| What it does | Convert decimal hours to hours and minutes with exact math
| Free one rep max calculator with seven formulas and percentage charts
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| Pricing model | Free
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| Pricing | Not given
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| Key features | - Convert decimal hours to hours and minutes format
- Support for multiple units: hours, minutes, seconds, and days
- Display results in multiple formats including clock time
- One-click copy functionality
- Optional rounding to nearest minute
- Quick reference conversion charts
- Show calculation steps
- Bulk converter for pasting columns
- Exact math using microseconds instead of floating-point
- Display total minutes and seconds for results
| - 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 | - All calculations run in your browser with no data uploaded
- Exact math using whole microseconds prevents floating-point errors
- Addresses the common timesheet mistake of reading 7.30 as 7:30
- No accounts or sign-up required
- Treats wrong results as bugs with automated test coverage
| - 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) | 0 | 0 |
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| Referring domains (Majestic) | 0 | 0 |
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Decimal to Time
OneRepMax