Calculator Tools
10 toolsFree online calculators for percentages, dates, unit conversions, and mathematical operations. Fast results with no signup required.
Percentage Calculator
Three modes: X% of Y, what percent X is of Y, and percentage change between values.
Date Calculator
Days between dates or add/subtract days with year-month-week breakdown.
Temperature Converter
Instant Fahrenheit, Celsius, and Kelvin conversion as you type.
Credit Card Validator
Validate credit card numbers using Luhn checksum and identify card networks.
Timezone Converter & Meeting Planner
Visual timezone comparison with 400+ IANA zones, working hours overlap detection, and calendar export.
Professional IBAN Validator
Validate IBAN and BIC/SWIFT codes for 70+ countries. Modulo 97 checksum verification, format audit, and BBAN extraction. 100% private and local.
Loan Payoff Architect
Plan your financial future with our advanced mortgage calculator. Features full amortization schedules, overpayment simulations, PMI/Tax estimation, and bi-weekly logic. 100% private.
SWIFT/BIC Code Checker
Validate and decode SWIFT/BIC codes with color-coded segment breakdown, country flag display, and test BIC detection.
Math Expression Evaluator
Evaluate complex math expressions with variables, built-in functions, unit conversions, and base number support via a custom recursive descent parser.
Unit Converter
Convert between 200+ units across 10 categories: length, weight, temperature, area, volume, speed, data, time, pressure, and energy.