Calculate knockback outcomes for Super Smash Bros. Ultimate with this calculator.
Ssbu Calculator
SSBU Calculator estimates knockback for Super Smash Bros. Ultimate based on values entered by the user.

About Ssbu Calculator
SSBU Calculator is an open source, web-based tool for Super Smash Bros. Ultimate that estimates move knockback based on user-input values. It also includes a KO percentage calculator, a percentage calculator for required target knockback, and a launch trajectory visualizer with stage layout collision detection. The tool notes that KO percentage calculations have a small margin of error due to missing character model, ECB, and animation data, and stage collision detection may produce unusual results for bounced trajectories.
Key features
- Estimates Super Smash Bros. Ultimate move knockback from user inputs
- Calculates opponent KO percentages for given stage positions
- Determines optimal DI angles for opponent survival at positions
- Generates vector fields for best DI across multiple positions
- Calculates target percent needed for specified knockback values
- Visualizes launch trajectory with stage collision detection
- Open source, allowing community contributions and modifications
- Web-based, accessible directly in a browser without installation
- Combines multiple Smash Ultimate analysis tools in a single platform
- KO percentage calculations have a small margin of error due to missing character model, ECB, and animation data
- Stage collision detection may produce unusual results for bounced trajectories
- DI vector field generation is resource-heavy and may freeze the page or trigger a 'page not responding' popup
Ssbu Calculator at a glance
- Category
- Gaming › Game Guides, Wikis & Tools
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Platforms
- Windows
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Ssbu Calculator FAQ
What features does the SSBU Calculator's KO calculator include?
Why might KO percentage calculations be slightly inaccurate?
What issues can occur when generating a DI vector field?
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