| What it does | Quick, free converters and calculators for everyday use with no sign-up required
| Free Amazon FBA calculators and seller tools with verified 2026 fee rates
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| Stage | Not given
| Startup
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| Founded | Not given
| 2026
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| Based in | US
| CN
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| Pricing model | Free
| Freemium
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| Pricing | Not given
| Free core tools with no signup. Pro plan: $29.99/month or $299/year (save 17%). One-time fee audit service: $299 for up to 50 SKUs, $4 per extra SKU.
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| Key features | - Unit converters for length, weight and distance
- Cooking and baking converters including cups to grams and oven temperature
- Health calculators for BMI, body fat, calorie and pregnancy
- Math calculators including scientific, fractions and geometry
- Date and time calculators for age, birthdays and time zones
- Everyday calculators for GPA, concrete, flooring and home projects
- Calculations performed entirely in browser with no data transmission
- Internationally agreed unit conversion definitions
| - FBA Profit Calculator with all hidden fees
- PPC Analyzer for ACOS and ROAS calculation
- Fee Simulator comparing fulfillment methods
- Listing Grader with optimization tips
- Review Analyzer for competitive insights
- Inventory Optimizer with restock alerts
- Cost Tracker for expense management
- Real-time exchange rate conversion updated every 5 minutes
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| What makes it different | - No sign-up or clutter required
- Full transparency showing how calculations are derived
- Every calculator tested against worked examples before launch
- Privacy-first with calculations done entirely in browser
| - 50+ free tools with no signup, login or credit card required
- Fee rates verified monthly with open-source data published under CC BY 4.0
- Built by an 8-year Amazon FBA seller addressing real seller pain points
- Supports multiple marketplaces: Amazon US/EU/UK/JP/CA/AU, Temu, TikTok Shop, and Etsy
- Transparent formulas using industry-standard calculations verifiable by users
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 3 ● no change since last check | 23 ● no change since last check |
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| Trust Flow (Majestic) | 0 | 0 |
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| Citation Flow (Majestic) | 11 | 16 |
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| Referring domains (Majestic) | 3 | 10 |
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ylishi.tools