| What it does | UK calculators for work, hours and pay with every figure cited to source
| Free one rep max calculator with seven formulas and percentage charts
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| Stage | Not given
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| Founded | Not given
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| Based in | GB
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| Pricing model | Free
| Free
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| Pricing | Not given
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| Key features | - Timesheet calculator
- Minimum wage checker
- Take-home pay calculator
- Holiday entitlement calculator
- Maternity pay calculator
- Redundancy pay calculator
- Sources cited with dates
- Shows calculation workings
- Letter templates
- Guides explaining rules
| - 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
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| What makes it different | - Every figure cited to its source with dates so you can check rather than trust
- All workings shown step by step for every calculation
- No sign-up required and nothing stored from calculators
- Covers all four UK jurisdictions including Scotland and Northern Ireland
- Honest about areas where the law is genuinely unsettled
| - 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)
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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) | 4 | 0 |
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| Referring domains (Majestic) | 2 | 0 |
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HoursHQ
OneRepMax