Credit card interest calculator

r = (1 + Effective annual rate [%] ÷ 100)^(1 ÷ 12) − 1; B(next month) = maximum(0, B × (1 + r) − Monthly payment). Repayment is simulated month by month at a constant rate and payment. New spending, fees and variable payments are excluded. A payment below monthly interest cannot repay the balance.

Repayment is simulated month by month at a constant rate and payment. New spending, fees and variable payments are excluded. A payment below monthly interest cannot repay the balance. The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation.

The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation. Prices, measurements and model assumptions determine how well the result represents your situation.

Yes. Calculations and PDF export work without an account or registration.

Calculations run in your browser. Results are saved locally only when you add them to My results; favourites and history are also local. Shared links contain your values. The currency tool requests the selected currencies from its rate provider without sending your amount.