| What it does | Free one rep max calculator with seven formulas and percentage charts
| Free calculators for everyday money, health, and time questions
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| Stage | Not given
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| Pricing model | Free
| Free
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| Pricing | Not given
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| Key features | - Seven 1RM formulas (Epley, Brzycki, Lombardi, Lander, Mayhew, O'Conner, Wathen)
- Average of all formulas as recommended result
- Percentage chart from 100% to 50% of 1RM
- Rep-max table for 1RM through 12RM
- Support for kilograms and pounds
- Exercise-specific formula defaults
- RPE adjustment for reps in reserve
- Multiple exercise categories (chest, back, legs, shoulders, arms, Olympic)
- Browser-based history with no account
- Warm-up sets calculator and rep-max table
| - 38 free calculators for money, health, and time questions
- Mortgage calculator with monthly payment, taxes, insurance, and amortization schedule
- Debt payoff calculator comparing snowball vs avalanche strategies
- Instant results with no loading screens
- Privacy-first: calculations run in browser only
- Support for 150+ currencies
- Printable worksheets for budgets, trackers, and savings challenges
- 55 in-depth guides covering financial and health topics
- Standard published formulas used by lenders and institutions
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| What makes it different | - Uses seven published formulas instead of one, showing average and range for transparency
- No account, sign-up, or data storage required
- Covers dozens of exercises with exercise-specific guidance and lift variations
- Warns about formula accuracy limits and when estimates are unreliable
- Includes linked tools for related calculations (DOTS, Wilks, training max, FFMI, VO2)
| - No sign-ups, accounts, or downloads required
- Real formulas from lenders and scientific institutions instead of estimates
- Privacy-first: everything runs in browser with no data collection
- Instant results that update as you type
- Clean, clutter-free interface with no ads or noise
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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 | 3 |
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| Citation Flow (Majestic) | 0 | 9 |
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| Referring domains (Majestic) | 0 | 8 |
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OneRepMax
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