Time Calculators

Elapsed Days Calculator

Calculate the number of elapsed days between two dates. Choose inclusive or exclusive counting, see weeks, and use for legal deadlines, contracts, and planning.

Practical applications

  • • Contractual and legal deadlines
  • • Vacations, leaves, and advance notices
  • • Duration of projects and events

Related calculators

Veja também Dias Úteis, Dia da Semana e Idade.

Dica rápida

Use a contagem inclusiva para prazos legais e acordos trabalhistas. O modo exclusivo é útil em análises de intervalos, como tempo decorrido entre eventos sem considerar o primeiro dia.

What are elapsed days?

Elapsed days (or calendar days) are all the consecutive days between two dates, including Saturdays, Sundays, and holidays. Unlike business days, which exclude weekends and holidays, elapsed days represent the absolute linear time that passes on the calendar. The concept is used in contracts, legal deadlines, vacation calculations, leaves, and contractual penalties.

Inclusive vs. exclusive counting

The difference between inclusive and exclusive counting directly impacts the result and is crucial for the correct interpretation of contracts and legal deadlines.

Contagem Inclusiva

Includes both days (start and end) in the count. It is the most common method in commercial and civil contracts.

Contagem Exclusiva

Excludes the initial day, counting only full days between the dates. Software systems generally use this logic.

Frequently asked questions

What is the difference between elapsed days and business days?+

Elapsed days count all days of the calendar (including Saturdays, Sundays, and holidays). Business days exclude weekends and holidays. Example: from Monday (day 1) to Sunday (day 7) = 7 elapsed days, but only 5 business days. Legal deadlines and contracts specify which to use.

What does inclusive vs. exclusive counting mean?+

Inclusive: Counts both days (start and end). Example: 01/01 to 05/01 = 5 days (1, 2, 3, 4, 5). Exclusive: Excludes the initial or final day. Example: 01/01 to 05/01 = 4 days (2, 3, 4, 5). Contracts generally use inclusive. Software systems prefer exclusive.

How to calculate legal deadlines correctly?+

In Brazil, procedural deadlines (CPC Art. 219) count elapsed days but exclude the initial day and include the final day. If the due date falls on a holiday/weekend, it is extended to the next business day. Use our Business Days calculator for accuracy with holidays.

How to handle leap years in the calculation?+

Our calculator automatically considers leap years (February 29th). Years divisible by 4 are leap years, except those divisible by 100 (unless divisible by 400). Examples: 2020 was a leap year, 1900 was not, 2000 was. This affects periods that cross February.