Decide whether to use mushrooms on a shortcut
This calculator estimates the expected time saved per shortcut attempt (EV), the expected total race time saved for your mushroom count, and suggests the best lap to use mushrooms based on your execution skill, track-specific shortcut potential, and failure penalty. Use EV = S × (1 − p) − F × p where:
- S = raw seconds saved when the shortcut succeeds
- p = fail probability based on execution skill and shortcut difficulty
- F = seconds penalty when the shortcut fails
MK8 Shortcut Time Save Calculator
Expected save / use
0.00s
Total expected race save
0.00s
Fail chance
0%
Recommendation
—
Pick a preset or choose 'Custom' to set S/p/F manually.
Build affects how effective shortcuts are (simple multiplier).
Number of usable mushrooms in the race.
0.75
0 = always fail, 1 = near-perfect execution
Your typical lap time on this track (helps contextualize % saved).
Total laps in the race — used to limit shroom uses vs laps.
EV formula: EV = S×(1−p) − F×p. Recommended if EV ≥ 0.15s per use.
Results
| Metric | Value |
|---|---|
| Selected track | — |
| Raw save on success (S) | 0.00s |
| Failure penalty (F) | 0.00s |
| Fail chance (p) | 0% |
| Expected save per use (EV) | 0.00s |
| Shroom uses considered | 0 |
| Total expected race time saved | 0.00s |
| Percent of a baseline lap | 0.00% |
| Suggested lap to use | — |
These estimates are probabilistic and intended to help decision-making. Real outcomes depend on traffic, items, opponents, and in-race conditions. Use EV thresholds (≥0.15s) as a guideline — your personal risk tolerance may differ.
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Last updated • MK8 shortcut strategy & estimators.