| What it does | Free garage heater sizing calculator using garage dimensions, insulation, and winter temperature
| Free NZ PAYE calculator for take-home pay, tax, ACC levy, KiwiSaver and student loan deductions
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| Stage | Not given
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| Founded | Not given
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| Based in | US
| NZ
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| Pricing model | Free
| Free
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| Pricing | Not given
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| Key features | - Calculates required heat output in BTU/hr and watts from garage dimensions, ceiling height, insulation, and winter temperature
- Adjustable insulation levels from poor to excellent with whole-space planning factors
- Published formula and methodology with documented sources
- Real-time calculator updates as you type input values
- ZIP or postal code reference using NOAA weather data for local temperatures
- Embeddable calculator iframe for integration on other websites
- Companion tools for installation costs and heating method comparison
| - Progressive tax bracket calculation (10.5% to 39%)
- ACC earner's levy deduction at 1.75%
- KiwiSaver contribution rates from 3.5% to 10%
- Student loan repayment calculations above $24,128 threshold
- Independent Earner Tax Credit for eligible incomes
- Multiple pay frequency options (annual, monthly, fortnightly, weekly)
- Detailed tax breakdown showing marginal and effective tax rates
- No signup required
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| What makes it different | - Free and independent with no product catalog or affiliate commissions
- Transparent published formula so users can judge the estimate instead of trusting a black box
- Consistent sizing across all pages and guides using the same calculation engine
- Real climate data from NOAA hourly weather records for accurate local temperature estimates
| - Uses only official Inland Revenue rates and thresholds, updated regularly
- Completely free with no account or data collection required
- Instant calculations for all common salary situations
- Comprehensive deductions in one place (tax, ACC, KiwiSaver, student loans)
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 2 ▲ +2 (up) since last check | 13 ● no change since last check |
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| Trust Flow (Majestic) | 0 | 6 |
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| Citation Flow (Majestic) | 14 | 13 |
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| Referring domains (Majestic) | 2 | 16 |
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Garage Heat Lab
NZ PAYE Calculator 2026/27