Convert Gigalitres to Cubic Kilometres (GL to km3)
1 gigalitre (GL) = 0.001 cubic kilometres (km³). 1 km³ = 1000 GL. Example: 15 GL = 15 × 0.001 = 0.015 km³.
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1 GL = 0.001 km³
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk gigalitre to cubic kilometre converter to paste a column from Excel.
How to Convert Gigalitre to Cubic Kilometre
- 1 GL = 0.001 km³
- 1 km³ = 1000 GL
- Example: convert 15 GL to km³: 15 GL = 15 × 0.001 km³ = 0.015 km³
Formula
km³ = GL ÷ 1000
Derivation from SI units:
- 1 GL = 10⁹ L = 10⁶ m³ = 1 MCM.
- 1 km³ = 10⁹ m³ = 1 BCM.
- 1 GL = 1 MCM ÷ 1000 MCM per km³ = 0.001 km³
Both units are defined exactly, so the factor is exact. Gigalitre definition: gigalitre; Cubic Kilometre definition: cubic kilometre.
Worked examples
- A reading of 5 GL converts to 0.005 km³.
5 GL × 0.001 = 0.005 km³ - A value of 100 GL is 0.1 km³.
100 GL × 0.001 = 0.1 km³
Gigalitre to Cubic Kilometre conversion table
| Gigalitres (GL) | Cubic Kilometres (km³) |
|---|---|
| 0.1 GL | 0.0001 km³ |
| 0.5 GL | 0.0005 km³ |
| 1 GL | 0.001 km³ |
| 5 GL | 0.005 km³ |
| 10 GL | 0.01 km³ |
| 50 GL | 0.05 km³ |
| 100 GL | 0.1 km³ |
| 500 GL | 0.5 km³ |
| 1000 GL | 1 km³ |
| 10000 GL | 10 km³ |
Where it's used
Gigalitres are used for australian dam storage, while cubic kilometres appear in global water budgets. Both measure volume of stored or released water (reservoirs, river flows, allocations), so the conversion is a fixed factor.
Gigalitre to other water volume units
| Conversion | 1 GL equals |
|---|---|
| gigalitre to cubic kilometre | 0.001 km³ |
| gigalitre to MCM | 1 MCM |
| gigalitre to BCM | 0.001 BCM |
| gigalitre to TMC | 0.03531466672 TMC |
| gigalitre to acre-foot | 810.7131938 acre-ft |
| gigalitre to cubic metre | 1000000 m³ |
| gigalitre to Mcft | 35.31466672 Mcft |
| gigalitre to MAF | 0.0008107131938 MAF |
Show 2 more units
| gigalitre to hectare-metre | 100 ha·m |
|---|---|
| gigalitre to megalitre | 1000 ML |
Frequently asked questions
How many cubic kilometres are in 1 gigalitre?
1 GL = 0.001 km³.
How do I convert gigalitres to cubic kilometres?
Multiply the value in GL by 0.001, or divide it by 1000. For example, 15 GL × 0.001 = 0.015 km³.
Is the GL to km³ conversion exact?
Yes. Both units are defined exactly, and 1 GL is exactly 0.001 km³.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (derived units) and Table 8 (non-SI units accepted for use with the SI).
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Gigalitres to Cubic Kilometres (GL to km3). Retrieved October 29, 2026, from https://scientificconverters.com/water-volume/gigaliters-to-cubic-kilometers/
IEEE
Scientific Converters, "Convert Gigalitres to Cubic Kilometres (GL to km3)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/water-volume/gigaliters-to-cubic-kilometers/