EVERYDAY
Length
Distance, height, thickness and astronomical length.
Try a decimal, 1e-9, 1/3, or 5 1/2.
ResultGm → mmConvert gigametre to millimetre
EVERYDAY · ENGINEERING · SCIENCE
Unit conversion. Made clear.
Start with a familiar unit, type a value, and get a dependable answer with sensible precision. Fractions and scientific notation are welcome.
520units ready to convert
HOW IT IS CALCULATED
Convert through metre
Enter a gigametre value to calculate millimetre with full internal precision before display rounding.
Display precisionAuto · 12 significant digits
Auto keeps up to 12 significant digits, trims unnecessary zeroes, and switches to scientific notation for extreme magnitudes.
QUICK REFERENCE
All units in this quantity
| Unit | Symbol | Converted value |
|---|---|---|
| quectometrefrom Gm | qm | Interactive |
| rontometrefrom Gm | rm | Interactive |
| yoctometrefrom Gm | ym | Interactive |
| zeptometrefrom Gm | zm | Interactive |
| attometrefrom Gm | am | Interactive |
| femtometrefrom Gm | fm | Interactive |
| picometrefrom Gm | pm | Interactive |
| nanometrefrom Gm | nm | Interactive |
| ångströmfrom Gm | Å | Interactive |
| micrometrefrom Gm | µm | Interactive |
| millimetrefrom Gm | mm | Interactive |
| centimetrefrom Gm | cm | Interactive |
| decimetrefrom Gm | dm | Interactive |
| metrefrom Gm | m | Interactive |
| decametrefrom Gm | dam | Interactive |
| hectometrefrom Gm | hm | Interactive |
| kilometrefrom Gm | km | Interactive |
| megametrefrom Gm | Mm | Interactive |
| gigametrefrom Gm | Gm | Interactive |
| terametrefrom Gm | Tm | Interactive |
| petametrefrom Gm | Pm | Interactive |
| exametrefrom Gm | Em | Interactive |
| zettametrefrom Gm | Zm | Interactive |
| yottametrefrom Gm | Ym | Interactive |
| ronnametrefrom Gm | Rm | Interactive |
| quettametrefrom Gm | Qm | Interactive |
| thou / milfrom Gm | mil | Interactive |
| inchfrom Gm | in | Interactive |
| footfrom Gm | ft | Interactive |
| yardfrom Gm | yd | Interactive |
| chainfrom Gm | ch | Interactive |
| furlongfrom Gm | fur | Interactive |
| international milefrom Gm | mi | Interactive |
| nautical milefrom Gm | nmi | Interactive |
| U.S. survey footfrom Gm | ftUS | Interactive |
| typographic pointfrom Gm | pt | Interactive |
| astronomical unitfrom Gm | au | Interactive |
| light-secondfrom Gm | ls | Interactive |
| light-yearfrom Gm | ly | Interactive |
| parsecfrom Gm | pc | Interactive |
SI symbols follow international notation. U.S. and Imperial measures are labelled separately where their values differ.