| What it does | Free online calculators and unit converters for finance, health, and everyday calculations
| Offline calculators for electricians, builders and HVAC technicians
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| Stage | Established
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| Founded | Not given
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| Based in | Not given
| US
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| Pricing model | Free
| Freemium
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| Pricing | Not given
| Free: nine calculators (voltage drop, Ohm's law, watts to amps, concrete slab, roof pitch, board feet, BTU, CFM, BTU to kW), no time limit. Pro: $9.99 per year or $19.99 lifetime (one payment, no renewal).
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| Key features | - BMI and health calculators
- EMI and loan payment calculators
- Compound interest and investment projections
- US mortgage calculator with amortization tables
- TDEE and calorie calculators
- Currency converters with live exchange rates
- Embeddable calculator widgets for publishers
- Browser-based calculations for privacy
- Transparent formulas and source documentation
- Country-specific tax and payroll tools
| - Wire sizing and voltage drop calculations
- Conduit fill and box fill calculations
- Offline operation with no network required
- Transparent calculation steps and NEC warnings
- Job organization and PDF/CSV export
- Motor and generator sizing calculators
- Power and conversion calculators
- Building calculations for concrete and roof pitch
- No ads and no account required
- Private with data staying on device
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| What makes it different | - Instant private results stored in browser only
- Transparent formulas and assumptions visible for every calculation
- Over 997 free tools with no account required
- Source-backed reference data and country-specific tools
- Embeddable widgets for educators and publishers
| - Works completely offline with no network or cellular signal required
- Private by design with no account, no ads, and calculations never leaving your device
- Shows exact NEC formulas and calculation steps so you can verify results before fieldwork
- Over 35 specialized calculators covering electrical, building and HVAC trades
- Tested code with automated tests against independently worked examples
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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 | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 0 | 0 |
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| Citation Flow (Majestic) | 19 | 13 |
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| Referring domains (Majestic) | 5 | 1 |
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Calxo AI
BuildWire Calc