How to use this notice period calculator
Enter the date you gave (or received) notice, then choose your notice length. The calculator supports:
- 1 calendar month — ends on the matching date next month (most common for UK employment)
- 4 weeks — 28 calendar days from the notice date
- Custom days, weeks, or months — whatever your contract says
The result is your estimated last day. If that day falls on a weekend or bank holiday, check your contract — some employers treat the next working day as the final day, others don't.
For a full guide on statutory vs contractual notice, see our how to work out your notice period step-by-step guide.
How to work out a notice period
Enter the date notice is given, then choose days, weeks or months. The calculator is useful for UK employment notice periods, resignation planning and contract admin, but you should still check the wording in your contract or policy.
1 month notice vs 4 weeks notice
One calendar month is not always the same as four weeks. A 1 month notice period usually ends on the matching date in the next month, while 4 weeks is 28 days. Use the unit that matches your contract.
Example: 4 weeks notice period calculator UK
If notice is given on a Monday and your contract says four weeks, enter 4 and choose weeks to estimate the end date. If the contract says one month, choose months instead.
Common UK notice period calculations
- 1 month notice period from today
- 4 weeks notice period from a resignation date
- Custom day, week or month notice periods
Employment, tenancy and contract notice
This notice period calculator is best for general UK contract and employment planning. For rented property dates, use the tenancy notice period calculator, because tenancy rules can depend on the agreement and current legislation.
Internal checks before relying on a date
Check whether notice starts on the day it is given, the next calendar day, or another date set by the contract. Also check whether your rule uses calendar days, working days, weeks or calendar months.
Important: This site is a planning aid, not legal advice. Deadlines can depend on facts, policy wording, jurisdiction, service rules, pauses, extensions and changing law. Always verify important deadlines with the official guidance or a qualified adviser.
Also see our statutory redundancy calculator for redundancy pay and notice entitlement combined.
FAQs
How do I calculate my notice period end date?
Enter the date you gave notice, choose 1 month or 4 weeks (or enter a custom amount and unit), and the calculator shows your exact end date. If your contract says 1 calendar month, choose months. If it says 4 weeks, choose weeks and set the amount to 4.
What is the statutory minimum notice period in the UK?
Under the Employment Rights Act 1996, the statutory minimum is 1 week for employees with 1 month to 2 years service, then 1 week per full year of service up to a maximum of 12 weeks for 12+ years. Your contract may give more — the contractual notice period takes precedence if it is more generous.
Is 1 month notice the same as 4 weeks?
No. One calendar month and four weeks can produce different end dates. A 1 month notice period ends on the matching calendar date next month (e.g. 5 June to 5 July). Four weeks is always 28 days. The difference can be 2-3 days depending on the month.
Does my notice period include bank holidays and weekends?
Yes — notice periods are counted in calendar days (or months), not working days, unless your contract specifically says otherwise. Bank holidays and weekends are included in the count. If your last day falls on a bank holiday or weekend, check your contract for the employer's policy.
When does my notice period start — the day I hand it in or the next day?
This depends on your contract. Some employers count from the day notice is given; others count from the next working day. Check your employment contract or staff handbook. If in doubt, use the date you handed in your notice for a conservative estimate.
What if my employer gives me notice?
The same calculator works for employer-given notice. Enter the date you received notice and your contractual or statutory notice length. Employers must give at least the statutory minimum — they cannot contract out of it.