Everyday answers, in 150+ free calculators
Money, salary, units, dates, AI costs — every tool runs instantly in your browser. No sign-up, and your numbers never leave your device.
AI Cost Intelligence
SpecializedOur deep-dive suite — live pricing, real budgets, real decisions.
AI Model Cheat Sheet
Every model's price, context window & best use — one page, updated monthly.
Compare🤖AI API Cost Calculator
Estimate and compare your monthly bill across 14 GPT, Claude & Gemini models.
Estimate🔢Token Calculator
Paste any text — see its token count and what it costs on every model.
Simulate💬Chatbot Cost Simulator
Users × messages × tokens: budget your AI product before you build it.
Decide⚖️Subscription vs API
Is ChatGPT Plus worth $20/month for you? Find your break-even point.
Track📉AI Price Tracker
Every model's current price + a monthly changelog of cuts and releases.
Reference💠Model Pricing Directory
Dedicated pricing breakdowns for every major AI model.
Money & Loans4 calculators
Salary & Work70+ pages
Unit Conversion55+ pages
AI & Dev Tools21 pages · PRO suite
Everyday Math3 calculators
Dates & Time2 calculators
Health1 calculator
Text & Security3 tools
Money & Loans
🏠Mortgage Calculator
Full PITI payment, amortization schedule, and extra-payment savings.
💳Loan Calculator
Monthly payment and total interest for any personal or auto loan.
📈Compound Interest
How savings grow with monthly contributions and compounding.
🏷️Discount Calculator
Sale price and savings — including stacked "extra % off" deals.
Salary & Work
💼Salary to Hourly
Your true hourly rate — with real hours and vacation weeks.
🧾Take-Home Pay (2026)
Salary after federal tax, FICA, 401(k), and state tax.
📋Salary Breakdowns
Every salary from $25k to $300k, per hour, week, and month.
Unit Conversion
🔁Unit Converter
Length, weight, temperature, volume, area & speed in one tool.
📐Conversion Tables
55+ pages: cm to inches, kg to lbs, °C to °F, and more.
AI & Developer Tools
🤖AI API Cost Calculator
Compare GPT, Claude & Gemini pricing and estimate your bill.
💠AI Pricing Directory
Per-model pricing pages for every major AI model.
Everyday Math
％Percentage Calculator
X% of a number, percent of Y, and increase/decrease.
🍽️Tip Calculator
Tip, total, and per-person share when splitting the bill.
🛒Discount Calculator
What you actually pay after the sale sticker.
Dates & Time
📅Date Calculator
Days between dates (with business days), add/subtract days.
🎂Age Calculator
Exact age in years, months, days — plus next-birthday countdown.