Calculadora de Data

Calculate date differences, add or subtract time from dates, find weekdays, and business days. Handles leap years and step-by-step solutions.

Your Input

Formato: AAAA-MM-DD

Must be on or after start date

Select a calculation type, enter your dates, and click Calculate to see results with step-by-step solutions and visualizations.

Guia do usuário completo

O que é uma calculadora de data?

A date calculator performs date-related calculations: difference between two dates, add or subtract time periods (years, months, weeks, days), days since a past date or until a future date, and which day of the week a date falls on. It handles leap years, varying month lengths, and year boundaries.

Difference = End Date − Start Date  |  Dias úteis = apenas dias úteis (segunda a sexta)

Use-o para planejamento de projetos, contagens regressivas, idade ou mandato, prazos e agendamento.

Date Format

Use AAAA-MM-DD (por exemplo, 15/02/2025). As datas do ano 1 ao 9999 são suportadas.

Tipos de cálculo

Diferença de data

Exact difference in years, months, days, weeks, and business days (Monday–Friday, excluding weekends).

Adicionar/Subtrair

Add or subtract years, months, weeks, or days from a date. Result shows the new date and day of the week.

Dias desde

How many days have passed since a past date (e.g. since birth, since an event).

Dias até

How many days remain until a future date (countdowns, deadlines).

Dia da semana

Find which day of the week (Monday, Tuesday, …) a given date falls on.

Como usar esta calculadora

  1. Select a calculation type (Date Difference, Add/Subtract, Days Since, Days Until, or Weekday)
  2. Enter the required dates and values in the form
  3. Click 'Calculate' to see the result
  4. Review the main result, detail cards (when applicable), and step-by-step solution
  5. Use o gráfico para diferença de data ou dias desde/até para ver um detalhamento visual
  6. Clique em 'Redefinir' para definir todas as datas para hoje e limpar os resultados

Compreendendo seus resultados

Main result

The primary answer: formatted difference (e.g. 2 years 3 months), result date, number of days, or weekday name.

Detail cards

For date difference: total days, weeks, months, and business days in a compact grid.

Step-by-step

Shows how the calculation was performed, including formulas and intermediate values.

Compreendendo os dias úteis

Os dias úteis são dias úteis (segunda a sexta); Sábados e domingos estão excluídos. Usado para prazos de projetos, estimativas de remessa, cronogramas de trabalho e termos de contrato. Esta calculadora não exclui feriados.

Métodos de cálculo de data

Delta relativo: Precise year, month, and day differences; accounts for varying month lengths and leap years.

De cronometrado: Total de dias entre datas (subtração simples de datas).

Business days: Count of weekdays (Mon–Fri) between two dates.

Notas importantes

  • All calculations account for leap years and varying month lengths.
  • Business days exclude weekends only; holidays are not excluded.
  • Dates must be between year 1 and 9999. Use YYYY-MM-DD format.

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