Payload Mass Budget
Roll up a mission mass budget with subsystem contingencies, propellant, system margin, and launch vehicle capacity.
Budget summary
30.8 kg item
19.6 kg system margin
5 items
5 active categories
Mass rollup and launch fit
Contingency and propellant consume launch margin.
The rollup shows how subsystem dry mass grows through contingency, propellant, system margin, and the final launch capacity gate.
9.6 kg remaining
Launch mass envelope
250.4 / 260.0 kg used
Subsystem category load
dry mass plus item contingency
Open Source and Easy to Use Elsewhere
This tool is open source and the underlying logic is fully transparent. You can inspect the code, understand the calculations, and contribute improvements. If you want to use the tool in your own website, course page, or learning platform, you can also embed it directly and start from a ready-made iframe setup for this exact tool.
Open source: review the implementation and see how the results are produced.
Embeddable: preview this tool, copy the iframe, and use it in your own site or LMS.