Launching today
CalcPrincipal
85 free finance calculators with the math explained
2 followers
85 free finance calculators with the math explained
2 followers
CalcPrincipal is a free collection of 85 finance calculators — mortgage and loan payments, compound interest, APR the way lenders must disclose it, credit card payoff, retirement and 401(k) growth, savings goals and debt payoff plans. Every calculator shows its result with a chart and a plain-English "how this is calculated" note. No sign-up, free forever.
Free
Launch Team
Atlassian LoomTalk it through in Loom. Ship with AI
Promoted
Hi everyone — the CalcPrincipal team here. We built the calculators we couldn't find done carefully: every formula checked against published reference values, and every page explaining its own math in plain English, so you can see how each result is worked out. CalcPrincipal is free, with no sign-up, and includes 85 calculators covering mortgages, loans, compound interest, APR, credit card payoff, retirement and 401(k) growth, savings goals and debt payoff plans. We would love your feedback — and please tell us which calculator we should add next!