Calculators
Mortgage, income tax, unit conversion, countdown timer, reaction test, and everyday tools
Mortgage calculator
Calculate mortgage payments, interest, and total repayment.
Income tax calculator
Calculate salary income tax and after-tax income.
Unit converter
Convert length, weight, temperature, area, and volume units.
Countdown timer
Custom countdown timer with optional sound alert.
Reaction time test
Measure reaction time via color change, 3 attempts averaged.
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