Free tool

Free Time Calculator

Calculate the free days left since discharge and whether you have entered chargeable days. No sign-up needed; results update as you type.

See the system that does this automaticallyOpen the live demo

Calculator

This calculator runs in your browser; the data you enter is not stored.

Results

Last free day
10/6/2026
Days used
7 days
Free days left
0 days
Chargeable days
0 days

Free Time Calculator: worked example

Example values: Discharge date 9/30/2026, Free days 7 days, Calculation date 10/6/2026. With these values the results are:

Last free day10/6/2026
Days used7 days
Free days left0 days
Chargeable days0 days

How to use: Free Time Calculator

  1. Enter your own values: Discharge date, Free days, Calculation date.
  2. Choose the currency; money inputs are converted at an approximate rate.
  3. Results are calculated as you type: Last free day, Days used, Free days left, Chargeable days.
  4. Check every step of the calculation in the formulas below.

How is it calculated?

  • Last free day = [Discharge date] + [Free days] − 1
  • Days used = [Calculation date] − [Discharge date] + 1
  • Free days left = max(0; [Free days] − [Days used])
  • Chargeable days = max(0; [Days used] − [Free days])

Other tools running on Container Time Engine

Calculates free time, demurrage, detention and storage tiers by number of days.

FCRSOFT

FCRSOFT does this for you automatically

You don’t need to do the calculations and checks on this page by hand every day. FCRSOFT derives them all automatically from the records entered in the field.

  • Each container’s free time is counted from discharge.
  • You are warned before the last free day.
  • Any demurrage and detention incurred is posted to the file cost.

Frequently asked questions

How is Free Time Calculator calculated?

Calculate the free days left since discharge and whether you have entered chargeable days. The calculation uses Container Time Engine: Calculates free time, demurrage, detention and storage tiers by number of days.

How is Last free day found?

Last free day = [Discharge date] + [Free days] − 1. With the example values (Discharge date 9/30/2026, Free days 7 days, Calculation date 10/6/2026) the result is 10/6/2026.

How is Free days left found?

Free days left = max(0; [Free days] − [Days used]). With the example values (Discharge date 9/30/2026, Free days 7 days, Calculation date 10/6/2026) the result is 0 days.

Worked example: Free Time Calculator

Example values: Discharge date 9/30/2026, Free days 7 days, Calculation date 10/6/2026. Last free day: 10/6/2026; Days used: 7 days; Free days left: 0 days; Chargeable days: 0 days.

Is Free Time Calculator free?

Yes. The tool is free, needs no sign-up and runs in your browser; the data you enter is not stored.

Can FCRSOFT do this calculation automatically?

FCRSOFT counts each container’s free time and warns you before charges start. You can try the Freight & Container package in the live demo without installing anything.

Which currency can I calculate in?

Choose one of 28 currencies in the currency selector; monetary inputs are converted at an approximate rate. To use your own rate, enter the amounts directly.

FCRSOFT

Act Before Demurrage and Detention Invoices Arrive

FCRSOFT counts each container’s free time, warns you before the last free day and posts any demurrage and detention to the file.

FCRSOFT solutions

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