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Simple Calculators — Built to Just Work

Mortgage, loan, BMI, paycheck, retirement, percentage — clean calculators with no upsells, no signup walls, and no popups in your face.

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Popular Calculators

Calculate monthly mortgage payments, total interest, and amortization schedule.

Personal loan, auto loan, or any fixed-payment loan. See total cost.

Body Mass Index from height and weight. Imperial or metric.

Quick tip + bill split for restaurants, taxis, and group bills.

X% of Y, percentage change, percentage difference. All in one.

Project savings growth and retirement income with custom contributions.

Plug in your numbers, see your monthly payment in seconds.