| What it does | Free calculators for sleep, mental wellbeing, recovery, fitness, nutrition and healthy living
| Free pay calculators for workers and employers
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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 | - Sleep Cycle Calculator for planning bedtimes based on 90-minute cycles
- Bedtime Calculator to find sleep time based on wake-up time and duration
- Wake-Up Time Calculator based on bedtime and sleep cycles
- Sleep Debt Calculator to estimate missed sleep over a week
- Caffeine Half-Life Calculator to estimate caffeine remaining in body
- How Much Sleep Do I Need Calculator with age-based estimates
- 20 calculator hubs across Sleep, Mind, Body, Family and Lifestyle categories
- Transparent formulas showing the math behind each result
- Evidence-based references citing primary sources
- Editorial and clinical review for sensitive health tools
| - Overtime pay calculator based on US federal FLSA rules
- Notice period calculator for UK employment law
- Freelance day rate calculator for annual income conversion
- Shift differential pay calculator for night shifts and weekends
- Reverse sales tax calculator
- Instant results with no loading time
- No data stored or shared
- Works on all devices
- Full calculation breakdown included
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| What makes it different | - Private calculations in browser with no account required or personal data selling
- Transparent formulas and methodology for every calculator
- Evidence-based content citing primary sources not rewrites
- Regularly updated formulas with versioning and review dates
| - Based on official employment law with transparent formulas and sources
- No sign-up, account, or data collection required
- Completely free with no hidden charges or premium plans
- Built for practical real-world use, not accounting expertise
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 17 ● no change since last check | 1 ● no change since last check |
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| Trust Flow (Majestic) | 0 | 1 |
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| Citation Flow (Majestic) | 10 | 12 |
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| Referring domains (Majestic) | 16 | 11 |
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WowSleepCalculator
PayCalcTools