Tools
Free tools for founders
Interactive calculators that do the maths for your own numbers, show the formula, and give you a link you can share.
- Tools
- 6
- Price
- Free
- Sign-up
- Not needed
All tools
n8n vs Make vs Zapier Cost Calculator Enter your monthly runs and see what each platform costs in USD, CAD or AUD, plus optional AI token spend. Open tool LLC Annual Cost Calculator See what a Delaware, Wyoming, California, Texas or Florida LLC costs each year, and download every filing deadline as a calendar file. Open tool California $800 LLC Tax Checker Answer a few questions to see if your out-of-state LLC is likely doing business in California, what it owes and when. Open tool LLM API Cost Calculator Enter tokens per request and requests per month to compare the monthly API bill across Claude, GPT and Gemini models in USD, CAD or AUD. Open tool R&D Tax Credit Refund Estimator Estimate your Canada SR&ED refund, Australia R&D Tax Incentive offset or US payroll tax credit offset. Open tool Option Pool Calculator Convert post-money SAFEs, top up the option pool and price your round. Shows every formula and what the option pool shuffle costs founders. Open tool
How unboxth tools work
Your numbers, not ours
Every result comes from the inputs you type. No hidden assumptions about prices or fees.
Shareable links
Inputs are saved in the page address, so you can send a result to a co-founder or bookmark it.
Private by default
Calculations run in your browser. Nothing you enter is sent to a server.
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