Check Carpool Passenger Counts Against Usable Seats and a Reserve
A ride plan should not assume every marked seat is available to every passenger. Subtract riders from the usable-seat count and see whether each run retains the reserve you chose.
1 · run | riders | usable passenger seats
FIRST-LOAD
Input is processed locally and a draft is saved automatically in this browser profile when storage is available. Reset to sample clears that draft; Pro history has its own clear button. A state link encodes your inputs in its URL: share only non-sensitive rows. Browser history, clipboard and anyone receiving the link may retain it. Optional AI use below leaves this device; it is not required.
Data note: Everything runs in this browser tab on the carpool seat-margin slip: your run | riders | usable passenger seats stays on this device, nothing is uploaded, and the reading is rebuilt only when you press run.
Perspective: Before: The third column is seats available to riders after the driver is accounted for. After: the carpool seat-margin slip shows the working beside each named row so the reader can change the assumption and inspect the consequence.
2 · Read the carpool seat-margin slip
Capacity arithmetic only, not transport, child-restraint or legal advice. Follow the vehicle manufacturer, child-restraint instructions, school pickup rules and local law; use a qualified fitting service when unsure. The arithmetic does not check an individual restraint installation.
Paid layer: carpool seat-margin slip print and history
one-time step · the free reading above stays complete
Free tier
- one complete carpool seat-margin slip run in the app
- three samples plus unlimited article-demo runs
- unwatermarked result text and an explicit, user-triggered state link
What $4 one-time adds
- print the carpool seat-margin slip with its row workings
- CSV of spare seats and row explanations
- last five reading summaries saved in this browser profile
$4 once for repeated filing of the carpool seat-margin slip, not for a better answer. Illustrative time basis: avoiding one five-minute manual reformat per saved reading; no market-price or guaranteed-savings claim.
Local history (this device)
- No saved runs yet — your first run files here.
Checkout is unavailable until a payment link is configured. The optional unlock is browser-local, profile-scoped and best-effort, not server-verified access. Clearing browser data can remove it; there is no account or cross-device recovery.
Boundary and sources
Capacity arithmetic only, not transport, child-restraint or legal advice. Follow the vehicle manufacturer, child-restraint instructions, school pickup rules and local law; use a qualified fitting service when unsure. The arithmetic does not check an individual restraint installation.
- Method: the equation is stated next to the result and uses only quantities entered by the reader.
- All sample records are invented examples. No standard, tariff, product rate, schedule or policy is fetched or represented as verified.
- For any threshold or rule, use the current value from the provider, handbook or qualified professional responsible for it.
Mechanism: competence-autonomy-loop
Optional AI formatting, not calculation
For this carpool seat-margin slip, an external AI text tool may help format non-sensitive notes if you already use one. No AI service or account is required: manual entry completes the same free core calculation. Do not paste private or sensitive data. Review every value against the source before using it.
Format my non-sensitive notes for a carpool seat-margin slip. Return plain rows only: run | riders | usable passenger seats. Preserve supplied quantities exactly. Do not guess missing values; list questions separately. Do not calculate or add advice. I will check every row before pasting into the local tool.
Accepted schema: run | riders | usable passenger seats. No AI response is executed as code.