Calculator Inputs
Enter your starting point, comparison time, and target milestone. Results appear above this form after submission.
Example Data Table
This sample shows how different clean start dates, targets, and checkpoints produce streak outputs.
| Profile | Clean Start | Comparison Point | Target | Whole Days | Progress |
|---|---|---|---|---|---|
| Fresh Start | Jan 01, 2026 08:00 AM | Jan 15, 2026 08:00 AM | 30 days | 14 | 46.67% |
| Momentum Builder | Nov 01, 2025 06:30 AM | Jan 30, 2026 06:30 AM | 90 days | 90 | 100.00% |
| Year Goal | Mar 10, 2025 09:15 PM | Mar 10, 2026 09:15 PM | 365 days | 365 | 100.00% |
Formula Used
Elapsed Seconds = Comparison Timestamp − Start Timestamp
Whole Clean Days = floor(Elapsed Seconds ÷ 86,400)
Inclusive Day Count = Whole Clean Days + 1, when start day is included
Progress % = (Elapsed Days ÷ Target Milestone) × 100
Approximate Months = Elapsed Days ÷ 30.4375
Whole days use completed 24-hour blocks. Inclusive counting adds the opening day for users who prefer day-based tracking instead of strict elapsed time.
How to Use This Calculator
- Enter a streak name to personalize the result block.
- Select the clean start date and exact time.
- Choose the comparison date and time, usually now.
- Pick your timezone so dates calculate consistently.
- Add a target milestone, such as 30, 90, or 365 days.
- Optionally log a previous best streak and slip count.
- Check the inclusive option if you count the start day as day 1.
- Press the calculate button to view the summary, milestone table, graph, and export tools.
Helpful Note
FAQs
1. Does this calculator count partial days?
It calculates exact elapsed time first, then shows full completed days using whole 24-hour blocks. You also get an inclusive day count option for date-based tracking.
2. Why is my inclusive count higher than whole days?
Inclusive counting treats the starting day as day 1. Whole clean days only count finished 24-hour periods, so the inclusive view can be one day higher.
3. Can I use it for any personal recovery milestone?
Yes. It works for clean days, sober days, habit streaks, or other positive goals that depend on a start date and milestone tracking.
4. What is the target milestone field for?
It lets you set a custom goal such as 7, 30, 90, 180, or 365 days. The calculator then shows progress percentage and the expected target date.
5. Why does timezone matter?
Timezone keeps date and time comparisons consistent. This matters when your start time and current time cross midnight or when you travel between regions.
6. What does previous best streak mean?
It stores your earlier longest streak for context. The calculator compares that value with the current inclusive streak and highlights the stronger cycle.
7. What does the graph display?
The graph shows progress percentages across listed milestones. Achieved milestones appear at 100%, while upcoming ones show how close the current streak is.
8. Can I export my results?
Yes. After calculation, use the CSV button for spreadsheet-ready data or the PDF button for a printable summary of your results and tables.