| What it does | Free fitness calculators for strength, training, nutrition and body composition
| Free professional construction calculators for contractors, DIYers and architects
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| Pricing model | Free
| Free
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| Pricing | Not given
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| Key features | - One-rep max estimation from weight and reps
- Bench press, squat, deadlift and overhead press max calculators
- 5/3/1 training cycle generator
- TDEE and BMR calculators
- Macro and protein intake calculators
- Body fat percentage estimation using US Navy method
- Barbell plate loading calculator
- RPE and RIR conversion chart
- Calorie deficit and weight loss timeline calculator
- Warm-up set generator
| - 45 specialized trade calculators
- Real-time calculation updates as you type
- PDF and Excel export with company branding
- Adjustable waste factors on all calculators
- Material rate library with regional presets
- Multi-language support in 13 languages
- Mobile-friendly responsive design
- Works offline entirely in browser
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| What makes it different | - All formulas and sources cited on every page
- No sign-up required to use calculators
- Built on established, peer-referenced formulas from fitness and sports nutrition literature
- Works in both pounds and kilograms
- Built by a lifter
| - No sign-up, no account required
- Privacy-first: all calculations run locally in browser
- Industry-standard formulas from ACI, NEC, and IRC codes
- Professional exports ready for client bids and supplier orders
- Customizable material rates that sync across all calculators
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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) | 13 | 13 |
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| Referring domains (Majestic) | 1 | 1 |
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RepMaths
BuildingCalc