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Essential for scientists, engineers, and students working with metric units. Results update in real-time and can be shared via URL.\n\nValue\n\nFrom yotta zetta exa peta tera giga mega kilo hecto deca unit deci centi milli micro nano pico femto atto zepto yocto\n\nTo yotta zetta exa peta tera giga mega kilo hecto deca unit deci centi milli micro nano pico femto atto zepto yocto\n\nResult\n\nYour recent:\n\nCopied!\n\n## Common Prefix Relationships\n\n**kilo → unit:** `× 1,000`\n\n**mega → kilo:** `× 1,000`\n\n**giga → mega:** `× 1,000`\n\n**milli → unit:** `× 0.001`\n\n**micro → milli:** `× 0.001`\n\n**nano → micro:** `× 0.001`\n\n## Complete SI Prefix Table\n\nPrefixSymbolPowerValueExample yottaY10²⁴1 septillionMass of Earth ≈ 6 Yg zettaZ10²¹1 sextillionGlobal data ≈ 120 ZB exaE10¹⁸1 quintillionGrains of sand ≈ 7.5 × 10¹⁸ petaP10¹⁵1 quadrillionNetflix library ≈ 10 PB teraT10¹²1 trillionLaptop SSD: 1–2 TB gigaG10⁹1 billionCPU speed: 3–5 GHz megaM10⁶1 millionPhoto size: 5 MB kilok10³1 thousandBody mass: 70 kg hectoh10²100Beer: 3.5 hL barrel decada10¹10Decathlon: 10 events **unit**—10⁰1Base unit decid10⁻¹0.1Decibel (dB) centic10⁻²0.011 cm = 0.01 m millim10⁻³0.001Aspirin dose: 325 mg microμ10⁻⁶0.000001Red blood cell: 7 μm nanon10⁻⁹0.000000001CPU transistor: 3 nm picop10⁻¹²0.000000000001Capacitor: 100 pF femtof10⁻¹⁵10⁻¹⁵Proton size: 0.88 fm attoa10⁻¹⁸10⁻¹⁸Attosecond laser pulses zeptoz10⁻²¹10⁻²¹Electron charge: 160 zC yoctoy10⁻²⁴10⁻²⁴Proton mass: 1.67 yg\n\n## Frequently Asked Questions\n\n### What are the SI metric prefixes?\n\nSI metric prefixes are standardized multipliers from **quetta (10³⁰)** down to **quecto (10⁻³⁰)**. The most common are kilo (10³), mega (10⁶), giga (10⁹), milli (10⁻³), micro (10⁻⁶), and nano (10⁻⁹).\n\n### How many milligrams are in a gram?\n\n**1,000 milligrams** = 1 gram. \"Milli\" means one thousandth (10⁻³), so 1 milligram = 0.001 grams.\n\n### What is the difference between mega and giga?\n\n**Mega** = million (10⁶). **Giga** = billion (10⁹). There is a factor of 1,000 between them: 1 GHz = 1,000 MHz, 1 GB = 1,000 MB.\n\n### What are the newest SI prefixes?\n\nIn November 2022, four new prefixes were adopted: **ronna** (10²⁷), **quetta** (10³⁰), **ronto** (10⁻²⁷), and **quecto** (10⁻³⁰). These were the first additions since 1991.\n\n### What does micro mean vs milli?\n\n**Milli** (m) = one thousandth (10⁻³). **Micro** (μ) = one millionth (10⁻⁶). 1 millimeter = 1,000 micrometers. There is always a factor of 1,000 between adjacent prefixes in the standard set.\n\n### What is the best free metric converter online?\n\nThis metric converter is completely free, requires no sign-up, and converts between all SI metric prefixes from quetta to quecto instantly in your browser.\n\n### Is this metric converter accurate and safe to use?\n\nYes. All conversions use exact SI prefix factors. The tool runs entirely in your browser with no data sent to any server, making it both accurate and private.\n\n### Key Facts\n\n- 📐 24 official SI prefixes (from quetta to quecto)\n- 📐 Each step ×10; each major step ×1,000\n- 📐 \"Kilo\" comes from Greek *chilioi* (thousand)\n- 📐 \"Milli\" comes from Latin *mille* (thousand)\n- 📐 \"Nano\" comes from Greek *nanos* (dwarf)\n- 📐 Prefixes \u0026gt;10³ and \u0026lt;10⁻³ are all Greek or Latin roots\n\n## Related Products\n\n[📊 Metric Conversion Charts →](https://www.amazon.com/s?k=metric%20conversion%20chart%20poster\u0026tag=tejji-20) [⚖️ Digital Kitchen Scales →](https://www.amazon.com/s?k=digital%20kitchen%20scale%20grams\u0026tag=tejji-20) [🥄 Measuring Cups \u0026 Spoons →](https://www.amazon.com/s?k=measuring%20cups%20and%20spoons%20set\u0026tag=tejji-20)\n\n*As an Amazon Associate, tejji.com earns from qualifying purchases.