Online Tools
Free calculators and utilities — finance, tax, health, networking, and reference data. All client-side, no data transmitted.
ROI Calculator
Calculate return on investment, annualized returns, and profit/loss
US Tax Calculator
Estimate federal income tax for personal and self-employment (2025 brackets)
Price Estimator
Project future stock prices using growth rate or P/E multiple
Word Counter
Count words, characters, sentences, and estimate reading time
Calorie & Macro Calculator
Estimate daily calories, protein, carbs, and fat targets
Unit Converter
Length, weight, temperature, area, volume, speed, data
DNS Lookup
MX, A, CNAME, TXT, NS records for any domain
IP Blacklist Check
Check if an IP is listed on 10 major RBL/DNSBL zones
US States & Capitals
All 50 states with capitals, abbreviations, population
Countries & Capitals
Countries of the world with capitals and languages