Master every deadline.
Free, fast date calculators for business days, legal filings, invoices, contracts and life events — with multi-country holidays, custom rules and clear breakdowns.
- No signup
- Runs in your browser
- 18 languages
- Multi-country holidays
From May 1 to May 30 — US holidays excluded.
- Calendar days
- 29
- Weekends
- 8
- Holidays
- 1
- Net business days
- 21
Fast
All math runs in your browser — no round trip, no waiting.
Private
Your dates never leave the page. Nothing is logged.
Multi-country
Pick from common country holiday sets, or bring your own list.
Clear breakdowns
See exactly how each result was computed, step by step.
Popular calculators
Calculators →Business Days Between Two Dates
Count weekdays between two dates, excluding weekends and holidays.
OpenAdd Business Days to a Date
Add N business days to a starting date, skipping weekends and holidays.
OpenNet 30 Invoice Due Date
Compute due dates for Net 15 / 30 / 60 / 90 invoices.
OpenTax Filing Deadline Extender
Tax filing extension deadlines (US).
OpenBusiness Hours Between Two Dates
Working hours between two timestamps, excluding lunch breaks, weekends and holidays.
OpenWorking Days per Month
Workday count for every month of a given year, by country.
OpenAll calculators
Business
Business Days Between Two Dates
Count weekdays between two dates, excluding weekends and holidays.
OpenAdd Business Days to a Date
Add N business days to a starting date, skipping weekends and holidays.
OpenCustom Holiday Business Day Calculator
Bring your own holidays — exclude any list of dates from counts.
OpenNZ / AU Business Day Calculator
New Zealand and Australia public holidays + business-day arithmetic.
OpenProject Milestone Projector
Project milestones forward by N business days from a kickoff.
OpenSpecific Weekday Adder
Add N Mondays (or any weekday) from a starting date.
OpenFiscal Year Business Day Counter
Working days remaining in your fiscal year.
OpenContract End Date Calculator
Find the end date of a fixed-term contract.
OpenShipping Delivery Date Estimator
Estimate delivery dates from carrier transit times.
OpenEvent Planning Buffer
Add a safety buffer to an event date.
OpenRecurring Meeting Date Generator
Generate N future meeting dates from a recurrence rule.
OpenSubscription Renewal Date
When does my subscription renew?
OpenInternational Business Day Converter
Cross-timezone business day overlaps.
Open4-Day / Custom Work Week
Calculate business days using any custom work-week pattern.
OpenDate Difference Analyzer
Years, months, weeks, days and business days between dates.
OpenBid / Tender / RFP Deadline
Project bid deadlines back from a target award date.
OpenBoard Meeting Notice Period
Reverse-calc the last day notices must go out before a board vote.
OpenCustoms Demurrage Penalty Tracker
First billable penalty day when a container overstays port free time.
OpenPerishable Shelf-Life Logistics Matrix
Match transit time against shelf-life so cold-chain shipments arrive fresh.
OpenJIT Manufacturing Reorder Window
Reverse-calc the latest purchase-order release day based on supplier lead time.
OpenMulti-Carrier Shipping Comparator
Side-by-side delivery dates for USPS, FedEx, UPS and DHL using each carrier's operating days.
OpenCustoms Clearance Date Estimator
Project the expected cleared-by date for international imports.
OpenBusiness Hours Between Two Dates
Working hours between two timestamps, excluding lunch breaks, weekends and holidays.
OpenTimezone Working Hours Overlap
Find when business hours overlap across multiple time zones.
OpenWorking Days per Month
Workday count for every month of a given year, by country.
OpenWorking Days Left in Year
How many business days remain until December 31?
OpenBusiness Days Countdown to a Date
Live workday countdown to a future target date.
OpenHoliday Bridge-Day Finder
Spot when a public holiday creates a 3- or 4-day weekend by taking a bridge day off.
OpenConstruction Working Days Calculator
Site work days excluding weekends, holidays and weather/rain days.
OpenConstruction Shutdown Calculator
Net working days inside a date range after subtracting industry shutdowns.
OpenManufacturing Lead Time Calculator
Production lead time across multi-shift factory calendars.
OpenPurchase Order Lead-Time
Receipt date for a PO given supplier lead time and transit.
OpenWorking Hours + Business Days Combo
Total business days AND business hours between two timestamps.
OpenNZ Public Holiday Impact
Working days inside a range with all NZ regional anniversary days called out.
OpenFinance
Net 30 Invoice Due Date
Compute due dates for Net 15 / 30 / 60 / 90 invoices.
OpenPayment Terms Calculator (2/10 Net 30)
Discount cutoff + net due date for early-payment terms.
OpenFreelance Invoice Scheduler
Schedule recurring invoices with due dates and reminders.
OpenLoan / Mortgage Payment Projector
Project loan payments and amortization business-day schedule.
OpenMilestone Payment Schedule
Schedule milestone payments from a kickoff date.
