General
Yes! All tools on OnlineConvers are completely free to use with no registration, no login, and no subscription required. We believe everyone deserves access to accurate calculation tools.
No account is needed. Simply visit the tool you want and start calculating instantly. Your inputs are never stored or transmitted — everything runs in your browser.
No. All calculations run entirely in your browser using JavaScript. No data you enter is ever sent to our servers. Your financial, electrical, or personal inputs remain completely private on your device.
Yes! OnlineConvers is fully responsive and works on smartphones, tablets, and desktops. The interface adapts automatically to your screen size for a comfortable experience on any device.
Paycheck Calculators
Our paycheck calculators use 2026 federal tax tables and state-specific rates. They are close estimates but may differ from your actual paycheck due to your employer's specific deductions, benefits, garnishments, or rounding methods. Always confirm with your HR department or a CPA.
We support all 50 U.S. states plus Washington D.C. State income tax rates, no-income-tax states, and flat-rate states are all handled appropriately based on the latest available data.
Electrical & Wire Tools
Our electrical calculators follow standard formulas based on Ohm's Law, NEC (National Electrical Code) wire sizing tables, and IEEE standards. Conversions for volts, amps, watts, and kVA are based on universally accepted formulas. Always verify with a licensed electrician for real installations.
AWG (American Wire Gauge) is the standard used in the United States and Canada. SWG (Standard Wire Gauge / British Wire Gauge) is used in the United Kingdom and some other countries. The same gauge number in AWG and SWG refers to different physical diameters — our calculators handle both systems with accurate conversion tables.
Other Tools
We currently offer 49 math tools covering scientific calculations, fractions, trigonometry, statistics, algebra, geometry, and more. New tools are added regularly.
We appreciate your feedback! Please use our Contact page to report any bugs, incorrect calculations, or suggestions. Include the tool name, your inputs, and the expected vs. actual result so we can investigate quickly.
Absolutely! We love hearing from users. Visit our Contact page and describe the tool or feature you'd like to see. We review all suggestions and prioritize the most requested ones.
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