Hectometer is 100 meter units.
Hectometers to Gigameters Converter — hm to Gm
Convert Hectometer (hm) to Gigameter (Gm) using the exact conversion factor (1 hectometer = 1e-7 gigameter). See the formula, worked examples, and conversion table.
Hectometers to Gigameters converter
Converter
Length Converter
Convert SI, imperial, US customary, astronomical, scientific, and historical length units.
Context values
Some unit families need one extra value for a physically accurate result.
Gigameter is 1000000000 meter units.
Result = input x 100 / 1e+9.
Length uses the meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Hectometers to Gigameters
Hectometer and Gigameter both measure length. Specifically: Hectometer is 100 meter units, and gigameter is 1000000000 meter units.
Formula
gigameters = hectometers × 1e-7
This factor comes from each unit's defined relationship to the category's base unit: 1 hectometer equals 100 base units, and 1 gigameter equals 1000000000 base units, so dividing one by the other gives the direct hectometer-to-gigameter factor of 1e-7.
Simple example
1 hm × 1e-7 = 1e-7 Gm
1 hectometer = 1e-7 gigameters.
Real-world example
10 hm × 1e-7 = 0.000001 Gm
10 hectometers = 0.000001 gigameters.
Conversion table
| Hectometer (hm) | Gigameter (Gm) |
|---|---|
| 1 hm | 1e-7 Gm |
| 5 hm | 5e-7 Gm |
| 10 hm | 0.000001 Gm |
| 21.0975 hm | 0.0000021098 Gm |
| 42.195 hm | 0.0000042195 Gm |
| 100 hm | 0.00001 Gm |
Reverse conversion: Gigameter to Hectometer
1e-7 Gm × 10000000 = 1 hm
1e-7 gigameters = 1 hectometer.
hectometers = gigameters × 10000000
For a page dedicated to this direction, see Gigameter to Hectometer.
Understanding the Hectometer (hm)
Hectometer is 100 meter units.
Understanding the Gigameter (Gm)
Gigameter is 1000000000 meter units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many gigameters are in 1 hectometer?
1 hectometer equals 1e-7 gigameters, using the exact defined conversion factor rather than an estimate.
How do I convert hectometer to gigameter?
Multiply the hectometer value by 1e-7. The converter above does this instantly to whatever precision you set.
How do I convert gigameter back to hectometer?
Use the reverse factor: 1 gigameter equals 10,000,000 hectometers. You can also use the swap control in the converter above to flip the direction instantly.
What is a hectometer?
Hectometer (hm) is a unit of length.
What is a gigameter?
Gigameter (Gm) is a unit of length.
Is the hectometer to gigameter conversion exact?
Yes. Both hectometer and gigameter are defined by fixed standards rather than physical artifacts, so the factor of 1e-7 used above is exact to as many digits as you choose to display.