Calculators
7 free toolsQuick, accurate calculators for everyday math — from BMI and loan payments to age and date differences. Every calculation runs in your browser with zero data sent to any server.
Calculators
About these calculators▼
From splitting a restaurant bill to planning a mortgage, calculators are tools people reach for every day. The challenge with online calculators is trust — you need to know that the formula is correct and that your personal data (financial details, health metrics, birth dates) is not being collected or shared.
Every calculator on Toobits uses standard, well-documented formulas. The BMI calculator uses the WHO formula. The loan calculator uses the same amortization formula that banks use. The age calculator correctly handles leap years and varying month lengths. The tip calculator supports custom percentages and group splitting with fair rounding.
All calculations happen entirely in your browser. Your financial information, health data, and personal dates are never sent to any server, stored in any database, or accessible to anyone but you. Use these calculators as many times as you need — there are no limits, no accounts, and no ads that require your data.
Yes. All calculators use standard formulas. The BMI calculator follows the WHO formula; the loan calculator uses standard amortization.
No. All calculations happen in your browser. Nothing is sent to our servers.
Yes, completely free. No subscription, no signup, no limits.
Once the page is loaded, most tools work without an internet connection since all processing happens in your browser.
Yes. All tools are fully responsive and tested on iOS and Android browsers.