Container Demurrage & Detention Cost Calculator
Calculates port demurrage and container detention penalty charges based on free-time expiration.
Notice: engineering verification utility. Use test or de-identified data and verify results independently before relying on them.
How it works
Standard: Ocean Carrier & Terminal Tariff Rules
Formula: Penalty = Sum(Overdue Days * Daily Tier Rate)
Checks: Positive free time days; container gate-out vs return timestamps
Calculated locally in browser memory; nothing leaves your browser.
Deterministic local-first client-side execution. Provided as-is without warranty.