Enter mission assumptions and click estimate.
| Altitude (km) | Volume (m³) | Gas mass (kg) |
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How this calculator works
Venus Aerostat Buoyancy and Altitude Planner
Use this single-page calculator to estimate how much helium or hydrogen you need for a Venus aerostat concept. It focuses on the temperate cloud-layer band where many mission studies place long-duration balloons. Enter your payload and envelope mass, choose a float altitude between 40–65 km, and set a gas temperature. The tool returns the minimum gas volume, the corresponding gas mass, and a simple size estimate.