How to use the demurrage calculator
- Total days: Total chargeable calendar period.
- Free days: Days allowed without demurrage.
- Daily rate: Charge for each day beyond free time.
- Other fees: Additional fixed charges.
- Select the button and review the result.
Worked example
12 total days with 5 free days produces 7 chargeable days.
Method and limitations
Maximum(0, total days - free days) × daily rate.
Contracts may use tiered rates, working days, holidays, and separate detention rules.
Common questions
Why might another result be different?
Inputs, rounding, policies, rates, and assumptions can differ. Compare like-for-like values and use current official information when a rate or rule can change.
Does NidXee save my entries?
No. The calculation runs in your browser. Reloading or closing the page may clear it.