| What it does | Free financial calculators for certificates of deposit, mortgages, retirement, and loans with charts and schedules
| Free attendance calculator for students to track how many classes they can safely miss
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| Stage | Startup
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| Founded | 2026
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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 | - Certificate of deposit calculator with growth projections and tax-adjusted returns
- Mortgage and real estate calculators including refinancing analysis
- Retirement planning tools for 401(k), IRA, pension, and Social Security
- Loan and debt payoff calculators
- CSV export and print functionality
- Transparent formulas documented on every calculator page
- Over 70 calculators across six financial categories
| - 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
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| What makes it different | - All calculations run locally in your browser with no data stored on servers
- Completely free with no sign-up, account, or paywall required
- Independent with no product recommendations or paid placements
- Transparent formulas allow verification against spreadsheets or bank statements
| - 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
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 5 ▲ +1 (up) since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 9 | 1 |
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| Citation Flow (Majestic) | 9 | 19 |
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| Referring domains (Majestic) | 27 | 3 |
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CDCalculator
CalcAttendance