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CubeSat Mass Budget Template by cubesat-resources.space
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Purpose
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This template helps you track the mass of every component in your CubeSat against the form-factor limit, with explicit per-component margin allocation.
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How to use
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 1. Open the 'Mass Budget' sheet.
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 2. Set your form factor in cell C3 (1U, 1.5U, 2U, 3U, 6U, 12U).
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 3. The allocated mass limit will populate from the 'Limits' sheet.
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 4. Fill in components row-by-row. Yellow cells are inputs.
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 5. Adjust margin % per component based on maturity:
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 Datasheet only 30%
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 Mechanical CAD 20%
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 Engineering model 10%
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 Measured (flight) 5%
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 6. Watch the summary at the top for headroom vs. limit.
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Color coding
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 Yellow background = Input cell (you change these)
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 Blue text = Hardcoded number that should normally stay fixed
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 Black text = Formula (do not edit unless you intend to)
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 Orange background = Warning; over budget or low margin
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Form factor limits
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Standard CubeSat allocation is 2 kg per U, set CDS 14.1. Some launch providers may allow more; see your launch provider's payload user guide for the actual contractual limit. Adjust the 'Limits' sheet if your launch provider differs.
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Notes
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 - Masses are in grams throughout. Convert at the end if you need kg.
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 - Add or remove rows freely; the SUMIF totals will follow.
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 - 'Margin' in this template means contingency on a single component's mass.
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 System-level reserve (held by the systems lead) is tracked separately at
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 the bottom of the budget sheet.
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