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Ideal for scientists, pharmacists, and engineers working with precise mass measurements. Results update in real-time and can be shared via URL.\n\nValue\n\nFrom centigram decigram decitonne dekagram exagram femtogram gigagram gigatonne gram hectogram kilogram kilotonne megagram megatonne microgram milligram myriagram nanogram petagram picogram teragram ton tonne yoctogram yottagram zeptogram zettagram\n\nTo centigram decigram decitonne dekagram exagram femtogram gigagram gigatonne gram hectogram kilogram kilotonne megagram megatonne microgram milligram myriagram nanogram petagram picogram teragram ton tonne yoctogram yottagram zeptogram zettagram\n\nResult\n\nYour recent:\n\nCopied!\n\n## Metric Mass Conversions\n\n**tonne → kg:** `× 1,000`\n\n**kg → g:** `× 1,000`\n\n**g → mg:** `× 1,000`\n\n**mg → μg:** `× 1,000`\n\n**μg → ng:** `× 1,000`\n\n**kilotonne → tonne:** `× 1,000`\n\n## Metric Mass Scale\n\nUnitGramsReal-World Example yottagram (Yg)10²⁴ gEarth's mass ≈ 5,972 Yg exagram (Eg)10¹⁸ gEarth's atmosphere ≈ 5.15 Eg petagram (Pg)10¹⁵ gAnnual CO₂ emissions ≈ 40 Pg teragram (Tg)10¹² gGreat Pyramid ≈ 6 Tg gigatonne (Gt)10¹² gAnnual plastic production ≈ 0.4 Gt megatonne (Mt)10⁹ gLarge cargo ship ≈ 0.2 Mt tonne (t)10⁶ gSmall car ≈ 1.5 t kilogram (kg)10³ gLiter of water = 1 kg gram (g)1 gPaper clip milligram (mg)10⁻³ gGrain of salt ≈ 60 mg microgram (μg)10⁻⁶ gVitamin B12 daily need: 2.4 μg nanogram (ng)10⁻⁹ gDNA in a cell ≈ 6 ng picogram (pg)10⁻¹² gSingle bacterium ≈ 1 pg femtogram (fg)10⁻¹⁵ gHIV virus ≈ 1 fg\n\n## Frequently Asked Questions\n\n### How many milligrams are in a gram?\n\nExactly **1,000 milligrams** in one gram. To convert: mg ÷ 1,000 = g, or g × 1,000 = mg.\n\n### How many grams are in a kilogram?\n\nExactly **1,000 grams** in one kilogram. The kilogram is the base SI unit of mass and the only SI unit whose name already includes a prefix (kilo-).\n\n### What is a microgram?\n\nA microgram (μg) = one millionth of a gram (10⁻⁶ g). Common in medicine: vitamin D daily need is about 15 μg, vitamin B12 about 2.4 μg. Often abbreviated \"mcg\" on supplement labels.\n\n### What is the difference between a tonne and a kilotonne?\n\nA **tonne** = 1,000 kg. A **kilotonne** = 1,000 tonnes = 1,000,000 kg. Megatonne (Mt) = 1,000,000 tonnes, commonly used for nuclear weapon yield and climate science.\n\n### How is the kilogram defined?\n\nSince 2019, the kilogram is defined by fixing the **Planck constant** at exactly 6.62607015 × 10⁻³⁴ J·s. Previously, it was defined by a physical platinum-iridium cylinder (the IPK) stored in Paris since 1889.\n\n### What is the best free metric mass converter?\n\nTejji.com offers a completely free metric mass converter that runs entirely in your browser — no sign-up required, no ads until you interact, and supports all SI prefixes from yoctograms to yottagrams.\n\n### Can I use this converter without signing up?\n\nYes. The converter is 100% free and requires no account, no email, and no personal information. Just open the page and start converting.\n\n### Key Facts\n\n- ⚖️ kg is the only SI base unit with a prefix in its name\n- ⚖️ 1 liter of water at 4°C = exactly 1 kg\n- ⚖️ Earth's mass: ~5.972 × 10²⁴ kg\n- ⚖️ Proton mass: ~1.67 × 10⁻²⁷ kg\n- ⚖️ \"Tonne\" comes from Old French *tun* (barrel)\n- 📊 Uses in medicine: μg (vitamins), mg (drugs), g (supplements)\n\n## Related Products\n\n[⚖️ Kitchen Scales →](https://www.amazon.com/s?k=digital%20kitchen%20scale%20grams\u0026tag=tejji-20) [💎 Jewelry Scales →](https://www.amazon.com/s?k=jewelry%20scale%20milligram\u0026tag=tejji-20) [🏋️ Bathroom Scales →](https://www.amazon.com/s?k=bathroom%20scale%20digital%20body%20weight\u0026tag=tejji-20)\n\n*As an Amazon Associate, tejji.com earns from qualifying purchases.*\n\n### Related Conversions\n\n[⚖️ Mass (Imperial) Conversion](/convert/mass-conversion) [📐 Metric Prefix Conversion](/convert/metric-conversion) [📏 Length (Metric) Conversion](/convert/length-metric-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 kilogram in gram | Mass (Metric) Conversion | Tejji","description":"Free online metric mass converter — convert between milligrams, grams, kilograms, tonnes, micrograms, nanograms and more instantly, no sign-up required. Includes SI prefix table and real-world mass comparisons. 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":""}}]