OpenACH Settlement Date Calculator
When direct-deposit files must hit the bank to land on payday (1-day / 2-day / same-day ACH).
OpenStock Option Post-Termination Exercise
Final day to exercise vested options after leaving — measured in NYSE/NASDAQ trading days.
OpenLetters of Credit Presentation Clock
UCP 600 document presentation deadline from bill-of-lading.
OpenReg CC Check Funds Availability
How long the bank can legally hold a deposit under Federal Reserve Regulation CC.
OpenT+1 / T+2 Trade Settlement
Equity, bond and FX settlement dates with NYSE/NASDAQ market-holiday handling.
OpenNZ Trade Settlement Date
Settlement dates using NZX trading-day rules and NZ public holidays.
OpenPersonal
Age in Business Days
How many business days old are you?
OpenPregnancy Milestone Calculator
Trimesters, due date and milestone planner.
OpenSchool Term Business Day Counter
Working days remaining in a school term.
OpenWarranty / Guarantee Expiry
When does my warranty run out?
OpenRetirement Date Projector
When can I retire — business days countdown.
OpenDivorce / Marriage Waiting Period
State waiting periods for divorce or marriage license.
OpenLegal
Legal Notice Deadline
Compute statutory notice deadlines by business days.
OpenCourt Date Calculator
Project court hearing dates from filing.
OpenRight of Rescission (3-Business-Day)
TILA rescission deadline (US).
OpenCooling-Off Period Calculator
Statutory cooling-off period end date.
OpenEviction Notice Deadline
Statutory eviction notice cure period.
OpenStatute of Limitations Deadline
Statute of limitations expiry by claim type.
OpenMechanic’s Lien Filing Deadline
State mechanic’s lien filing deadlines.
OpenPatent / Trademark Deadline
USPTO response and renewal deadlines.
OpenDiscovery / Court Filing Deadline
Discovery and motion filing deadlines.
OpenProbate Timeline Calculator
Probate estate administration timeline.
OpenService of Process Deadline
Add jurisdictional response time to a served document, accounting for delivery method and court holidays.
OpenNZ Court Filing Deadline
Filing deadlines under New Zealand court rules with regional public-holiday adjustments.
OpenCourt Deadline Extension
Adjusted deadline when the court is closed for holidays or judicial recess.
OpenNZ Filing Same-Day Cutoff
Same-day vs. next-day filing based on submission time and cutoff.
OpenHR
Payroll Pay Period Generator
Generate pay periods (weekly / biweekly / semi-monthly).
OpenVacation Accrual Projector
Project vacation/PTO accrual over time.
OpenProbation Period End Date
When does the probation period end?
OpenNotice Period / Last Working Day
Calculate the last working day from a resignation notice.
OpenFinal Paycheck Deadline (US)
State-by-state final paycheck deadline.
OpenFCRA Adverse Action Waiting Period
FCRA pre-adverse / adverse action timing.
OpenWARN Act Layoff Notice Compliance
Earliest layoff date given a notice issued today (federal + state mini-WARN).
OpenFMLA Leave Return-to-Work
Project the mandatory return-to-work date from FMLA leave start.
OpenI-9 Form 3-Business-Day Deadline
When new-hire I-9 documents must be signed and filed — 3 business days from start.
OpenPayroll Working Days per Period
Count payable workdays inside a weekly / fortnightly / monthly pay period.
OpenHybrid Work Schedule Calculator
Office vs. remote days per month for any hybrid pattern.
OpenRotating Shift Calendar
4-on-4-off, panama, dupont and custom shift rotations.
OpenPTO / Vacation Workday Counter
Count leave days excluding weekends, holidays and company shutdowns.
OpenNZ Employment Notice Period
Last working day under New Zealand employment notice rules.
OpenCompliance
Tax Filing Deadline Extender
Tax filing extension deadlines (US).
OpenGDPR / DSAR Response Deadline
Data subject access request response deadline.
OpenHIPAA Breach Notification Deadline
60-day HIPAA breach notification clock.
OpenOPT / STEM OPT / Visa Grace Period
F-1 OPT, STEM-OPT and visa grace period.
OpenSEC Filing Deadline
10-K / 10-Q / 8-K SEC filing deadlines.
OpenFOIA Statutory Response Timer
When the agency must respond to your public records request (20 business days under federal FOIA).
OpenIRS 30-Day Levy Response Deadline
Final day to request a Collection Due Process hearing from an IRS LT11 / Letter 1058.
OpenVisa Processing Time Estimator
Estimated visa-issuance date from filing, by embassy operating days.
OpenIT / SLA
SLA Response / Resolution Deadline
Service level agreement response/resolution clocks.
OpenSaaS SLA Service Credit Calculator
Total business-hours downtime vs. SLA uptime threshold, with service-credit estimate.
OpenSupport Ticket Response Deadline
First-response and resolution deadlines by priority, in business hours.
Open