| What it does | Free attendance calculator for students to track how many classes they can safely miss
| US paycheck calculator for all 50 states and DC with exact take-home pay calculations
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| Stage | Not given
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| Founded | Not given
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| Based in | Not given
| US
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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
| - Interactive calculator for salary and state with instant take-home results
- Effective and marginal tax rate calculations
- Live state-by-state comparison map
- 401(k) and pre-tax deduction modeling
- 51 state-specific calculators with local tax rules
- Property tax calculators for all counties
- Hourly to annual income conversions
- Self-employment and gig worker tax calculations
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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 directly on official 2026 IRS and state DOR data updated quarterly
- Accurate to within $50/year for most income levels
- Privacy-first: all calculations run in-browser, no data sent to servers
- Open datasets available for researchers and journalists
- Reproducible calculation engine verified against official sources
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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 | 7 ● no change since last check |
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| Trust Flow (Majestic) | 1 | 8 |
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| Citation Flow (Majestic) | 19 | 19 |
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| Referring domains (Majestic) | 3 | 26 |
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CalcAttendance
StateTakeHome