Date Calculator
Overview
Calculate days between dates, add or subtract days, and count business days. Perfect for contracts, deadlines, and time management.
Key Facts
| Field | Value |
|---|---|
| Calculator ID | date |
| Category | Education |
| Vertical | Education & Learning |
| App route | /verticals/education/date |
| API endpoint | /api/public/calculate?id=date |
Inputs
| Input ID | Label | Type | Required | Default | Constraints |
|---|---|---|---|---|---|
mode | Calculation Mode | select | Yes | between | - |
startDate | Start Date | date | Yes | 2026-04-20 | - |
endDate | End Date | date | No | 2026-05-20 | - |
daysToAdd | Number of Days | number | No | 90 | min 0, max 36500 |
includeBusinessDays | Mode | select | No | false | - |
How to Use
- Choose Mode — Select days between, add days, or subtract days
- Enter Dates — Input your start and end dates or number of days
- Enable Business Days — Check box to exclude weekends from calculation
- View Results — See total days, weeks, months, years, and day of week
Result Surfaces
| Output | Display Type | Format |
|---|---|---|
| Computed results | result-card | - |
Related Calculators
FAQ
How are business days calculated?
Business days exclude weekends (Saturday and Sunday). The calculator counts Monday through Friday only. Holidays are not automatically excluded, but you can manually adjust the result.
What is the difference between calendar days and business days?
Calendar days include all days (Monday-Sunday), while business days only count weekdays (Monday-Friday). A 10 calendar-day period might only be 7-8 business days depending on weekends.
Can I calculate dates in the past?
Yes! Use the "Days Between" mode to find how many days ago something happened, or "Subtract Days" to count backward from a specific date.
Evidence
src/lib/calculators/registry.ts(metadata)src/lib/calculators/page-registry.ts(page/HowTo metadata)src/lib/calculators/education/date.ts(calculator config)
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