Why we built these tools
KOT.CASH is an instant crypto exchange without registration, and most questions we get are not about the swap itself but about everything around it: how much did I really make, which network is cheaper for USDT, is this address right, how much gas will this cost. These calculators answer those questions with transparent formulas โ each page explains the math, shows a worked example and lists the limits of the model, so you can check the result yourself.
Live prices come from our public market ticker when available, but every field can be typed manually, so the tools also work for historical data and what-if scenarios.
Private by design
Calculations happen locally in your browser. Trade histories you import for the tax-lot calculator, addresses you validate and QR codes you generate are never sent to our servers. The only optional network request is loading the current Bitcoin block height from mempool.space in the halving countdown, and only when you press the button.
One rule we repeat on purpose: no legitimate tool needs your seed phrase. Our BIP39 page looks up single words only โ never type a full recovery phrase into any website.
Frequently asked questions
+Are these crypto calculators free?
Yes. All tools are free, need no registration and have no usage limits.
+Do the tools store or send my data?
No. Everything is computed in your browser. Imported CSV files and addresses stay on your device.
+Can I export results or download templates?
Yes. Most calculators export to Excel (.xlsx) or CSV, invoices and receipts print to PDF or save as Word, and ready-made templates โ portfolio tracker, DCA plan, tax-lot log, staking tracker, mining spreadsheet, take-profit ladder, invoice, receipt, inheritance checklist and seed backup worksheet โ download directly, free and without registration.
+Are the results financial or tax advice?
No. They are estimates based on the numbers you enter. Tax rates and rules depend on your jurisdiction; the tax-lot tool calculates gains per lot without applying any country's rates.