| What it does | Measure rooms and plan DIY flooring projects with feet, inches and metric units
| Free Mifflin-St Jeor calculator that shows every step of the equation
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| Pricing model | Free
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| Pricing | Not given
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| Key features | - Calculate area in feet, inches, decimal feet, meters and centimeters
- Support for rectangular, L-shaped, circular and triangular rooms
- Add up to 20 rooms together
- Automatic unit conversion between feet, inches and metric
- Flooring calculator for waste allowance and whole-box rounding
- Handles closets, alcoves and cutouts
- View formulas and assumptions
- No account required
- Fractional inches support
| - Shows full equation working with step-by-step substitution
- Multiple activity levels from sedentary (×1.2) to extra active (×1.9)
- Katch-McArdle calculator using body fat percentage
- Step-based TDEE estimation
- Adaptive TDEE calculator from weight changes
- Embeddable calculator iframe
- Metric and imperial unit switching
- Comparison with other equations like Harris-Benedict
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| What makes it different | - Correctly handles feet and inches together without requiring manual conversion
- Includes measuring diagram for L-shaped rooms
- Explains the difference between measured area, waste allowance and whole-box rounding
- Calculations stay private in your browser with no account needed
| - Shows all working so users can verify the math themselves
- Uses the most accurate equation for healthy adults
- Multiple calculation methods beyond basic equation
- Transparent about accuracy limitations and sources
- Completely free with no tracking or cookies
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 14 ● no change since last check | 16 ▲ +1 (up) since last check |
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| Trust Flow (Majestic) | 7 | 1 |
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| Citation Flow (Majestic) | 16 | 16 |
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| Referring domains (Majestic) | 23 | 3 |
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Square Footage Calculator
TDEE Steps