Courtready's Ontario Superior Court Litigation Deadlines Calculator

This calculator helps you compute deadlines under the Rules of Civil Procedure.

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Last updated: Version 4.001 - June 8, 2026.

Use this free tool to calculate litigation deadlines under Ontario's Rules of Civil Procedure. This calculator determines the date on which a deadline falls by applying Rule 3.01 (computation of time) and Rule 1.03 (definition of "holiday"), including weekends and Ontario court holidays.

DO NOT USE THIS CALCULATOR FOR SMALL CLAIMS COURT DEADLINES. Use this one instead. This calculator does not account for special holidays proclaimed by the Governor General or Lieutenant Governor under Rule 1.03(1)(m). Always check for any proclaimed holidays that may affect your deadline.

Disclaimer: This tool is provided for reference purposes only. Always verify deadlines against applicable law and seek legal advice when appropriate. For questions or to report an error, please email Tom at admin [at] courtready.ca.

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1
What are you trying to calculate?
Select one option from below.

The "BETWEEN" option uses the rule 3.01(1)(a) convention: exclude the first date, include the second.

2
Enter the relevant dates and deadline
3
OPTIONAL - Service details (see instructions below)
Is the "Event date" from Step 2 the date of SERVICE of a non-originating process? (r. 3.01(1)(d))

An "originating process" is a document that starts a lawsuit. It includes documents like, among others, a statement of claim, notice of action, notice of application, counterclaim against a new party, or a third or subsequent party claim. If the "event date" from step two is the date of service of an originating process, then rule 3.01(1)(d) does not apply, and you should select "No".

Rule 3.01(1)(d): If checked, service made after 4:00 PM or on a holiday is deemed to have been made on the next day that is not a holiday. Select "No" here UNLESS the "event date" from step two is the date of service of a non-originating process.
4
Calculate
Result:

Explanation

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Make sure the cases you're relying on are real.

Courtready tracks fictitious, AI-hallucinated citations across Canadian courts and tribunals. CaseCheck helps you verify your authorities before you file.