A personal loan calculator can quickly estimate monthly repayments, total interest and the likely cost of borrowing, helping you compare loan terms and amounts. Its drawbacks are that results may use an advertised representative APR, which may not be the rate you are offered, and might not include all fees. The figures are estimates and do not confirm your eligibility or affordability, while applying for loans can involve credit checks. Use the calculator as a starting point, then check the lender’s full terms and consider guidance from an FCA-authorised provider if you are unsure.