Free tools for AI builders and crypto users.
Calculators, countdowns, and live data widgets. No signup, no ads, no upsells. Bookmark them, share them, embed them. Built because we needed them ourselves.
AI
AI API Cost Calculator
Compare monthly spend across Claude 4.6, GPT-5, Gemini 2.5, Llama 4, and DeepSeek V3.5. Includes prompt caching savings.
DeFi
Impermanent Loss Calculator
Estimate IL for any 50/50 AMM liquidity pool. Compare HODL vs LP returns side-by-side.
Crypto
Bitcoin Halving Countdown
Live countdown to the next Bitcoin halving (block 1,050,000) with real-time chain tip.
More tools coming soon
Crypto tax estimator · MEV gas tracker · DeFi risk scorer · AI prompt token counter
Frequently Asked Questions
Are the Web3AIBlog tools free to use?
Yes. Every calculator and tool on this page is free, with no signup required. We do not run ads on tool pages.
Do you store any of my inputs?
No. All calculations run entirely in your browser. We do not save, send, or store the values you enter into our calculators.
How accurate are these calculators?
We update the underlying data (LLM pricing, halving estimates, AMM math) regularly, but these are estimates. Always verify against official sources before making financial, tax, or technical decisions.
Can I embed these tools on my own site?
Embeddable versions are not currently available. Email insights@web3aiblog.com if you have a specific embedding or licensing use case in mind.