Calculadora de Prazo / Deadline

Calcula quantos dias restam até um prazo e o volume de trabalho necessário por dia.
Created by
Renato Passos, Eng. de Software
Reviewed by
Renato Passos, Eng. de Software

Last updated: Apr 18, 2026

Dias restantes
25 dias
Trabalho restante
90,0 h
Trabalho por dia necessário
3,6 h/dia

Formula

dias_restantes = total − decorridos; trabalho/dia = restante / dias_restantes

About this calculator

The Deadline Calculator is a practical tool for managing project deadlines, academic submissions, or personal commitments. It tells you how many days remain until a due date and, if you input the total workload (in hours, pages, kilometers, etc.), calculates how much needs to be done per day to meet the deadline. The operation is simple: subtract the days already elapsed from the total available to get remaining days, then divide the remaining work by those days. Ideal for avoiding last-minute surprises and planning your routine realistically.

When to use? Situations like preparing a presentation in 15 days, writing a thesis in 3 months, or training for a race in 8 weeks. The calculator helps visualize the required pace, adjusting expectations. For example, if 10 days remain and you have 50 pages to study, you'll know you need to read 5 pages per day. Also useful for freelancers managing multiple deadlines. Use whenever there is a final date and a measurable amount of work.

Important precautions: the tool assumes work is distributed evenly across remaining days, which is not always realistic. Consider unforeseen events (holidays, illness, meetings) and include a safety margin. Also, the concept of 'days' can be interpreted as calendar days or business days; define it clearly at the start. If the deadline is very short (e.g., 1 day), the per-day calculation may be misleading. Use the calculator as a guide, not a guarantee.

The formula is transparent: first, calculate remaining days by subtracting days already used from total available days. Then, divide the total remaining work by the remaining days. For example, if the total deadline is 30 days, 10 have passed, leaving 20 days. If total work is 100 hours, you'll need 5 hours per day. The calculator handles any work unit (hours, tasks, kilometers) and displays the result clearly, allowing quick planning adjustments.

Frequently asked questions

How does the calculator handle holidays and weekends?

The standard calculator considers calendar days. If you need to exclude weekends or holidays, manually adjust the total available days or use a version that considers only business days.

What if the deadline has already passed?

If the due date has passed, the remaining days will be negative. In that case, the calculator indicates a delay. You can use the absolute value to know how many days ago the deadline expired.

Can I use the calculator for deadlines in hours or minutes?

Yes. Simply enter the total hours or minutes as the workload. The result per day will be in the same unit (hours/day or minutes/day).

Does the calculator work for projects with multiple stages?

It works for a single task with a final deadline. For multi-stage projects, use it for each stage separately or calculate the overall deadline with the total workload.

What is the difference between business days and calendar days?

Calendar days include all days of the calendar (including Saturdays, Sundays, and holidays). Business days exclude weekends and holidays. Choose the type that best fits your schedule.

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