| What it does | Free ecommerce calculators for profit margin, CAC, LTV, pricing, Shopify fees, and more
| Free calculators for sleep, mental wellbeing, recovery, fitness, nutrition and healthy living
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| Stage | Not given
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| Pricing model | Free
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| Pricing | Not given
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| Key features | - Profit Margin Calculator to calculate profit after all costs and fees
- CAC Calculator to measure customer acquisition cost
- LTV Calculator to understand customer lifetime value and LTV:CAC ratio
- Pricing Calculator to work backwards from target margin to set price
- Shopify Fees Calculator showing exact fees across all plans and payment methods
- Refund Impact Calculator to quantify profit erosion from refunds
- Ad Metrics Calculator for ROAS, CPC, CTR, and cost per conversion
- Product Viability Calculator with YES/MAYBE/NO verdict
- Support for multiple currencies including USD, EUR, GBP, and CZK
| - 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 | - Completely free with no premium tiers, feature locks, or trial periods
- No account creation required, no data stored on servers
- Formulas follow standard ecommerce accounting with Shopify fees kept up to date
- Works for any ecommerce platform with manual fee fields for Amazon, Etsy, WooCommerce, TikTok Shop
- No signup requirement or data tracking beyond basic anonymous analytics
| - 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) | 5 ● no change since last check | 17 ● no change since last check |
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| Trust Flow (Majestic) | 3 | 0 |
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| Citation Flow (Majestic) | 15 | 10 |
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| Referring domains (Majestic) | 14 | 16 |
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EcomCalc
WowSleepCalculator