Demurrage Calculator

Demurrage from laytime used and daily rate.

Legal Disclaimer

This calculator provides general estimates only and does not constitute legal advice. Laws, regulations, and court procedures vary significantly by jurisdiction. Consult a licensed attorney in your area for advice specific to your situation.

Inputs

Laytime Allowed (hours)

Laytime Used (hours)

Demurrage Rate ($/day)

Despatch Rate (% of demurrage)

Cargo Tonnage (MT)

Tab to move between fields

Results

Demurrage Charge ($)

$25,000.00

≈ 13 gaming PCs

Net Charge ($)

$25,000.00

≈ 13 gaming PCs

Despatch Credit ($)$0.00

Excess Days1

Days Saved0

Cost per Ton ($)$0.50

Actual Rate (T/hr)520.8

Required Rate (T/hr)694.4

How to Use This Calculator

Enter Laytime Allowed in hours per the charter party agreement.
Set Laytime Used — actual hours from NOR (Notice of Readiness) tender to completion of loading/discharge.
Enter Demurrage Rate per Day and Despatch Rate % (typically 50% of demurrage).
Enter Cargo Tonnage in metric tons.
Review Demurrage Charge if laytime is exceeded or Despatch Credit if completed early.
Check your charter party for any exceptions to laytime (weather, strikes, port congestion) before disputing demurrage.

How the result changes with Laytime Used (hours)

Laytime Used (hours)	Demurrage Charge ($)	Net Charge ($)
72	$0.00	$0.00
252	$187,500.00	$187,500.00
468	$412,500.00	$412,500.00
648	$600,000.00	$600,000.00

What each input means

Laytime Allowed (hours): Contractual laytime for loading/unloading.
Laytime Used (hours): Actual time taken for cargo operations.
Demurrage Rate ($/day): Daily demurrage rate per charter party.
Despatch Rate (% of demurrage): Credit rate for early completion. Typically 50%.
Cargo Tonnage (MT): Total cargo in metric tons.

What each result means

Demurrage Charge ($): Charge for exceeding allowed laytime.
Despatch Credit ($): Credit for finishing early.
Net Charge ($): Demurrage minus despatch credit.
Excess Days: Days over allowed laytime.
Days Saved: Days under allowed laytime.
Cost per Ton ($): Net charge per ton of cargo.
Actual Rate (T/hr): Actual loading/unloading rate.
Required Rate (T/hr): Rate needed to avoid demurrage.

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
Laytime Allowed (hours) = 72, Laytime Used (hours) = 96, Demurrage Rate ($/day) = 25000, Despatch Rate (% of demurrage) = 50 = 5 input(s) provided
Calculate Demurrage Charge
Demurrage Charge = excessDays * demurrageRatePerDay
25000 = $25,000
Calculate Net Charge
Net Charge = demurrageCharge - despatchCredit
25000 = $25,000
Calculate Despatch Credit
Despatch Credit = earlyDays * despatchRate
0 = $0
Calculate Excess Days
Excess Days = excessHrs / 24
1 = 1