| What it does | Free financial calculators for mortgages, loans, savings, and retirement
| Free calculators for sleep, mental wellbeing, recovery, fitness, nutrition and healthy living
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| Based in | FR
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| Pricing model | Not given
| Free
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| Key features | - How Much House Can I Afford calculator
- Rent vs. Buy comparison
- Mortgage payoff calculator
- Debt payoff strategies
- Compound interest calculator
- FIRE Number retirement calculator
- Refinance break-even analysis
- Student loan payoff calculator
- Emergency fund calculator
- Amortization schedule generator
| - 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
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| What makes it different | - Transparent assumptions displayed next to every result
- No sign-up or account required
- Calculators run in browser without sending data to servers
- Accessible explanation of financial decision reasoning
| - 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
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 4 ▼ −1 (down) since last check | 17 ● no change since last check |
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| Trust Flow (Majestic) | 9 | 0 |
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| Citation Flow (Majestic) | 19 | 10 |
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| Referring domains (Majestic) | 18 | 16 |
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MoneyCrunchLab
WowSleepCalculator