Know your real numbers before they cost you.
TallyCrunch turns messy fees, rates, and margins into one clear number you can act on — for e-commerce sellers, finance shoppers, and freelancers.
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Popular calculators
High-intent tools where the right number changes the decision.
eBay Fee Calculator
Your true profit after every eBay fee.
Open calculatorFreelance Rate Calculator
The hourly rate your income goal really needs.
Open calculatorPayPal Fee Calculator
How much PayPal takes, and what you keep.
Open calculatorMortgage Calculator
Monthly payment, interest, and amortization.
Open calculatorTake-Home Pay Calculator
Your real paycheck after taxes.
Open calculatorPercentage Calculator
Percentage of an amount, plus increase/decrease.
Open calculatorAmazon FBA Profit Calculator
Margin and ROI after FBA + referral fees.
Open calculatorShopify Fee Calculator
Your real profit after every Shopify fee.
Open calculatorRefinance Calculator
Monthly savings and refinance break-even point.
Open calculatorInstant, as you type
No “calculate” button, no waiting. Every keystroke updates the result and the full breakdown in real time.
Private by design
No sign-up, no email gate. Your numbers never leave your browser — calculations run entirely on your device.
Built for decisions
Not just an answer — a line-by-line breakdown plus a plain-English guide on how the number is built and how to improve it.
From the blog
All postsOnline Marketplace Seller Fees in 2026: The Complete Data
Every major marketplace selling fee in one place — eBay, Etsy, Amazon, Poshmark, TikTok Shop, Walmart, and more — with computed real-order examples. Free to cite with attribution.
Read articleHow much house can I afford? A simple, honest answer
Lenders will approve you for more than you should spend. Here is the rule of thumb that keeps you comfortable — and how to pressure-test it against your real budget.
Read articleHow to price your products for profit (without guessing)
Most sellers price by gut feel and wonder where the profit went. Here is a simple, repeatable way to set prices that survive fees, shipping, and ads.
Read article