| What it does | Date, deadline and time calculators with visible assumptions and sources
| Free home and garden material calculators that run in your browser
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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
| - Landscape calculators for gravel, topsoil, sand, pavers and raised beds
- Grass seed and fertilizer calculators with nitrogen targets and N-P-K analysis
- Fence, deck, roof pitch, paint and retaining wall calculators
- US and metric units with bag counts and product weights
- Formulas and sources listed on every tool page
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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
| - All math runs in your browser with no data uploaded to any server
- Formulas and sources are fully documented and transparent
- No signup required to use any calculator
- Sources verified against manufacturer yields and university extension guidance
- Completely free with no paid plans or premium features
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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 | 2 ● no change since last check |
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| Trust Flow (Majestic) | 0 | 0 |
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| Citation Flow (Majestic) | 0 | 0 |
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| Referring domains (Majestic) | 0 | 0 |
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CalcSpan
YardTally