THE CALCULATOR LIBRARY

Tools for real decisions.

Free calculators with useful explanations. Choose the question you need answered and adjust the numbers yourself.

Money & finance

Mortgage Calculator with Extra Payments

Estimate mortgage payments, calculate extra-payment interest savings, and download an amortization schedule.

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Money & finance

Canadian Mortgage Calculator

Monthly Canadian mortgage payments, semi-annual compounding and CMHC planning.

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Money & finance

Rent vs. Buy Calculator

Compare long-term renting and homeownership using adjustable assumptions.

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Everyday math

Percentage calculator

Find percentages, changes, and differences in seconds.

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Money & finance

Loan payment calculator

Estimate monthly payments, total interest, and payoff cost.

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Home & projects

Area calculator

Calculate floor and rectangular surface area with units.

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Mortgage decision guides

What extra mortgage payments actually save · 15-year versus 30-year mortgage