| What it does | Free, real-time 401(k) calculator showing contributions, employer match and compound growth
| Free professional construction calculators for contractors, DIYers and architects
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| Pricing model | Free
| Free
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| Pricing | Not given
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| Key features | - Live, real-time calculations that update as you type
- Breaks down balance into contributions, employer match and investment growth
- No signup or account required
- All calculations run in the browser with no data stored
- Updated for 2026 IRS contribution limits
- 11 focused calculators for different 401(k) scenarios
- Visual chart showing balance growth over time
- Employer match calculator
- Roth vs traditional comparison tool
- Early withdrawal penalty calculator
| - 45 specialized trade calculators
- Real-time calculation updates as you type
- PDF and Excel export with company branding
- Adjustable waste factors on all calculators
- Material rate library with regional presets
- Multi-language support in 13 languages
- Mobile-friendly responsive design
- Works offline entirely in browser
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| What makes it different | - Fully transparent formulas shown for every calculation
- IRS-accurate calculations verified against official guidance
- No advertising or sponsored products
- Complete privacy with client-side-only calculations
- Worked examples showing calculations step-by-step
| - No sign-up, no account required
- Privacy-first: all calculations run locally in browser
- Industry-standard formulas from ACI, NEC, and IRC codes
- Professional exports ready for client bids and supplier orders
- Customizable material rates that sync across all calculators
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 8 ▲ +1 (up) since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 17 | 0 |
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| Citation Flow (Majestic) | 10 | 13 |
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| Referring domains (Majestic) | 19 | 1 |
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401k Calculator
BuildingCalc