100 zeros, more items than the estimated count of atoms in the observable universe (~10^80). The name came from mathematician Edward Kasner's then-9-year-old nephew Milton Sirotta in 1920; Kasner popularised it in his 1940 book Mathematics and the Imagination. The search engine Google's name is a play on the word googol. A googolplex is 10^googol - a number whose decimal expansion can't even fit inside the observable universe. Larger named numbers exist in the short scale: 10^120 is a duotrigintillion, 10^303 is a centillion. Above 10^303 there's no standard short-scale name. The tool above converts any input up to 10^200 to its short-scale name, and the log scale shows where your number sits relative to a googol. **What does 1 lakh and 1 crore mean?** 1 lakh = 100,000 (one hundred thousand), 1 crore = 10,000,000 (ten million). Both belong to the Indian numbering system, which groups numbers in twos after the first three digits: 5,40,000 instead of 540,000. Lakh and crore are standard in India, Pakistan, Bangladesh, Sri Lanka, and Nepal - in financial reports, news articles, population figures, Bollywood salaries. 1 lakh crore = 10^12 = 1 trillion (short scale). Type a number above and the Indian-system card shows it in this notation. **How does the Japanese 万 system work?** In Japanese and Chinese, the breakpoint isn't every 10^3 (thousand) but every 10^4 (ten thousand). 10,000 = 1 万 (man, ichi-man). 100,000,000 = 1 億 (oku). 10^12 = 1 兆 (chō). 10^16 = 1 京 (kei). One million is therefore '100 万' (hyaku-man, 'one hundred man'), not 'one million' - the Western 'million' word doesn't exist in classical Japanese. Anyone reading Japanese news, manga, or maths textbooks runs into 万 constantly: 5万円 = 50,000 yen. The converter shows your number in this 4-digit grouping. **What comes after trillion?** In modern English short scale: trillion (10^12), quadrillion (10^15), quintillion (10^18), sextillion (10^21), septillion (10^24), octillion (10^27), nonillion (10^30). Each step is a factor of 1,000. In long scale (German, French, older British): million → milliard → billion → billiard → trillion → trilliard, where each new -ion is a factor of one million. The German 'Billion' equals 10^12 (English trillion), not 10^9. The converter shows both readings side by side. **What's the difference between a million and a billion?** 1 million = 10^6 = 1,000,000. 1 billion (modern English short scale) = 10^9 = 1,000,000,000. The factor between them is 1,000. Caveat: in German, French, and Spanish, 'billion / Billion / billón' means 10^12 not 10^9. When translating finance and population figures between English and these languages, 'billion' often becomes 'Milliarde' (10^9), and German 'Billion' becomes 'trillion' (10^12). **How do you write 5.4 million in scientific notation?** 5.4 million = 5.4 × 10^6 in scientific notation, or 5.4e6 in engineering notation (the form code, calculators, and plotting libraries use). The converter shows both directly. Scientific notation keeps the mantissa and exponent separate - useful for very large or very small numbers because no zeros need to be written. Engineering notation is the variant where the exponent is always a multiple of 3, lining up with the SI prefixes kilo (10^3), mega (10^6), giga (10^9). **What is the highest illion?** In the short scale (US, modern UK) the named ladder runs million (10^6), billion (10^9), trillion (10^12), and continues by adding three zeros per step up to centillion (10^303). Above that, no formal naming convention exists - informal terms like 'milli-millillion' aren't standard. The long scale (still used in much of Europe) puts the same names at different powers. **Is 'zillion' a real number?** No. Zillion, gazillion, jillion, bajillion are placeholders for 'a very large unspecified number' - they have no defined value in mathematics. Real named numbers run on the short or long scale up to centillion (10^303) and the named extremes googol (10^100) and googolplex (10^googol). **What are 'number names' called in math?** The general term is numeral systems. The names million, billion, etc. follow either the short scale (each step = 1,000×) or the long scale (each step = 1,000,000×). India and South Asia use a separate system based on lakh (10^5) and crore (10^7). Japanese and Chinese count in 4-zero groups (万 = 10^4, 億 = 10^8). The tool shows all systems side-by-side.