| What it does | Free attendance calculator for students to track how many classes they can safely miss
| Free exact age calculator in years, months and days for educators, clinicians and parents
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| Stage | Not given
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| Founded | Not given
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| Based in | Not given
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| Pricing model | Free
| Free
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| Pricing | Not given
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| Key features | - Calculate how many remaining classes can be missed while staying at target
- Determine how many consecutive sessions must be attended to recover if below threshold
- Track attendance for multiple subjects separately
- Browser-based with no sign-up or account required
- All calculations performed locally without sending data to servers
| - Instant calculation of exact age in years, months, and days
- Multiple output formats including test format (Y;M;D), decimal years, total days, weeks, and hours
- Automatic leap year handling
- Exact month length calculation using actual days per month
- Custom reference date selection for past or future dates
- No registration or sign-up required
- Browser-based calculation with no data storage
- Clean interface without ads or clutter
- Results in standardized test format
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| What makes it different | - No account or sign-up needed – instant access with no data collection
- All calculations happen in your browser – attendance data never leaves your device
- Supports multiple institutional requirements with 75%, 80%, 85%, and 90% target options
- Tracks multiple subjects simultaneously to prevent any single module from sliding below threshold
- Built and maintained by a single developer focused on honest, accurate answers
| - Built specifically for professionals who need accurate age calculations for standardized assessments and school placement decisions
- Completely private with all calculations done in your browser and no data collection
- Handles edge cases that trip up manual calculation like leap years and month-end dates
- Free alternative to discontinued publisher tools that professionals previously relied on
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | Not checked yet ● no change since last check | 11 ● no change since last check |
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| Trust Flow (Majestic) | 1 | 3 |
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| Citation Flow (Majestic) | 19 | 20 |
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| Referring domains (Majestic) | 3 | 59 |
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CalcAttendance
Chronological Age Calculator