Every loan and interest question, answered to the cent

Free loan, mortgage & interest calculators. Standard amortization and compound math, exact results, first-year tables on every page — no sign-up, no ads in the way.

Mortgage calculator

Monthly payment, total interest, first-year table

Loan calculator

Any installment loan, exact amortization

Compound interest

What savings grow to — monthly compounding

Savings goal

The monthly deposit that hits your target

CAGR

The smoothed growth rate between two values

Popular scenarios

$300k mortgage @ 6.5% / 30y $200k mortgage @ 6% / 30y $500k mortgage @ 5.5% / 15y $20k loan @ 7.5% / 5y $30k loan @ 8% / 6y $10k invested 10y @ 7%

How Loanquill works

Every calculator on this site runs the standard textbook formulas — the same amortization your bank uses — and every scenario page shows its full first-year payment table so you can see where the money goes, not just a headline number. Nothing here is an estimate of "what your bank might charge": given the inputs, the arithmetic is exact.