CalcolaFacile
Free online calculators and developer tools
Practical tools for percentages, VAT, margins, markup, salary estimates, unit conversions and developer workflows. Use JWT, JSON, Base64, timestamp, URL encoding, UUID and LLM token tools directly in your browser.
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VAT Calculator
Add or remove VAT at 22%, 10% and 4%.
AI Cost Calculator
Estimate AI model API costs from tokens and daily request volume.
Compound Interest Calculator
Simulate investment growth with average annual return and monthly contributions.
GPS Coordinate Converter
Convert GPS coordinates, generate GeoJSON and build paths from multiple points.
Browse by category
Quickly find the right group of tools: AI, development, conversions, business, network and date/time.
AI Tools
Token estimators, AI cost calculators and utilities for LLM workflows.
Developer Tools
JSON formatter, JWT decoder, Base64, UUID and web development utilities.
Unit Conversions
Convert units, weight, length, temperature and volume.
Business & Finance
VAT, margins, markup, salaries and business calculators.
Network & Security
Public IP, VPN and network/security utilities.
Date & Time
Unix timestamps, time conversions and date/time utilities.
Why use CalcolaFacile?
CalcolaFacile collects small, fast online tools for everyday calculations, business pricing and developer work. You can calculate percentages, VAT, margins, discounts, salary estimates and unit conversions, or use browser-based utilities for JWT, JSON, Base64, timestamps, URL encoding, UUID generation and LLM token estimation. Each page includes simple explanations, practical examples and instant results directly in the browser.