| What it does | Free online Texas Instruments TI 84 Plus CE graphing calculator simulator for algebra, calculus, matrices, and standardized test prep
| Free Mifflin-St Jeor calculator that shows every step of the equation
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| Stage | Not given
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| Founded | Not given
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| Based in | Not given
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| Pricing model | Free
| Free
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| Pricing | Not given
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| Key features | - High-resolution color graphing with function plotting and curve rendering
- Numerical derivatives and definite integrals for calculus
- Matrix operations and linear system solving with row reduction
- Statistical regressions and data list analysis
- Fullscreen mode with keyboard shortcut support
- TI-30XS MultiView scientific calculator mode
- Mobile responsive design with touch-friendly buttons
- Works on Chromebooks, iPads, Mac, Windows, and Linux browsers
- No installation, account creation, or downloads required
| - 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 | - Completely free with no paywalls, subscriptions, or account requirements
- Privacy-first architecture: calculations stay on your device, never transmitted to servers
- Accurate emulation of authentic Texas Instruments hardware syntax and functions
- Distraction-free learning environment with no ads or pop-ups
| - 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) | Not checked yet ● no change since last check | 16 ▲ +1 (up) since last check |
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| Trust Flow (Majestic) | 0 | 1 |
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| Citation Flow (Majestic) | 18 | 16 |
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| Referring domains (Majestic) | 2 | 3 |
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calc84online
TDEE Steps