Instant · Precise · Universal
32 units available
6 categories total
To convert Gm to km: multiply by 1,000,000. To convert Gm to AU: divide by 149.598.
1 Gm = 10⁹ m = 10⁶ km = 0.00668 AU.
For example, 1 Gigameter (Gm) = 10000000 Hectometer (hm).
| Gigameter (Gm) | Hectometer (hm) |
|---|---|
| 0.1 | 1000000 |
| 0.5 | 5000000 |
| 1 | 10000000 |
| 2 | 20000000 |
| 5 | 50000000 |
| 10 | 100000000 |
| 25 | 250000000 |
| 50 | 500000000 |
| 100 | 1000000000 |
| 500 | 5000000000 |
| 1000 | 10000000000 |
The gigameter is a unit of length equal to 10⁹ meters, or one billion meters (one million kilometers).
1 Gm = 10⁹ m = 10⁶ km = 0.00668 AU.
To convert Gm to km: multiply by 1,000,000. To convert Gm to AU: divide by 149.598.
Describing distances between planets in a compact metric format, though AU is preferred.
Light travels about 0.3 Gm per second (299,792 km/s ≈ 0.3 Gm/s).
Mixing up Gm with Gb (gigabyte) in mixed technical contexts. Context matters for the prefix 'giga'.
The Sun is ~150 Gm away from Earth — this is a useful anchor for the gigameter scale.
The hectometer is a unit of length equal to 100 meters, or one tenth of a kilometer.
1 hm = 100 m = 0.1 km = 10 dam. One square hectometer (hm²) equals one hectare.
To convert hm to meters: multiply by 100. To convert hm to km: divide by 10.
The hectare (1 hm²) is its most common derived application. Occasionally used for short road distances.
A 100-meter Olympic sprint is exactly 1 hectometer. The hectare = 1 hm² is far more famous than the hectometer itself.
Confusing hectometer with hectare — the hectometer is a unit of length, the hectare is a unit of area (1 hectare = 1 hm²).
A football field is roughly 1 hectometer long — use this as a mental benchmark for 100 meters.



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