| What it does | Free pay and money calculators with 2026 tax tables
| Offline calculators for electricians, builders and HVAC technicians
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| Stage | Not given
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| Founded | Not given
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| Based in | US
| US
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| Pricing model | Free
| Freemium
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| Pricing | All calculators are free to use with no sign-up required.
| 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 | - 50 free calculators covering pay, debt and everyday money
- State-by-state paycheck calculations with current tax brackets
- All calculations run in browser—no data sent to servers
- No sign-up or login required
- Built from primary sources: IRS, SSA, DOL and state agencies
- Regression-tested with over 1,200 automated checks before release
| - 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 | - All calculations are transparent: every formula is shown and verifiable against official sources
- Privacy by design: all math runs locally in your browser, no data collection
- Completely free with no sign-up, ads or paywalls
- Covers U.S.-specific rules: every state, FLSA overtime, tax law and payroll convention
| - 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) | 1 | 0 |
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| Citation Flow (Majestic) | 32 | 13 |
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| Referring domains (Majestic) | 13 | 1 |
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