Util Monster: Calculator

Percentage, loan, compound interest, BMI, age, dates, and unit conversions in one fast offline calculator app.

Stop searching for a different calculator every time. Util Monster brings 15 practical calculators for everyday life, finance, health, and study into one clear app.

Included calculators • Percentage and discount • Loan payment and total interest • Compound interest and savings goal • BMI, BMR, and daily calorie needs • Age and date difference • Length, weight, and temperature conversion • Grade, average, circle, and speed • Tip and tax • Fuel economy conversion

Find it fast and use it again Browse by category or search by name. Save useful calculators to Favorites and reopen recently used tools without hunting for them again.

Offline first Calculations happen on your device. You do not need an account, and calculator inputs are not sent to a server.

Set it your way Choose Korean or English, light or dark appearance, and metric or imperial defaults.

Health and finance results are general estimates. Check professional or institutional guidance before making important decisions.