| What it does | Date, deadline and time calculators with visible assumptions and sources
| Free calculators that run in your browser, with the formula next to the result
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| Stage | Not given
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| Founded | Not given
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| Based in | US
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| Pricing model | Free
| Free
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| Pricing | Not given
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| Key features | - 184 calculators across 53 categories
- Shows counting rules and assumptions with each result
- Local-first processing with no data sent to servers
- Holiday and weekend calendar selection
- Business day counting
- Date arithmetic (add or subtract days, weeks, months, years)
- Sleep cycle planner with NIH-based 80-100 minute cycles
- Time zone conversion with DST handling
- Save results as images or add to calendar
- Schengen visa 90/180 day rolling window auditing
| - Real-time calculation results
- Formulas shown beside results
- Step-by-step explanations
- Browser-based with no installation required
- Expert-written blog guides
- Mobile-friendly design
- Keyboard navigation support
- 70+ calculators across 18 categories
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| What makes it different | - Shows the source and counting rule beside every answer
- No sign-up or account required to use any calculator
- All inputs stay in your browser for privacy
- Comprehensive coverage across 53 life and work categories
- Higher-risk calculators include prompts to verify with professionals
| - No account sign-up or paywall required
- Calculations run instantly in your browser with no waiting
- Data stays on your device and is never stored or sold
- Every formula verified against trusted academic and industry sources
- Free forever with no premium tier
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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 | 6 ● no change since last check |
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| Trust Flow (Majestic) | 0 | 2 |
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| Citation Flow (Majestic) | 0 | 16 |
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| Referring domains (Majestic) | 0 | 31 |
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