Add Business Days To Date Calculator

Enter a start date and how many business days to add. The calculator advances one UTC calendar day at a time, counting only weekdays (Monday through Friday). Saturdays and Sundays are never counted as business days.

The start date is not included in the count—the same rule as the SLA Deadline Calculator’s business-day mode and the shared addBusinessDays utility. Adding zero business days returns the start date unchanged.

Optional US federal holiday exclusion uses the same sample holiday list as the Business Days Calculator (2024–2026). When enabled, listed holidays are skipped in addition to weekends.

Invoice deadlines, contract deadlines, SLA due dates, project schedules, and legal or notice periods when your policy counts forward in business days rather than calendar days.

The Business Time Calculators Guide explains when to use each deadline and due-date tool in this cluster—invoice due dates, contract terms, SLAs, business-day forward math, days remaining until a target date, and notice periods.

The Business Days vs Calendar Days Guide explains when weekends and holidays count and which day type applies to invoices, notice periods, SLAs, and contracts.

The Business Days Between Dates Guide explains how to count weekdays between two dates and when to use range, forward, or until-date calculators.

The Working Days Guide explains working day schedules, how they compare to business days, and common planning use cases.

The Net Payment Terms Guide covers Net 10 through Net 90, calendar vs business-day terms, and how to calculate invoice due dates before you open a calculator.

The Invoice Due Date Guide explains how to compute payment due dates from invoice dates and net terms, including weekend and holiday considerations.

The Contract End Date Guide explains how to calculate contract expiration dates, renewal reminders, and notice windows before expiry.

The Payroll Cutoff Dates Guide covers payroll cutoff deadlines, processing windows, and business-day planning for pay schedules.

The Notice Period Guide explains how to estimate notice end dates for employment, rental, contract, and vendor scenarios using calendar or business days.

The SLA Deadline Guide covers response and resolution SLAs, business-day vs hour-based clocks, and holiday handling for helpdesk and vendor agreements.

The Invoice Due Date Calculator turns invoice dates and net terms (such as Net 30) into a calendar due date, with optional weekend adjustment when a due date lands on Saturday or Sunday.

The Contract End Date Calculator finds a contract end date from the start date and term length in days, weeks, months, or years, and shows 30-, 60-, and 90-day renewal reminder dates.

The SLA Deadline Calculator adds hours, calendar days, or business days to a start date and time to produce a response or resolution deadline in UTC.

The Add Business Days To Date Calculator advances a start date by a number of business days, skipping weekends and optional US federal holidays. The Subtract Business Days From Date Calculator moves backward by the same rules when you need a date before a deadline.

The Business Days Until Date Calculator counts business days remaining until a target date from today or a custom start date, with calendar days remaining and optional US federal holiday exclusion.

The Notice Period Calculator finds a notice end date from a start date and length in days, weeks, or months—using calendar or business days—with planning reminders before the end date.

When your question is how many weekdays fall between two dates—not a single due date—use the Business Days Calculator or Working Days Calculator alongside these tools.