*\n\n### Prefix Timeline\n\n- **1795** — Original French metric: kilo, hecto, deca, deci, centi, milli.\n- **1960** — SI adopted: added mega, giga, micro, nano, pico.\n- **1991** — Added yotta, zetta, yocto, zepto.\n- **2022** — Added ronna, quetta, ronto, quecto.\n\n### Related Conversions\n\n[📏 Length (Metric) Conversion](/convert/length-metric-conversion) [⚖️ Mass (Metric) Conversion](/convert/mass-metric-conversion) [🔢 Number Conversion](/convert/number-conversion) [🔄 All Converters](/convert)\n\n[All unit converters →](/convert)\n\n📱\n\nQuick Access\n\nInstall this tool on your device for instant access\n\nInstall App\n\n- Temperature\n- [Temperature](/convert/temperature-conversion)\n\n\u003c!--THE END--\u003e\n\n- Length\n- [Length](/convert/length-conversion)\n\n\u003c!--THE END--\u003e\n\n- Length (Metric)\n- [Length (Metric)](/convert/length-metric-conversion)\n\n\u003c!--THE END--\u003e\n\n- Metric\n- [Metric](/convert/metric-conversion)\n\n\u003c!--THE END--\u003e\n\n- Bytes\n- [Bytes](/convert/bytes-conversion)\n\n\u003c!--THE END--\u003e\n\n- Bytes Widgets\n- [Bytes Widgets](/convert/bytes-conversion/widgets)\n\n\u003c!--THE END--\u003e\n\n- Number\n- [Number](/convert/number-conversion)\n\n\u003c!--THE END--\u003e\n\n- Angle\n- [Angle](/convert/angle-conversion)\n\n\u003c!--THE END--\u003e\n\n- Astronomical\n- [Astronomical](/convert/astronomical-conversion)\n\n\u003c!--THE END--\u003e\n\n- Frequency\n- [Frequency](/convert/frequency-conversion)\n\n\u003c!--THE END--\u003e\n\n- Mileage\n- [Mileage](/convert/mileage-conversion)\n\n\u003c!--THE END--\u003e\n\n- Mass / Weight\n- [Mass / Weight](/convert/mass-conversion)\n\n\u003c!--THE END--\u003e\n\n- Mass (Metric)\n- [Mass (Metric)](/convert/mass-metric-conversion)\n\n\u003c!--THE END--\u003e\n\n- Speed\n- [Speed](/convert/speed-conversion)","footer":"\n\n📱 Install Tejji for quick access to this tool Install\n\nTools\n\n- [All Apps](/apps/)\n- [Converters](/convert/)\n- [IP Tools](/ip/)\n- [Calculator](/apps/calculator)\n\nExplore\n\n- [Time \u0026 Date](/time-date/)\n- [Postal Codes](/zip-codes/)\n- [Typing](/typing/)\n- [Extensions](/browser/chrome/extensions/)\n\nCompany\n\n- [About](/home/about)\n- [Contact](/home/contact)\n- [Privacy](/home/privacy)\n- [Terms](/home/terms)\n\nSupport\n\n- [Feedback](/home/contact)\n- [Buy me a coffee](https://buymeacoffee.com/tejji)\n\n© 2026 [Tejji.com](/) — Free online tools for everyone.\n\nWe use cookies for analytics and ads. By clicking \"Accept\", you consent to our use of cookies. [Privacy Policy](/home/privacy)\n\nReject Accept"},"metadata":{"title":"1 kilo in unit | Metric Prefix Conversion | Tejji","description":"Free online metric prefix converter — convert between yotta, giga, mega, kilo, milli, micro, nano, yocto and all SI prefixes instantly, no sign-up required. Includes complete reference table, real-world examples, and prefix history. Works on all devices.","imageUrl":"https://tejji.com/page/og-default.png","author":null,"published":null,"modified":null},"rate":{"price":{"priceMicros":0,"currency":""},"license":{"cuid":"","licenseType":"","licensePath":"","permissions":[],"validUntil":""},"error":""}}]