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Solo Task Calculator

The Solo Task Calculator estimates the total effort and completion time for a batch of personal tasks. It combines the number of tasks, average task duration, setup time, rework allowance, and daily available time into a practical plan for one person.

Use it when processing a backlog of similar items, such as applications, product listings, reports, lessons, or administrative requests. The result shows both total hours and the number of workdays required, helping you decide whether to reduce scope or extend the deadline.

Inputs

tasks
minutes
minutes
%
hours
Result
—
Days required is the number of equivalent workdays at the entered daily availability. A partial final day is shown as a decimal.
Base task time—
Adjusted task time—
Total effort—
Daily capacity—

1. Count the tasks
Include only items that use roughly the same workflow.

2. Estimate task duration
Enter the average active minutes needed for one item.

3. Add setup time
Include one-time preparation such as organizing files or configuring tools.

4. Allow for rework
Add a percentage for corrections, clarifications, or repeated steps.

5. Set daily availability
Enter the hours you can actually devote to this batch each day.

6. Read the plan
Review total effort, adjusted task time, and equivalent days required.

Base task time = Number of tasks × Minutes per task
Adjusted task time = Base task time × (1 + Rework allowance % ÷ 100)
Total time = Adjusted task time + One-time setup
Days required = Total time ÷ (Available hours per day × 60)

What the result means

Days required is the number of equivalent workdays at the entered daily availability. A partial final day is shown as a decimal.

The model uses one average task duration. Separate the work into groups when task sizes vary substantially.

Given:
18 tasks, 35 minutes each, 45 setup minutes, 10% rework, and 4 available hours per day.

Calculation:
Base task time = 18 × 35 = 630 minutes.
Adjusted task time = 630 × 1.10 = 693 minutes.
Total time = 693 + 45 = 738 minutes = 12.3 hours.
Days required = 738 ÷ 240 = 3.075 days.

Result:
The batch requires about 12 hours 18 minutes, or 3.08 four-hour workdays.

Should setup time be entered once or per task?

Enter it once. If every task has its own setup step, include that time in the average minutes per task.

What does rework allowance cover?

It covers expected corrections or repeated work. It is applied to task time, not the one-time setup.

Can I use zero tasks to estimate setup only?

Yes. The result will contain only the one-time setup time.

Why are required days shown as a decimal?

The decimal expresses the fraction of the final workday needed. Multiply the fraction by daily hours to convert it to hours.

When should I split tasks into groups?

Split them when different task types have meaningfully different durations or rework rates, then add the group totals.